11
Option description and instructions
3ADW00050Q957 Prevention of unexpected start-up en c
Hardware settings
Appropriate hardware settings have been preset at the factory for the safety function.
The reset is preset to manual.
Use the switch (1) to change settings
between automatic reset (2) and manual
reset (3).
Power cycle (power off and on) the safety
relay when a setting has been changed.
Wiring
One POUS button and one reset button need to be installed and wired to the drive at the factory. There
must be double contacts in the POUS button and double wiring (two-channel connection) between the
button and the POUS safety relay [A65]. The safety relay detects cross faults and faults across one
contact from the POUS button.
If needed, install additional POUS buttons on site and wire them to the appropriate terminal block
inside the drive cabinet. See the circuit diagrams delivered with the drive. Follow the rules below:
1. Use only double-contact buttons approved for the POUS circuits.
2. Connect the POUS buttons with two conductors (two-channel connection).
Note:
Keep the channels separate. If you use only one channel, or if the first and second channels are
connected together (for example, in a chain), the cross fault detection of the POUS safety relay trips
and activates the POUS command of the drive as it detects a redundancy fault.
3. Use shielded, twisted pair cable. We recommend a double-shielded cable and gold plated contacts in
the POUS button.
4. Ensure that the sum resistance for one channel (loop resistance) does not exceed 1 k
Ω
.
5. Follow the general control cable installation instructions given in the drive hardware manual.
You can also install additional reset buttons and indication lamps for the POUS circuit on site. We
recommend gold-plated contacts in the reset button. Wire the buttons to the appropriate terminal
block inside the drive cabinet. See the circuit diagrams delivered with the drive.
Follow the rules below:
1. Sum resistance of the external reset circuit may not exceed 1 k
Ω
.
2. Follow the general control cable installation instructions given in the drive hardware manual.
