Electrical Installation
‑140‑
■ To use the internal 24 V power supply of the AC drive, short pins 2 and 3 of the
jumper J1 on the control board of the AC drive (to short OP1 and COM), and
connect +24V of the AC drive to the power terminal of the external controller.
■ To use the external power supply, short pins 2 and 3 of the jumper J1 on the
control board of the AC drive (to short OP1 and COM) and connect COM of the
AC drive to 0V of the controller. Connect +24V of the external power supply to
the applicable DI terminal through the control contact on the external
controller.
Wiring for DO terminals
When a DO terminal needs to drive a relay, connect a snubber diode across the relay
coil. Otherwise, the 24 V DC power supply may be damaged. Ensure that the driving
capacity does not exceed 50 mA.
Figure 7‑40 Wiring for a DO terminal
Note
Ensure correct direction of electrodes when installing the snubber diode. Failure to comply
may result in burnout of the 24 VDC power supply upon output from the digital output
terminal.
Wiring for relay output terminals
All inductive loads (relays, contactors, and motors) cause voltage spikes when the
current is cut off. To minimize the interference at cutoff, connect a voltage dependent
resistor to the relay contact and connect absorption circuits such as voltage
dependent resistors, RC absorption circuits, and diodes to other inductive loads, as
shown in "
Figure 7–41 Anti‑interference treatment for relay output terminals
"
on page
141
.
To Next Page
Loading...
