User Manual of EM730/EM730E Series Inverter
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A-
Inverter
A+
GND
+ term inal - term inal
A-
Inverter
A+
GND
A-
Inverter
A+
GND
A-
Inverter
A+
GND
S1
OFF
S1
OFF
S1
OFF
S1
ON
GND
RS485
communication
interface of host
Fig. 3-17 Wiring of Communication Terminals of Multiple Inverters
Connection to the host via RS485/RS232 adapter for communication:
A-
Inverter
A+
GND
RS485/RS232
adapter
RS232
communicatio
n interface of
host
S1
ON
Fig. 3-18 Communication Terminal Wiring
3.3.8
Wire and screw dimensions of control circuit
In order to reduce the interference and attenuation of the control signal, the control
signal connection cable should be less than 50 m long, and the distance between the
control signal connection cable and power line should be greater than 30 cm. Use the
twisted-pair shielded cable when analog signals are externally inputted.
It is recommended to use the wire with a diameter of 0.5-1 mm
2
in the control circuit.
The terminal block of the EM730/EM730E series inverter is composed of
through-type control circuit terminals. Install it with the PH0 Phillips screwdriver. The
tightening torque should be 0.5N.m.
3.3.9
Precautions for control circuit wiring
Connect the control circuit connection wires and other wires separately.
Connect the control circuit terminals EA, EB, EC, and Y1 separately from other
control circuit terminals.
In order to avoid malfunction caused by interference, use the twisted shielded cables
