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Medical Inteligent Insulation Monitoring Devices
Installation and Operation Manual V1.0
Acrel Co., Ltd.
Declaration
Please read this manual carefully before using this series of products, in which
the involved pictures, logos, symbols, etc. are all reserved by the Acrel Electric Co.,
Ltd. Personnel not inside the company shall not publicly reprint all or part of the
contents without written authorization.
Before using the IT system which is made up of this series of products, please read
the tips and precautions in this operation manual, and Acrel does not take responsibility
for personal injuries or economic losses caused by ignoring tips of this manual;
The contents of the manual will be continuously updated and revised, thus the
products functions in this manual may inevitably have a slight discrepancy with the
real objects during the continuous upgrading process. Users should give first place
to the purchased real products, and can search www. acrel.cn to downloads or through
sales channels to obtain the latest version of the manual.
Revision history
Number
of times
Revision
date
Versions after
revision
Reasons for revision
Note:
Table of Contents
1 Introduction ...................................................................................................................................... 1
2 Function features ............................................................................................................................ 1
3 Reference standard .......................................................................................................................... 1
4 Technical parameters ...................................................................................................................... 2
5 Installation and wiring ................................................................................................................ 3
5.2 Installation method ............................................................................................................ 3
5.3 Wiring method ........................................................................................................................ 3
5.4.1Typical wiring diagram .................................................................................................... 5
5.5 Considerations ...................................................................................................................... 6
6 Programming and application ........................................................................................................ 8
6.1 Panel description ................................................................................................................ 8
6.2 LED indicator instructions .............................................................................................. 8
6.3 Button function descriptions .......................................................................................... 8
6.4 Button operation descriptions ........................................................................................ 9
7 Communication protocol ................................................................................................................ 12
7.1 Modbus-RTU communication protocol .............................................................................. 12
7.2 CAN communication description ...................................................................................... 16
8 Typical applications .................................................................................................................... 19
8.1 Applications of insulation monitoring and fault locating seven pieces of
products in ICU/CCU .................................................................................................................. 19
9 Powerup and debugging instructions ........................................................................................ 19
9.1 Wiring check ........................................................................................................................ 19
9.2 Common faults and eliminations .................................................................................... 20
9.3 Settings and debugging .................................................................................................... 21
1
Medical Inteligent Insulation Monitoring Devices
1 Introduction
AIM-M200 medical intelligent insulation monitoring instrument adopts
advanced microcontroller technology, which has high integration, compact
size, convenient installation and integrates intelligence, digitalization
and networking in one. It is ideal selection for insulation monitoring of
isolation.
2 Function features
Functions of real-time monitoring and fault alarming of the ground insulation resistance,
transformer load current and transformer winding temperature of the monitored IT system;
Can be used with insulation fault locator, remotely starting fault-locating and displaying
locating results when there are insulation faults;
Real-time monitor the line disconnection fault, temperature sensor disconnection fault and the
functional grounding line disconnection fault of the monitored system, and give the alarm
indication within 2S after the fault occurs. when the fault occurs;
Relay alarm output, LED alarm indication and other faults indication functions;
Two kinds of fieldbus communication technology, which are used for centralized alarm and display
instrument, test signal generator, insulation fault locator and upper computer management
software communications, and can monitor the operation status of IT system in real time.
Events logging function, which can record alarm occurrence time and fault type and is convenient
for operation personnel to analyze the operation conditions of system and promptly eliminate
the faults;
3 Reference standard
◆ IEC 60364-7-710: 2002 Building electrical installations section 7-710: Requirements for special
installations or locations----medical locations;
◆ IEC 61557-8-2014 Electrical safety of low voltage distribution system below AC 1000V and DC
1500V, Test, measurement or monitoring equipment for protection test section 8: Insulation
monitoring device for IT systems;
◆ IEC61558-1: 2009 Safety of power transformers, power supplies, reactors and similar products
section 1: General requirements and tests;
◆ IEC61558-2-15: 2011 Safety of power transformers, power supplies and similar products section
2
16: Special requirements for isolation transformers for power supply in medical locations.
