Acrel AIM-M300 User manual

627
Medical IT System Insulation Monitoring and Fault Locating
Devices
(Six-Piece Set)
Installation and Operation Manual V1.0
Acrel Co., Ltd.

Declaration
Please read this manual carefully before using these series of products. In this
manual, all 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;
Transformers and related insulation monitors are professional electrical equipment,
and any relevant operation needs to be carried out by specialized electrical technicians.
Acrel does not take responsibility for personal injuries or economic losses caused by
improper operations of non-professionals.
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.

Table of Contents
1 Introduction ....................................................................................................................................... 1
2 Function features ............................................................................................................................. 3
2.1 Function features of AITR series medical isolation transformer ....................... 3
2.2 Function features of AIM-M300 series medical intelligent monitoring device
........................................................................................................................................................... 3
2.3 AIL150-4/AIL150-8/AIL160-6 insulation fault locator ............................................. 3
2.5 Function features of AID150 centralized alarm and display device ................... 3
2.6 Function features of HDR-60-24 power supply device ............................................... 4
2.7 Function features of AKH-0.66P26 current transformer ........................................... 4
3 Reference standard ........................................................................................................................... 4
4 Technical parameters ....................................................................................................................... 5
4.1 Technical parameters of AITR series medical isolation transformer ................. 5
4.2 Technical parameters of AIM-M300 series medical intelligent insulation
monitoring device ......................................................................................................................... 6
4.3 Technical parameters of AIL150-4/AIL150-8 /AIL160-4test signal generator ... 7
4.4 Technical parameters of AID150 centralized alarm and display device ............. 7
4.5 Technical parameters of HDR-60-24 power supply device ......................................... 8
4.6 Technical parameters of AKH-0.66P26 current transformer ..................................... 8
5 Installation and wiring ................................................................................................................. 8
5.1 Shape and cut-out ................................................................................................................. 8
5.2 Installation ......................................................................................................................... 11
5.3 Wiring method ....................................................................................................................... 13
5.4.1Typical wiring diagram ................................................................................................... 16
5.5 Note ......................................................................................................................................... 18
6 Programming and application ....................................................................................................... 19
6.1 Panel description ............................................................................................................... 19

6.2 LED indicator instructions ............................................................................................. 20
6.3 Button function descriptions ......................................................................................... 21
6.4 Button operation descriptions ....................................................................................... 22
7 Communication protocol ................................................................................................................. 27
7.1 Modbus-RTU communication protocol ............................................................................... 27
7.2 CAN communication description ....................................................................................... 31
8 Typical applications ..................................................................................................................... 34
8.1 Applications of insulation monitoring and fault locating six pieces of products
in ICU/CCU ..................................................................................................................................... 34
9 Powerup and debugging instructions ......................................................................................... 35
9.1 Wiring check ......................................................................................................................... 35
9.2 Common faults and eliminations ..................................................................................... 36
9.3 Settings and debugging ..................................................................................................... 37

1
Medical IT System Insulation Monitoring and Fault Locating Devices
1 Introduction
The medical IT system is mainly used in important Class 2 medical locations such as operating
room, ICU/CCU intensive care unit, providing safe, reliable and continuous power distribution for
the important equipment at these locations. Medical insulation monitoring and fault locating device
is developed by Acrel with many years’ design experience, according to the special requirements
of the insulation monitoring and fault locating of the power distribution system in Class 2 medical
locations. The products can realize the real-time monitoring of insulation, load and temperature
of isolation transformer in IT system, and have the functions of system insulation fault locating
and centralized monitoring by multiple pieces of systems.
Medical IT system insulation monitoring and fault locating products (Six-piece set) include
AITR series medical isolation transformer, AIM-M300(or AIM-M300/SG) medical intelligent insulation
monitoring device, AKH-0.66P26 current transformer, AIL150-4/AIL150-8 /AIL160-6 insulation fault
locator, HDR-60-24 power module and AID150 centralized alarm and display device, which are shown
in Table 1.
Table 1 Medical IT System Insulation Monitoring and Fault Locating Products
Name and type Product picture Description
AITR series medical
isolation
transformer
AIT
R series isolation transformer is specially
used in medical IT system. The windings are treated
with double insulation and have electrostatic
shielding layer, which reduces electromagnetic
interference between windings. The PT100
temperature sensor is inst
alled in the wire bag to
monitor the temperature of transformer. The whole
body is treated with vacuum invasion paint, which
increases mechanical strength and corrosion
resistance.
AIM-M300 series
medical intelligent
insulation monitor
AIM-M300 series
medical intelligent
monitoring device
adopts advanced microcontroller
technology, which has high integration, compact
size, convenient installation and integrates
intelligence, digitalization and networking in one.
It is suitable for insulation monitoring
of
isolation power system in Class 2 medical locations

