Electrical installation
Contents of this chapter
This chapter describes the wiring of the safety option done at the factory and contains
guidelines for making user connections (if any).
Wiring
One emergency stop button and one reset button are installed on the cabinet door and
wired to the drive at the factory. There are double contacts in the emergency stop button
and double wiring (redundant two-channel connection) between the button and the
emergency stop safety relay [A61]. The safety relay detects cross faults and faults across
one contact from the emergency stop button.
If necessary, install additional emergency stop buttons on site and connect them to the
applicable terminal block inside the drive cabinet. See the circuit diagrams delivered with
the drive. Obey these general rules:
1. Use only double-contact buttons approved for emergency stop circuits.
2. Connect the emergency stop buttons with two conductors (two-channel connection).
Keep the channels separate.
Note: If you use only one channel, or if the channels are connected together, the cross
fault detection of the emergency stop relay detects a redundancy fault and activates
the fault reaction function.
3. Use shielded, twisted pair cables. ABB recommends double-shielded cable and
gold-plated contacts in the emergency stop button.
4. Make sure that the sum resistance for one channel (loop resistance) is not more than
1 kohm.
5. Obey the general control cable installation instructions given in the drive hardware
manual.
4
Electrical installation 27
To Next Page
Loading...