4 Technical parameters
Table 2 Technical Parameters of AIM-M200 Medical Intelligent Insulation Monitoring
AUX Power Voltage DC 18…36V
Temperature
monitoring
Thermal
resistor
2 Pt100
Power
consumption
≤3W Measuring
range
-50…+200℃
Insulatio
n
monitorin
g
Resistance
measuring range
15…999kΩ Alarm value
range
0…+200℃
Response value 50…999kΩ
Alarm
output
Output mode 2 Relays
Relative
uncertainty
±10%,±10K Contact
rating
AC 250V/3A
DC 30V/3A
Response time
≤3s
Environment
Operating
temperature
-10…+55℃
Permissible
system leakage
capacitance Ce
≤5uF
Transport
temperature
-25…+70℃
Measuring
voltage Um
≤12V Storage
temperature
-25…+70℃
Measuring
current Im
≤50uA Relative
humidity
5%-95%，No
condensation
Impedance Zi ≥200kΩ Altitude ≤2500m
Internal DC
resistance Ri ≥240kΩ IP degree
IP30
Permissible
extraneous DC
voltage Ufg
≤DC280V
Rated impulse voltage /
pollution degree
4KV/Ⅲ
Load Measuring Value 2.1…50A EMC/EMR IEC 61326-2-4
3
current
monitorin
g
Alarm Value 5…50A
Communication protocol
CAN，customize
Measuring accuracy ±5% RS485，Modbus-RTU
5 Installation and wiring
5.1 Shape and mounting hole size
External dimensions of AIM-M200 medical intelligent insulation monitoring instrument (unit: mm)
Acrel AIM-M200On Comm
Insulation Overtemp Test Menu Medical Intelligent Insulation Monitor Overload
1 2 4 5 8 9 11 12
13 14 15 16 17 18 19 20 21 22 23 24
24V G L1 L2 I0 T0 T1 FE KE A B COM1 H L COM2 J1 J2
I1
Front view Side view
5.2 Installation method
AIM-M200 insulation monitor adopts the installation method of the guide rail, and the fixation
mode is the clip buckle type, as shown in the following figure:
5.3 Wiring method
Upper row terminals: 24V, G for the auxiliary power supply, and L1, L2 are connected to the
monitored IT system (which can be connected can be connected with U1 and U2 in parallel, and then
connected to the two output terminals of isolation transformer). I0, I1 for the current transformer
signal input, and T0, T1 as the temperature sensor signal input.
4
Lower row terminals: KE, FE are the functional grounding wires, which should be connected to the
on-site equipotential terminals by two independent wires. A and B for RS485 communication terminals,
H and L for CAN communication terminal blocks (which are used for the communication connections
with ASG150 test signal generator, AIL150 series insulation fault locator and AID150 centralized
alarm and display instrument), J1 for over-temperature alarm output (for control of cooling fan),
and J2 for fault alarm relay output.
Note:
1) is used for the test terminals of CT secondary side short connection.
2) The wirings connecting the No.1 and 2 terminals of the insulation monitoring instrument to the
24V power supply can select 2×1.5mm2 copper wires, and the L1 and L2 terminals corresponding to
the No.4 and 5 can select 2×1.5mm2 multistrand copper wires, and the FE and KE terminals
corresponding to the No.13 and 14 can select 2×4mm2 yellow-green wires (grounding wires). J1, J2
relay output are the dry nodes, which need additional power supply during the control of external
load. For example, J1 controls AC 220V cooling fan, then the AC 220V power supply is needed, and
the wiring line type should be determined according to the load current.
3) The transformer signal wires corresponding to the No.8, 9 terminals, the temperature signal wires
corresponding to the No.11, 12 terminals, the RS485 communication wires corresponding to the No.15,
16 terminals, as well as the CAN communication wires corresponding to the No.18, 19 terminals line
can select 2×1.5mm2
shielded twisted pairs, and the COM port for communication is not connected.
5
5.4.1Typical wiring diagram
Note:
1) The connection line diameter of the input and output of the isolation transformer should match
the rated current of the isolation transformer, or it can be selected according to the following
table:
Isolation transformer type Selected line diameter
AITR3150s 3×4mm2
AITR5000/AITR6300s 3×6mm2
AITR8000/AITR10000s 3×10mm2
2) The auxiliary power supply (instrument working power) for AIM-M200 insulation monitoring
instrument (corresponding terminals: No.1, 2), ASG150 test signal generator (corresponding
terminals: No.8, 9), AIL150 insulation fault locator (corresponding terminals: No.1, 2), and AID150
centralized alarm and display (corresponding terminals: 24V, G) are all DC 24V, which is supplied
by the HDR-60-24 DC power module (24V output terminals: No.3, 4). Considering that the switching
power supply may interfere with the IT system, the AC 220V (corresponding terminals: No.1, 2) input
by DC power module is introduced by the input terminal of the isolation transformer and is connected
with the fuse protector of 6 A.
3) The relay output control of the No.21 and 22 terminals of the AIM-M200 insulation monitor is
6
a dry node, which needs an additional fan power supply when used for the fan control. When multiple
transformers are centrally installed in one isolation power cabinet, multiple fans should be
connected in a parallel mode controlled by multiple insulation monitors, that is, every one
insulation monitor can start or stop all fans.
4) AKH-0.66P26 only needs to pass through one of the L1, L2 two wires of the isolation transformer
secondary side output terminal, but can not pass through the two wires simultaneously. The output
is connected with the 2×1.5mm2 wire to the No.8, 9 terminals of AIM-M200, which is not allowed for
grounding.
5) In order to reliably monitor the grounding insulation of the isolation power system, the No.4,
5 terminals of AIM-M200 insulation monitor should be reliably connected to IT system (which can
be connected in parallel to the output terminal of the isolation transformer) with 2×1.5mm2
multicore copper wires, and the No.13, 14 terminals should be respectively connected to the on-site
equipotential terminals (or the grounding terminals in the isolation power cabinet) with two
independent 4mm2
yellow-green grounding wires.