2
such as operating room and intensive care unit.
AKH-0.66P26 current
transformer
The AKH-
0.66P26 type current transformer is the
protective current transformer
supporting the
AIM-M300 series insulat
ion monitor, of which the
maximum measurable current is 60A and the
transformation ratio is 2000:1. The current
transformer is directly fixed inside cabinet by
screwing, and the secondary side is leaded out by
the terminal, which is convenient to install a
nd
use.
AIL150-4/AIL150-8
/AIL160-6 insulation
fault locator
AIL150-4/AIL150-8 /AIL160-6
insulation fault
locator adopts high sensitivity transformer
combined with high precision signal detecting
circuit, which detects the signal inject in
the
system from AIM-M300/SG
and accurately locates the
circuits which have insulation faults.AIL150-
4
insulation fault locator can locate the insulation
faults of 4 loops, AIL150-
8 insulation fault locator
can locate 8 loops, and AIL160-6 locate 6 loops.
HDR-60-24 power
module
HDR-60-24 DC
power supply can provide 24V DC
power supply simultaneously for AIM-M300 series
medical intelligent insulation monitoring device
,
AIL150 and AIL160
series insulation fault locator
and AID150 centralized alarm and display
device.With
high capacity, stable voltage output
and convenient installation, the module meets
the
power-supply requirements of the above-
mentioned
meters and is the recommended power supply product.
AID150 centralized
alarm and display
device
AID150 centralized alarm and display device
adopts the LCD liquid crystal display and achieves
data exchange with AIM-M300 series
medical
intelligent insulation monitoring device
through
RS485 communication interface, which can real-
time

3
monitor multi-channel data of AIM-M300 series
medical intelligent insulation monitoring device.
2 Function features
2.1 Function features of AITR series medical isolation transformer
 The transformation ratio between the primary and secondary windings is 1:1.
 Double insulation treatment is adopted between the windings, and the electrostatic shielding
layer is designed.
 The PT100 temperature sensor is installed in each wire packet to monitor the temperature of
the isolation transformer.
 Used for the transformation of TN system into IT system (ungrounded system) after isolation
transformer.
2.2 Function features of AIM-M300 series medical intelligent monitoring device
 Functions of real-time monitoring and fault alarming of the grounding insulation resistance,
transformer load current and transformer winding temperature of the monitored IT system;
 Locating current injector for insulation fault location systems;
 Real-time monitor the line disconnection fault, current sensor disconnectiobn,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
device, insulation fault locator and upper computer management software communications, and
monitoring 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.
2.3 AIL150-4/AIL150-8/AIL160-6 insulation fault locator
 The CAN bus technology is used to exchange data with other equipment.
 Cooperate with AIM-M300/SG to realize fault locating function, in which the AIL150-4 locates
4 channels , AIL150-8 locates 8 channels. And AIL160-6 locates 6 channels in all.
2.5 Function features of AID150 centralized alarm and display device
 Remotely monitor the real-time operation conditions of up to 16 pieces of systems, and the main
interface displays whether the communication is connect or not;

