Electrical Installation
‑172‑
Figure 8‑53 PG card installation screws
Requirements on wiring of I/O signal cables
● I/O signals include analog input (AI) signals, analog output (AO) signals, digital
input (DI) signals, digital output (DO) signals, and relay output signals. Before
wiring the I/O terminal, disconnect the main power supply and ensure that the
danger indicator on the AC drive is off.
● To avoid interference to the I/O signals, separate the I/O signal cables at least 30
cm from the main circuit cables (R, S, and T cables and U, V, and W cables) and
other power cables (or power supply cables).
● Route relay output cables and other I/O signal cables through different routes with
a clearance of at least 30 cm. Failure to comply will result in malfunction of the
drive and the machine.
8.4.4 Cable Routing Requirements
● Routing signal cables and power cables through different routes
When analog signals are used for remote control on the AC drive cabinet, separate
signal cables from high‑voltage circuits (power supply input, drive unit output, and
braking resistor cables) by a distance of above 50 cm. This is used to reduce
interference from the AC drive and other equipment to analog signals. Comply
with the preceding wiring requirements even in the control cabinet.
● Analog control signal cables
Use shielded twisted pair cables for the analog control signal cables. Minimize the
length of the stripped part of the cable (about 5–7 mm) and wrap the shield with
the insulation tape to prevent the shield from coming into contact with other
equipment and incurring interference.
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