6) In order to realize reliable fault location, the No.5, 7 terminals of ASG150 test signal generator
should be reliably connected to the IT system (which can be connected to the output terminal of
the isolation transformer) with 2×1.5mm2 multi-core copper wires, and the No.14 terminal should
be connected to the on-site equipotential terminals (or the grounding terminals in the isolation
power cabinet) with one 4mm2
yellow-green grounding wire. The two load distribution wires (excluding
PE wire) of each branch of the isolation power system should together pass through each transformer
of the AIL150 series fault locator in a top-down method, and then are connected to the terminal
load.
7) The CAN communication line between AIM-M200 (terminals 18 and 19), ASG150 (terminals 8 and 9)
and AIL150 (terminals 21 and 22) can be connected by 2 × 1.5mm2 shielded twisted pair. When wiring,
the method of hand-in-hand (that is, after the communication line of the previous table is connected
to the communication terminal of this table, it is led out from the terminal of this table and
connected to the communication terminal of the following table). The head and end of the CAN bus
One matching resistor shall be connected in parallel between the two communication terminals of.
The recommended resistance value attached with the goods is 120 Ω. Terminals 13 and 14 of AIM-M200
are RS485 communication terminals, which are used to communicate with AID150.
5.5 Considerations
(1) Medical IT system insulation monitoring and fault locating seven pieces of products should
be centrally installed in the isolation power cabinet except for AID150. If the field space is too
limited to apply the isolation power cabinet, the isolation transformer can be installed separately,
7
but should not be too far away from the insulation monitor and the field load.
(2) The installation of wiring should strictly follow the wiring diagrams, which should preferably
use the pressure connection with the needle-type fittings, and then insert into the corresponding
terminal of the instrument and tighten the screws to avoid the abnormal work conditions of instrument
caused by loose connection.
(3) The grounding wire of the instrument and the transformer shall be reliably connected with the
equipotential terminals in the field. When applying the isolation power cabinet, it should be
connected to the grounding terminals in the isolation power supply cabinet, and then to the
equipotential terminals in the field.
(4) The current input of AIM-M200 medical intelligent insulation monitoring instrument should use
a matching AKH-0.66P26 type current transformer. It is recommended to use pressure connection with
U-type indenters during wiring operation, and then connect to the CT terminal. Do not directly use
the bare head connection, for the considerations of reliable connection and easy disassembly. Before
removing the wiring, the CT primary circuits must be cut off or the secondary circuits must be short
connection.
（5）Note that AIM-M200 Medical Intelligent Insulation Monitor can not be connected in parallel
with other similar systems (such as residual current monitor).
(6) Special reminder:
Any isolation transformer will have an impact current when it starts up, and too large impact current
may cause the circuit breaker at primary side of the transformer difficult to disconnect or shut
down. Therefore, for medical IT systems composed of medical isolation transformers and insulation
monitoring products, in the selection of inlet circuit breaker of the isolation transformer, it
is recommended to choose the circuit breakers only with short circuit protection but without overload
protection according to GB requirements. If choosing the circuit breaker with overload protection,
the circuit breaker should conform to the C and D tripping curves of GB14048.2-2008, and the rated
current of the circuit breaker should be determined according to the capacity of the isolation
transformer as follows: 10kVA-63A, 8kVA-50A, 6.3kVA-40A, 5kVA-40A, 3.15kVA-20A.
If the circuit breaker selection is not in accordance with the above requirements, the company
shall not be liable for any medical malpractice caused by the closure difficulty of the circuit
breaker or the disconnection of the circuit breaker during operation.
8
6 Programming and application
6.1 Panel description
Acrel AIM-M200On Comm
Insulation Overtemp Test Menu Medical Intelligent Insulation Monitor Overload
1 2 4 5 8 9 11 12
13 14 15 16 17 18 19 20 21 22 23 24
24V G L1 L2 I0 T0 T1 FE KE A B COM1 H L COM2 J1 J2
I1
AIM-M200 medical intelligent insulation monitoring instrument panel
6.2 LED indicator instructions
LED indicator instructions of AIM-M200 medical intelligent insulation monitoring instrument
Indicator Instructions
On
When the instrument operation is normal, the indicator light flashes,
with the flashing frequency of about one time per second.
Comm
Indicate the status of device communication, when there is data
communication, the indicator light flashes.
Insulation
When the insulation resistance exceeds the alarm value, or when the LL/FK
is disconnected, the indicator light flashes to alarm.
Overload
When load current exceeds the total load current of transformer, the
indicator light flashes to alarm.
Overtemp
When testing transformer temperature exceeds the alarm value, or when
the temperature sensor wiring is disconnected, the indicator light
flashes to alarm.