4
 Remotely setting the insulation resistance alarm value, load current alarm value and transformer
temperature alarm value of each system insulation monitoring device, and remotely activated
self-test of the insulation monitor.
 When insulation faults, overload, excessive temperature rise of the transformer or wiring faults
occured in any of the monitored system, centralized alarm and display device will provide
corresponding audible and visual alarm signals, and can manually mute the alarm sound.
 Events logging function, which is convenient for operation personnel to analyze the operation
conditions of system and promptly eliminate the faults, and can save maximum of 20 latest
records;
2.6 Function features of HDR-60-24 power supply device
 AC 220V input, DC 24V output, with max output power of 60W;
 Used for the DC 24V power supply for AIM-M300 series medical intelligent insulation monitoring
device, AIL150/AIL160 series insulation fault locator, AID150 centralized alarm and display
device and other devices.
2.7 Function features of AKH-0.66P26 current transformer
 The maximum measurable current is 60A, and the transformation change ratio is 2000:1;
 Work with the AIM-M300 series insulation monitoring device to measure the load current of
isolation transformer.
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 ;
◆ IEC 61557-9-2014 Electrical safety of low voltage distribution system below AC 1000V and DC
1500V, Test, measurement or monitoring equipment for protection test section 9: insulation fault
positioning equipment 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

5
16: Special requirements for isolation transformers for power supply in medical locations .
4 Technical parameters
4.1 Technical parameters of AITR series medical isolation transformer
Refer to Table 2.
Table 2 Technical Parameters of AITR Series of Medical Isolation Transformer
Type AITR10000S AITR8000S AITR6300S AITR5000S AITR3150S
Insulation class H H H H H
Protection class IP00 IP00 IP00 IP00 IP00
Power /Voltage /Current
Rated power 10000VA 8000VA 6300VA 5000VA 3150VA
Rated frequency 50-60Hz 50-60Hz 50-60Hz 50-60Hz 50-60Hz
Rated input voltage AC230V AC230V AC230V AC230V AC230V
Rated input current 45.3A 36A 28.5A 22.5 14.2A
Rated output voltage AC230V/115V AC230V/115V AC230V/115V AC230V/115V AC230V/115V
Rated output current 43.5A 34.7A 27.4A 21.7 13.7A
Inrush current <12In <12In <12In <12In <12In
Leakage current <200μA <200μA <200μA <200μA <200μA
No load input current 1.359A 1.08A 0.855A 0.675A 0.426A
No load output voltage 235V±3% 235V±3% 235V±3% 235V±3% 235V±3%
Short circuit voltage <6.9V <6.9V <6.9V <6.9V <7.5V
General parameters
Fuse wire 80A 63A 50A 35A 25A
Primary winding
resistance
<55mΩ <64mΩ <80mΩ <131 mΩ <245mΩ
Secondary winding
resistance
<45mΩ <64mΩ <80mΩ <116 mΩ <228mΩ
Iron loss <150W <105W <107W <77W <55W
Copper loss <230W <200W <170W <125W <120W
Efficiency >96% >96% >96% >96% >95%
Maximum ambient
temperature
<40℃ <40℃ <40℃ <40℃ <40℃
No-load temperature
rise
<36℃ <33℃ <31℃ <26℃ <22℃
Full load temperature
rise
<65℃ <76℃ <67℃ <62℃ <55℃
Noise grade <40dB <40dB <40dB <40dB <40dB

6
4.2 Technical parameters of AIM-M300 series medical intelligent insulation monitoring device
Refer to Table 3.
Table 3 Technical Parameters of AIM-M300 series Medical Intelligent Insulation Monitoring
AUX Power Voltage DC 18…36V
Temperature
monitoring
Thermal
resistor
2 Pt100
Power
consumption
≤6W Measuring
range
-50…+200℃
Insulation
monitoring
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
≤5uA Relative
humidity
5%-95%，No
condensation
Impedance Zi ≥200kΩ Altitude ≤2500m
Internal DC
resistance Ri
≥240kΩ IP degree
IP40
Permissible
extraneous DC
voltage Ufg
≤DC280V
Rated impulse voltage /
pollution degree
4KV/Ⅲ
Load Measuring Value 2.1…60A EMC/EMR IEC 61326-2-4

