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wiring, the method of hand-in-hand (that is, after the communication line of the previous device
is connected to the communication terminal of this device, it is led out from the terminal of this
device and connected to the communication terminal of the following device). The head and end of
the CAN bus One matching resistor shall be connected in parallel between the two communication
terminals. The recommended resistance value is 120 Ω. Terminals 13 and 14 of AIM-M300(or AIM-M300/SG)
are RS485 communication terminals, which are used to communicate with AID150.
5.5 Note
(1) Medical IT system insulation monitoring and fault locating six pieces of products should be
centrally installed in the isolation power cabinet except for AID150. If the field space is limited ,
the isolation transformer can be installed separately, but should not be too far away from the
insulation monitor and the 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 device and tighten the screws to avoid the abnormal work conditions of device caused
by loose connection.
(3) The grounding wire of the device 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-M300 series medical intelligent insulation monitoring device 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）Special reminder:
Any isolation transformer will have an inrush current when it starts, and too large inrush current
may cause the
circuit breaker at primary side of the transformer difficult to switch or sh. 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 standard requirements. If choosing the circuit breaker with overload protection, the circuit
breaker should conform to the C and D tripping curves and the rated current of the circuit breaker
should be determined according to the capacity of the isolation transformer as follows: 10kVA-63A,