6.3 Button function descriptions
6.3.1 Button function descriptions of AIM-M200 medical intelligent insulation monitoring instrument
AIM-M200 has four buttons in total, namely the “Setting and Enter” shared button, “” Up button,
9
“”Down button, and “Self-test” button.
Buttons Button function
Setting and Enter
shared button
In non-programming mode, press this button to enter the programming
mode;
In programming mode, used as the Enter button. Up button, Down button
In non-programming mode, used to view the fault records, the version
signal, or to register addresses to AID150. In programming mode, used
to increase or decrease the values and digits, or to change the
protection action status
Self-test button. In operation state, used to start the self-test function of
instrument. In other state, used as return function.
6.4 Button operation descriptions
6.4.1 Button operation of AIM-M200 medical intelligent insulation monitoring instrument in RUN mode
(1) Enter RUN the operation mode. The mode of the default entry is RUN mode, after the LCD displays
the software version number, if you do not do other button operation, the system goes into RUN mode
and starts operation. The main interface shows the insulation resistance value, temperature value,
current value, load rate and current system time.
(2) View the alarm records. In the main interface, press "Down button" to enter the "Fault records
query" interface, and press "enter" button to confirm, then you can turn the pages through "Down
button" or "Up button" to query each fault record in sequence. The first record is the most recent
record, and the tenth is the oldest record.
(3) View software version information. In the main interface, you can see the version information
of the software by pressing the "Down button" twice consecutively.
(4) Register address (CAN communication address) to AID150. When AIM-M200 and AID150 are used
together, if AIM-M200 does not successfully register address to AID150, the manual registration
is required. In the main interface, press the "Down button" three times consecutively, entering
into the AID150 address registration interface, and press Enter button to achieve address
registration. After the registration, it will automatically return to the main interface. If the
registration is successful, the CAN communication indicator light starts flashing, indicating that
communication is normal.
(5) Instrument self-test. In the main interface, press the "Self-test" button, then the monitor
will start the Self-test program, simulating the overload fault, insulation fault and
over-temperature fault to test whether the detection and judgment function of the instrument to
the main faults is normal. If the monitor can detect the above three kinds of faults, it indicates
that the instrument function is normal.
6.4.2 Button operation of AIM-M200 medical insulation monitor in programming mode
(1) Enter the programming mode
10
Under normal operation conditions, press the "Setting" button to enter into the code input page
of the programming mode. Change the password size by pressing "Up button" or "Down button", and
press "Enter" button after entering the correct password to enter the programming mode.
(2) Exit programming mode
In the programming mode, press the "TEST" key to enter the save confirmation menu, select [Y] or
[N] through the "UP" or "DOWN" key, and then press the "ENTER" key to exit the programming mode.
If [Y] is selected before exit, the parameter settings will be saved; if [N] is selected, the
parameters will not be saved.
(3) System password setting
In programming mode, select [Other Settings] by "Up button" or "Down button", and press "Enter"
button to enter other settings item, then make the password number part reverse video by "Up button"
or "Down button", and press "Enter" button to confirm the modification. At this time you can change
the password value by "Up button" or "Down button", and press "Enter" button to confirm after
modification, then press "Self-test" button to save and exit programming mode. Examples of
operations are as follows:
(4) Alarm parameter setting
Alarm parameters are used to set the parameters of system insulation alarm, current overload alarm
and transformer temperature alarm, which are similar to the steps of "system password setting".
The following only provides examples for setting insulation alarm value, current overload alarm
value and temperature alarm value.The insulation alarm value is set to 50kΩ, and the current alarm
value is set to 14A and the temperature alarm value is set to 70℃. The procedure is as follows:
2012-10-10 12:29:43
R>999 KΩ T=023℃
I = 0.0 A (00%)
ENTER
UP/DOWN Input Password
0000
2012-10-10 12:28:43
R>999 KΩ T=023℃
I = 0.0 A (00%)
Press
MENU
Input Password
0001
Set Comms Set Alarm
Set Clock Set Misc.
Set Comms Set Alarm UP/DOWN
Set Clock Set Misc.
Password: 0001 LCD: 00
B. Light: On Clear:N
Password: 0001 LCD: 00
B. Light: On Clear:N
UP/DOWN Password: 0002 LCD: 00
B. Light: On Clear:N
ENTER Password: 0002 LCD: 00
B. Light: On Clear:N
Set Comms Set Alarm
Set Clock Set Misc.
Save Setting？ UP/DOWN
Y N
UP/DOWN Save Setting？
Y N
Enter
ENTER
TEST
ENTER
11
(5) Communication settings
Communication settings include RS485 communication settings and CAN communication settings.
The RS485 Communication settings include settings of the communication address and communication
baud rate, and CAN communication settings mean to set the communication address, which can also
set whether the instrument is supporting the use of fault locator. The RS485 communication address
is set to 005, and the primary baud is set to 9600bps. The CAN communication address is set to 003,
with a fault locator. Examples of programming are as follows:
Set Comms Set Alarm ENTER
Set Clock Set Misc.