7
current
monitoring
Alarm Value 5…60A
Communication protocol
CAN，customize
Measuring
accuracy
±5% RS485，Modbus-RTU
Locatingnote Measuring voltage ±12V Measuring current ≤50μA
Note: AIM-M300 insulation monitoring device doesn’t support locating function. When need fault
locating function, please select AIM-M300/SG.
4.3 Technical parameters of AIL150-4/AIL150-8 /AIL160-4test signal generator
Refer to Table 4.
Table 4 Technical Parameters ofAIL150-4/AIL150-8/AIL160-6
Item
Technical parameters
AIL150-4/AIL150-8/AIL160-6
Auxiliary
power supply
Voltage DC 18…36V
Maximum power consumption ≤2VA
Monitored
system
Rated voltage 0…242 VAC
Rated frequency 45… 60Hz
Fault locating
Maximum circuit 4,8,6 Loops
Response time ≤5s
Communication
Mode CAN communication
Protocol Self-defined protocol
4.4 Technical parameters of AID150 centralized alarm and display device
Refer to Table 5.
Table 5 Technical Parameters of AID150 Centralized Alarm and Display Device
Type
Parameters
AID150
AUX POWER
Voltage DC 24V
Power consumption ≤0.6W
Insulation Resistance Display Range 0…999kΩ
Insulation alarm range 50…999kΩ
Transformer Output Current Display Percentage
Current alarm range 14A、18A、22A、28A、35A、45A
Temperature alarm range 0…+200℃
Alarm mode Audiable and visible alarm

8
Alarm type Insulation fault, overload, and over temperature
Communication mode RS485,MODBUS-RTU
Display mode LCD display，128*64 dot array
4.5 Technical parameters of HDR-60-24 power supply device
Refer to Table 6.
Table 6 Technical Parameters of HDR-60-24 Power Supply Device
Type Input Output Installation
HDR-60-24 100-240VAC 1.8A 24VDC 2.5A 35mm DIN-rail
4.6 Technical parameters of AKH-0.66P26 current transformer
Refer to Table 7.
Table 7 Technical Parameters of AKH-0.66P26 Current Transformer
Input current
0.05A～60A Frequency
range
0.02-10 kHZ
Output current 0.025～25 mA Loading
resistance
<200Ω
Temperature
coefficient
100 ppm/℃ Transient
current (1s)
200A
Phase
displacement
10 Installation Fixed with 4×10 screws
Operating
temperature
-35～+70℃
Secondary
wiring
Single core >0.75mm2,
Maximum
length of 1 meter
Storage
temperature
-40～+75℃ Single core twisted pair,
0.75mm2, Maximum length of
10 meters
Secondary
resistance range
95～120Ω Isolation
pressure
5000Vac
Accuracy 0.5% Linearity 0.5%
5 Installation and wiring
5.1 Shape and cut-out
5.1.1 Dimensions of AITR series medical isolation transformer (unit: mm)
Dimensions of AITR series medical isolation transformers are shown as below and in Table 9 (unit:
mm)

9
Dimensions of AITR series medical isolation transformer
Table 9 External Dimensions of AITR Series Medical Isolation Transformer
Type Capacity (VA)
A(mm)
B(mm) C(mm) D(mm) E(mm) F(mm)
Total weight
AITR10000S 10000 280 236 421 240 190 11*18 86±5
AITR8000S 8000 280 236 421 240 190 11*18 79±5
AITR6300S 6300 280 221 421 240 175 11*18 69±5
AITR5000S 5000 280 211 421 240 175 11*18 62±5
AITR3150S 3150 280 211 421 240 175 11*18 49±5
5.1.2 Dimensions of AIM-M300 series medical intelligent insulation monitoring device (unit: mm)
Front view Side view
5.1.3 Dimensions of AIL150-4/AIL150-8 /AIL160-6 insulation fault locator (unit: mm)
AcrelAcrelAcrelAcrelAcrelAcrel
AIL150-4
On Comm
L1
L2
L3
L4
L1 L2 L3 L4
Front view Side view

