Chapter 3 Electrical Installation 11
EV3200 Door Control Inverter User Manual
2. Selection of control cables
Generally, the control cables should be shield cables, and the shield must be connected to the metal enclosure of the inverter
by cable clamps at both ends.
3. Control cables, power cables and motor cables should be installed separately
Adequate clearance should be left between the cables, especially when the cables are laid in parallel and long. If the signal
cables have to cross over the power cables, keep them vertical to each other, as shown in Figure 3-9.
Power source
or motor cable
Motor cable
Signal/control cable
Power cable
>50cm
>30cm
>20cm
Signal/control cable
Figure 3-9 Wiring requirements
4. Installation requirements of relay, contactor and electro-magnetic braking kit, which may generate great interference, should
be installed outside of the inverter and installed with surge suppressors.
The suppressors are generally varistor, RC filter or diode as illustrated in Figure 3-10.
220Vac
Varistor
Relay
output
220Vac
RC-filter
Diode
+24Vdc
+
-
Method 1
Method 2
Method 3
Figure 3-10 Relay, contactor and brake device