Res :040kΩ Curr:035A
Temp:060℃
UP/DOWN Res :050kΩ Curr:035A
Temp:060℃
Res :050kΩ Curr:035A
Temp:060℃
ENTER
Res : 050kΩ Curr: 035A UP/DOWN
Temp:060℃
ENTER Res : 050kΩ Curr: 035A
Temp:060℃
Res : 050kΩ Curr: 014A
Temp:060℃
UP/DOWN
ENTER Res : 050kΩ Curr: 014A
Temp:060℃
UP/DOWN Res :050kΩ Curr:014A
Temp:060℃
Res :050kΩ Curr:014A
Temp:060℃
ENTER
Res :050kΩ Curr:014A UP/DOWN
Temp:070℃
TEST
save/quit
2012-10-10 12:29:43
R>999 KΩ T=023℃
I = 0.0 A (00%)
2012-10-10 12:29:43
R>999 KΩ T=023℃
I = 0.0 A (00%)
SetComms Set Alarm
Set Clock Set Misc.
ENTER 485 Ad:001 Baud:4800
CAN Ad:001 LOCAT:NO
ENTER 485 Ad:001 Baud:4800
CAN Ad:001 LOCAT:NO
UP/DOWN
485 Ad:005 Baud:4800
CAN Ad:001 LOCAT:NO
485 Ad:005 Baud:4800 ENTER
CAN Ad:001 LOCAT:NO
485 Ad:005 Baud:4800 UP/DOWN
CAN Ad:001 LOCAT:NO
ENTER
485 Ad:005 Baud:4800
CAN Ad:001 LOCAT:NO
UP/DOWN 485 Ad:005 Baud:9600
CAN Ad:001 LOCAT:NO
ENTER 485 Ad:005 Baud:9600
CAN Ad:001 LOCAT:NO
485 Ad:005 Baud:9600 UP/DOWN
CAN Ad:001 LOCAT:NO
ENTER 485 Ad:005 Baud:9600
CAN Ad:001 LOCAT:NO
UP/DOWN 485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:NO
ENTER
485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:NO
UP/DOWN 485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:NO
ENTER 485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:NO
UP/DOWN
485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:YES
ENTER 485 Ad:005 Baud:9600
CAN Ad:003 LOCAT:YES
TEST
save/quit
12
(6) Other parameter settings.
The settings for other parameters include contrast settings, backlight time settings, and
clearing fault records, which are similar to the setting methods of system password settings. Here
is no more descriptions.
7 Communication protocol
7.1 Modbus-RTU communication protocol
7.1.1 Introduction
In seven pieces of products, the communication between the AIM-M200 insulation monitor and the
upper computer uses the Modbus-RTU communication protocol. The Modbus protocol particularly defines
the check code, the data sequences and so on, which are the necessary contents of the specific data
exchange. The Modbus protocol uses a master-slave responsive connection (half-duplex) on a
communication line, which means the signal on a single communication line is transmitted in two
opposite directions. Firstly, the signal from the main computer is addressed to a unique terminal
device (slave computer), and then the answering signal emitted from the terminal device is
transmitted to the host in the opposite direction.
The Modbus protocol only permits communication between hosts (PC, PLC, etc.) and terminal
devices, without allowing the data interchange between independent terminal devices. So that
terminal devices do not occupy communication lines when they are initialized and are limited to
in response to the query signals arriving at the computer.
7.1.2 Introduction to the function code
7.1.2.1 Function code 03H or 04H: Read the registers
This function allows the user to acquire the data collected and recorded by equipment and the system
parameters. The number of data requested by hosts has no limit, but cannot exceed the defined address
range.
The following example shows how to read a measured insulation resistance value from No.01 slave
computer, with the address of the insulation resistance value of 0008H.
The host computer
sends
Send
message
The slave computer
returns
Return
message
Address code 01H Address code 01H
Function code 03H Function code 03H
Start
address
High
byte
00H Bytes 02H
Low byte 08H Register High 00H
13
data byte
Number of
register
s
High
byte
00H
Low
byte
50H
Low byte 01H
CRC check
code
High
byte
21H
CRC check
code
High
byte
74H
Low
byte
75H
Low byte 0CH
7.1.2.2 Function code 10H: Write the registers
The function code 10H allows the user to change the contents of multiple registers, which can write
the time and date in this meter. The host can write up to 16 (32 bytes) data at a time.
The following example shows a preset address of 01 with an installation date and time of 12:00,
Friday, December 1st, 2009, in which the Monday to Sunday are replaced with number 1 to 7.