10
Front view Side view
Note: AIL150-4 and AIL150-8 these two types take the same product shell, so their external
dimensions are exactly the same.
5.1.4 Dimensions of AID150 centralized alarm and display device (unit: mm)
Acrel
On Comm
AID150
Test
Mute Menu
Front view Side view Hole size
5.1.5 Dimensions of HDR-60-24 power module (unit: mm)
Front view Side view
5.1.6 Dimensions of AKH-0.66P26 current transformer (unit: mm)

11
φ2.3
I
Front view Bottom view
5.2 Installation
Medical IT system insulation monitoring and fault locating device six pieces of products are
preferably installed in the distribution cabinet (isolation power cabinet) except for the AID150
centralized alarm and display device. The isolation transformer is installed in the bottom of the
cabinet fixed with matching bolts, and the cooling fan should be installed. The device and the circuit
breaker are installed on the upper panel. If the isolation transformer is installed separately,
it is not suitable to put it too far away from the AIM-M300 series insulation monitor. If the AID150
centralized alarm and display device is used in the operation room, it can be embedded in the wall
of the operating room next to the intelligence panel, so that the medical staff can view conveniently.
If it is used in ICU/CCU and other intensive care units, it should be installed in the nurses station,
so that the duty nurses can view. AID150 external wirings include two 24V power cords and a RS485
communication line of two-core shielded twisted pair, which are all drawn from the isolation power
cabinet. Pay attention to reserve pipelines during construction.
5.2.1 Installation of AIM-M300 series medical intelligent insulation monitoring device
AIM-M300 series insulation monitor adopts the installation method of the DIN-rail, and the
fixation mode is the clip buckle type, as shown in the following figure:
5.2.2 Installation mode of HDR-60-24 power module
The HDR-60-24 power module adopts the installation method of the guide rail, and the fixation
mode is the clip buckle type, which can also be installed on the same guide rail as AIM-M300 insulation

12
monitor.
5.2.3 Installation mode of AIL150-4/AIL150-8 /AIL160-6insulation fault locator
AIL150-4/AIL150-8/AIL160-6 adopts the installation method of the DIN-rail, and the fixation
mode is the clip buckle type, as shown in the following figure:
Each branch of IT system must pass through each transformer of the AIL150/AIL160 and then
connects to the load, the AIL150/AIL160 should be near the output terminal of each branch during
the installation to facilitate the wiring.
5.2.5 Installation mode of AID150 centralized alarm and display device
1) If you choose to embed the wall for installation, the installation diagram is as follows:
1.Product shape 2.Size of wall
openings
3.Insert the shell
into the wall
5.Fixed LCD board
and Shell
4.Connect to the
LCD board through
the terminal
Attention：
As our products
are constantly
updated, this
drawing is for
reference only
until it has been
confirmed by the
relevant
personnel.
Acrel
Run Comm Error Alarm
AID150
TEST
MENU
During the decoration, firstly the AID150 shell should be embedded in the wall to be fixed and be
close to the knockouts of the pipeline, so that the wires (two power cords + a two-core shielded
twisted pair) can be drawn to the front cover, and then fix the cover on the shell with screws.
2）If you choose to install AID150 by opening the cabinet door, the cut-out size is as follows:
35mm DIN- rail
Clip buckel