The host computer sends
Send
message
The slave computer
returns
Return
message
Address code 01H Address code 01H
Function code 10H Function code 10H
Start address
High
byte
00H
Start
address
High
byte
00H
Low
byte
04H
Low
byte
04H
Number of
registers
High
byte
00H Number of
register
s
High
byte
00H
Low
byte
03H
Low
byte
03H
Bytes 06H
CRC check
code
High
byte
31H
0004H
Data to be
written
High
byte
09H
Low
byte
C9H
Low
byte
0CH
0005H
Data to be
High
byte
01H
14
written Low
byte
05H
0006H
Data to be
written
High
byte
0CH
Low
byte
00H
CRC check
code
High
byte
53H
Low
byte
3FH
7.1.3 Parameter address table in medical intelligent insulation monitoring instrument
No. Address Parameter
Read-write
property
Value range Data type
1 0000H Protecting passwords R/W 0001-9999 (Default value is 0001) Word
2
0001H high
byte
RS485 Communication
address
R/W 1~247 (Default value is 1)
Word
0001H low byte RS485 Communication
BPS
R/W 1~4：4800、9600、19200bps(Default
value is 2)
3
0002H high
byte
CAN address R/W 1-110 (Default value is 1)
Word
0002H low byte There is fault
location device or not
R/W 1：yes，0：no (Default value is 0)
4
0003H high
byte
LCD contrast ratio R/W 0-63 (Default value is 0)
Word
0003H low byte Backlight timeout R/W 0: Normally open，1-99（Unit is Min）
5
0004H high
byte
Year R/W 1-99
Word
0004H low byte Month R/W 1-12
6
0005H high
byte
Day R/W 1-31
Word
0005H low byte Week R/W 1-7
7
0006H high
byte
Hour R/W 0-23
Word
15
0006H low byte Minute R/W 0-59
8
0007H high
byte
Second R/W 0-59
Word
0007H low byte Reserve R
9 0008H Insulation resistance R/W 10-999（Unit is KΩ） Word
10 0009H Load current R/W 0-500（Unit is 0.1A） Word
11
000AH Transformer
temperature
R/W 40-140(Unit is℃)
Word
12
000BH high
byte
Fault circuit 1-8
Word
000BH low byte Fault type R Bit0:1 Insulation resistance fault
Bit1:1 Overload fault
Bit2:1 Transformer overheat fault
Bit3:1 L1 or L2 disconnection fault
Bit4:1 PE or KE disconnection fault
Bit5:1 Temperature sensor
disconnection fault
Bit6:1 Current transformer
disconnection fault (preset)
Bit7:1 Device fault
13-1
6
000CH-000FH Preset
17
0010H Insulation resistance
set value
R 10-999（Unit is kΩ）(Default value
is 50)
Word
18
0011H Load current set value R 0-50(Unit is A) (Default value is
35)
Word
19
0012H Transformer
temperature set value
R 0-200(Unit is℃) (Default value is
70)
Word
20-2
3
0013H-0016H Preset
24
0017H high
byte
Preset R
Word
0017H low byte Event control
parameters
The storage event record number of
next event
16
25
0018H high
byte
Event
record 1
Reserve R
Word
0018H low byte STA1 R Event 1 content
26
0019H high
byte
Year1 R Event 1 time -year
Word
0019 low byte Moth1 R Event 1 time -month
27
001AH high
byte
Day1 R Event 1 time -day
Word
001AH low byte Hour1 R Event 1 time -hour
28
001BH high
byte
Minute1 R Event 1 time -minute
Word
001BH low byte Second1 R Event 1 time -second
29-6
4
001CH-003FH
The rules and formats of the remaining 9 event records in this part of space are the
same with event 1.
7.2 CAN communication description
7.2.1 Introduction
Among the seven pieces of products, the aim-m200 insulation monitor, ail150 series fault locator
and asg150 test signal generator form a can communication subsystem. Their address is the same
address, and they are distinguished by identification. The communication rate is 400kbps.
7.2.2 Agreement
Frame
start
Arbitratio
n segment
Control
segment
Data segment
CRC
segment
ACK
segment
Frame end
When the data frame reaches the terminal device, it enters the addressable device through a simple
“port”. The device removes the envelope "envelope" (data header) of the data frame and reads the
data. If there is no data, the task requested by the data is executed. Then, if the returned data
is available, the data generated by itself is packed in the “envelope”, and the data frames are
returned to the sender.
7.2.2.1 Data frame format
7.2.2.2 Frame start
Represent a segment that a frame starts, with dominant of a bit.
The bus wire has two kinds of electrical levels which are “dominant” and “recessive”. When
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executing the line “and” on the bus wire, the logical value of the dominant level is “0”, and
the logical value of the recessive level is “0”. “Dominant” has the meaning of “priority”,
as long as there is a unit outputting dominant level, the bus wire is the dominant level.
“Recessive” has the meaning of “containment”, only when the output of all units is the recessive
level, the bus wire is the recessive level.
7.2.2.3 Arbitration segment
The segment representing the data precedence.
The data frames stipulated in the CAN communication protocol have two formats, which are standard
format and extended format, and the arbitration segments of the two formats are different. Acrel
AIM-M200 insulation monitors uses the standard format, of which the arbitration segment has 11 bits.
It is sent in turn from ID28 to ID18, and prohibits the high 7 bits are all recessive.
7.2.2.4 Control segment
The control segment consists of 6 bits, representing the number of bytes in the data segment,
and the composition of the standard format and the extended format is different.
The Acrel AIM-M200 insulation monitor uses the standard format, consisting of a IDE bit, a
reserved bit, and 4 bits of data-length-code DLC.
Note that the bytes of data must be 0-8 bytes, but the receiver does not consider the case of
9-15 as an error.
7.2.2.5 Data segment
Data segment can contain data of 0-8 bytes, starting with the MSB (Most significant bit).
7.2.2.6 CRC 段
7.2.2.6 CRC segment
The CRC segment is the frame that examines the frame transmission error, consisting of 15-bit
CRC sequences and 1-bit CRC delimiter (the bit used for separation).
CRC sequence is the CRC value generated by the polynomial, and the calculation range of CRC
includes frame start, arbitration segment, control segment and data segment. The receiver calculates
the CRC with the same algorithm and makes comparisons. If any inconsistencies, it will notify the
error.
7.2.2.7 ACK segment
The ACK segment is used to confirm that the reception is normal, consisting of two bits that
are an ACK slot (ACK Slot) and an ACK delimiter.
An ACK is sent in the unit(the sending unit does not send an ACK) which can receive the normal
message and belongs to one of all receiving units that are neither in the bus shutdown nor in
hibernation. A normal message means a message that does not contain a stuff error, a formal error
or a CRC error.
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7.2.2.8 Frame end
The frame end is a segment representing the end of the frame, consisting of 7 recessive bits.
7.2.3 Communication application
In communication, a data frame can be divided into multiple segments with different functions.
Except for the data segment, the meaning of the other segments has been explained in the previous
section, so this section will not explain in detail, and only describes the information of data
segment.
The data bits of the example given in this section are hexadecimal. Data segment takes the format
of the command (function code) + data.
7.2.3.1 Startup command
01 01
Description: When the AIM-M200 insulation monitoring instrument monitors the insulation faults
in the isolated power system, it will issue a startup command to initiate the AIL150-4/8 fault locator.
After receiving this command, the AIL150-4/8 fault locator begins the insulation fault locating.
7.2.3.2 Fault location results return command
04 01
Description: After the AIL150-4 insulation fault locating is completed, the locating results
are sent to the AIM-M200 medical intelligent insulation monitoring instrument.
Other commands will not be repeated here.
7.3 Instrument CAN communication connection and address settings
As shown in 7.2.1, each set of AIM-M200, ASG150 and AIL150 serve as a subsystem formally, while
in practical application, the CAN communication connection and address settings should be conducted
in the following ways.
1) Connect with shielded twisted pair according to the following figure. Note each of the two
terminals of the CAN bus wire should be added a matched resistance of 120Ω.
2) When setting CAN address, in, it is only needed to set the CAN address of AIM-M200 to any
value between 1 to 110 after the 4 meters are on a unified power, then save the value and the CAN
address of ASG150, AIL150 can be simultaneously set the same with address of AIM-M200. In the
confirmation of saving the AIM-M200 CAN address, note whether the communication lights of ASG150
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and AIL150 are flashing several times. If flashing, the address settings are normal, otherwise,
it is needed to check the communication wiring and confirm that the wiring is intact and then reset.
8 Typical applications
8.1 Applications of insulation monitoring and fault locating seven pieces of products in ICU/CCU
Note: The grounding bat in the isolated power supply cabinet should be connected reliably with the
equipotential terminals in the field.
9 Powerup and debugging instructions
9.1 Wiring check
For each set of IT system, the wiring check should be conducted before powerup, mainly checking
whether there is wrong, missed or short connection. The examination can be conducted sequentially
in the following order according to the wiring diagrams shown in section 5.4 of this manual:
1) Check if each seven-piece suite forms a separate IT distribution system, and ensure that the
current, resistance, and temperature signal wirings of each insulation monitor are connected to
the same isolation transformer and IT system composed of it.
2) Check whether the L and N input terminals of each set of the HDR-60-24 power supply module are
connected to the 0 and 230V terminals of primary side of the isolated transformer. Whether the +V
and -V of its 24V output terminal is respectively connected with the No.1(24V) and 2(G) terminals
of AIM-M200, No.1(24V) and 2(G) terminals of ASG150, No.1(24V) and 2 (G) terminals of AIL150-4(or-8),
No.24V and G terminals of AID150, and the positive and negative poles are all correctly connected.
3) Check whether the No.8(I0) and 9(I1) terminals of AIM-M200 in each system are reliably connected
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to the terminals of the transformer AKH-0.66P26 socketed to the secondary side of the corresponding
isolation transformer, and are not grounded. The transformer only passes one of the two lines of
the output terminals of the isolation transformer.
4) Check whether the No.11(T0) and 12 (T1) terminals of AIM-M200 in each system are reliably connected
to the two ST terminals of the isolation transformer.