13
AID150 shape Separate the product
body from the cassette
Install the cassette on
the door panel
Hole size of door
panel
Screw Clasp
Fix the panel to
the cassette
Screw
Attention：
As our products
are constantly
updated, this
drawing is for
reference only
until it has
been confirmed
by the relevant
personnel.
5.3 Wiring method
5.3.1 Wiring mode of AITR series medical isolation transformer
The input terminals at the transformer terminal blocks are labeled with “PM”, in which two
terminals 0 and 230 are connected to the input 220V single-phase AC. The output terminals are labeled
with “SEC”, in which the output voltage of two terminals 0 and 230 is AC 220V and is connected
to external field load. The S terminal is connected to the PE bus bar on the spot (or the equipotential
terminal line). Two ST terminals are temperature sensor interfaces, which are respectively connected
to the No.11 and 12 terminals of AIM-M300 series insulation monitoring device.
Figure 2 AITR series medical isolation transformer terminal blocks diagram

14
Note: The wirings of input and output terminals of the isolation transformer should select the copper
wires matching the line diameter based on the isolation transformer rated input and output current
(refer to tables in section 5.4). S terminal wiring can select 2×2.5mm2 yellow-green wire. The
wiring of two ST terminals can select 2×1.5mm2 shielded twisted pairs, and the wiring should not
be too long.
5.3.2 Wiring mode of AIM-M300(or AIM-M300/SG)
24V, G for the auxiliary power supply, and L1, L2 are connected to the IT system (which can
be 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. 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 AIL150/AIL160 series insulation fault locator and
AID150 centralized alarm and display device), 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 device to the 24V

15
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 2×1.5mm2 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.
5.3.3 Wiring mode of AIL150-4/AIL150-8 insulation fault locator
Upper row terminals (1-2): 24V, G are auxiliary power supply. Lower-row terminals (21-24,28): H,
L are CAN communication terminals (used for communication terminals connection with medical
intelligent insulation monitor, centralized alarm and display device, and test signal generator).
Lower-row terminals (23,24,28): F1, F2,F3 are used for the loop expansion function of insulation
fault locator. When the number of circuits needed to located is beyond 8 in one set of IT system,
you can simultaneously use three (and three at most) AIL150 series insulation fault locators. When
expanding the second insulation fault locator, the wiring of terminals F1 and F2 needs to be short
circuited; when expanding the third insulation fault locator, the wiring of terminals F1 and F3
should be short circuited. After short circuit connection, the number of branches located by the
second fault locator becomes 9-12 (AIL150-4), or 9-16 (AIL150-8); the number of branches located
by the third fault locator becomes 17-20 (AIL150-4), or 17-24 (AIL150-8).
5.3.4 Wiring mode of AIL160-6 insulation fault locator
The wiring of AIL160-6 is showed as follow, terminals (1-2): 24V, G are auxiliary power supply.
Terminals (21-22): H, L are CAN communication terminals and their expansion terminals.
1 2 21 22
LHG
21 22
H L
In order to ensure the normal operation of CAN communication, the CAN interface of each device
needs to be connected by a hand in hand approach, at the same time, the head and end of the
communication bus wire should be connected with a 120Ω matching resistor. The AIL150/AIL160 series

16
insulation fault locator can connect the built-in matching resistors to the bus wire in parallel
through the dial code switch. When the CAN communications of each device are connected hand in hand,
the AIL150/AIL160 can be placed on the head or end of the CAN bus wire, the two dial code switches
of AIL150 should be dialed to position 1 (that means the top), for AIL160, NO.1 and 2 code switches
dialed to position ON, thus the 120Ω matching resistors can be added to ensure smooth communication.
If the AIL150/AIL160 is at the end of the CAN bus wire, the two dial code switches should be dialed
to the position 0 (or OFF) to disconnect the matching resistors.
5.3.5 Wiring mode of AID150 centralized alarm and display device
A and B terminals are connected with A and B in the lower terminal of AIM-M300. The terminals of
the power supply correspond to the positive pole and ground of the 24V DC power supply respectively.
The wiring diagram is shown in the following figure.
Auxiliary power supply RS485 communication
The 24V power supply can be connected by multiple copper wires of 2 x 1.5mm2, and the RS485
communication terminal can be connected by shielded twisted pair of 2 x 1.5mm2.
5.4.1Typical wiring diagram
自 检 菜 单
Note:
1) The connection line diameter of the input and output of the isolation transformer should match