5) Check whether the No.4 (L1), 5 (L2) terminals of AIM-M200 and No.5 (L1), 7 (L2) terminals of
ASG150 in each of the systems are reliably connected to the two lines of the IT system (that is
the secondary side of the isolation transformer).
6) Check whether the No.13 (FE), 14 (KE) terminals of AIM-M200 in each system are respectively
connected to the on-site equipotential terminals through wires, in the meanwhile the S terminals
of isolation transformer and the No.1 (PE) terminals of ASG150 are reliably connected to the
equipotential terminals.
7) Check whether the No.18 (H), 19 (L) terminals of AIM-M200 meter CAN communication in each system
are respectively connected to the No.8 (H), 9 (L) terminals of ASG150, No.21 (h), 22 (L) terminals
of AIL150-4 (or-8), and the CAH, CAL terminals of AID150 in the way of hand in hand, which are reliable
connections with the positive and negative poles correct.
8) If each isolation transformer has a cooling fan, check whether the cooling fan power supply control
is connected to the No.20, 21 terminals of AIM-M200 in this system.
9) Finally check the two load power lines of each branch in the IT system, and check whether the
two lines pass through the transformer on the AIL-4 (or-8) meter panel by a top-down approach.
9.2 Common faults and eliminations
Make sure the wirings are correct and power on the system. Then check whether each meter is
abnormal, and whether there is a fault alarm in AIM-M200. For common problems, the causes can be
determined and the faults can be eliminated according to the phenomenon of each instrument and the
fault types:
Equipment
name
Fault phenomenon Possible causes and troubleshooting
AIM-M200
insulation
monitoring
Liquid crystal
display：LL
disconnection fault,
No.4 and 5 terminals of AIM-M200 are not reliably
connected to the two lines of the output terminal of the
isolation transformer. Check the wirings and make sure
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instrument and the insulation
indicator is lit.
they are reliably connected.
Liquid crystal
display：FK
disconnection fault,
and the insulation
indicator is lit.
No.13 and 14 terminals of AIM-M200 are not reliably
connected to the equipotential terminals. Check the
wirings and make sure they are reliably connected.
Liquid crystal
display：TC
disconnection fault,
and the overheat
indicator is lit.
No.11 and 12 terminals of AIM-M200 are not reliably
connected to the two ST terminals of the isolation
transformer. Check the wirings and make sure they are
reliably connected.
Liquid crystal
display: insulation
fault, and the
insulation indicator
is lit.
At least one of the two lines in the IT system at the
secondary side of the isolation transformer has a
grounding fault, after elimination it can be restored to
normal.
The instrument is not
lit.
The 24V power supply of AIM-M200 is not connected well.
Check the wirings of No.1 and 2 terminals and make sure
they are reliably connected.
Note: If the above faults occur, interrupt the power to troubleshoot, and adjust the wirings
until everything is normal.
9.3 Settings and debugging
1) After the system is powered on, set the AIM-M200 load current alarm value according to the capacity
of the isolation transformer. The corresponding relations between alarm current and isolation
transformer capacity are: 45A---10kVA, 35A---8kVA, 28A---6.3kVA, 14A---3.15kVA. After you set up,
follow the process step by step to exit and save the setting parameters. The default alarm current
value of the instrument is 35A, if the matching transformer is 8kVA, then this parameter does not
need to be set.
2) Open the AIM-M200 fault locating function. Enter the AIM-M200 communication settings menu and
set the LOCAT item to YES, then quit and save to start this function.
3) Address settings. To ensure the realization of fault location function, it is necessary to set
the can communication address of aim-m200, and set the can communication address of asg150 and ail150
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through this operation. Before setting, make sure that the CAN bus wiring of aim-m200, asg150, ail150
and other products in the same it system is correct, and a 120 Ω matching resistance is added at
the end (the resistance must be added, otherwise communication may not be possible). You can also
connect the ail150 to the head or end of the CAN bus, and turn all its dial switches to the "1"
position). Power on the system, enter the communication setting menu of aim-m200, set the can
communication address, press enter to confirm, press self check to return and save. If the
communication indicators of asg150 and ail150 flash during the saving process, the can communication
address of asg150 and ail150 is also set successfully. The number of addresses is recommended to
start at 1.
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Headquarters: Acrel Co., LTD.
Address: No.253 Yulv Road Jiading District, Shanghai,China
TEL.: 0086-21-69158338 0086-21-69156052 0086-21-59156392 0086-21-69156971
Fax: 0086-21-69158303
Web-site：www.acrel-electric.com
E-Mail: ACREL008@vip.163.com
Postcode: 201801
Manufacturer: Jiangsu Acrel Electric Appliance Manufacturing Co., LTD.
Address: No.5 Dongmeng Road,Dongmeng Industrial Park, Nanzha Street, Jiangyin City,Jiangsu
Province,China
TEL/Fax: 0086-510-86179970
Web-site：www.jsacrel.com
E-Mail: JY-ACREL001@vip.163.com
Postcode: 214405
