ABB IRC5P, Product Manual, Page: 81 / 220

5 Installation and Commissioning
Product Manual, Control Cabinet IRC5P 3HNA009834-001 en Rev.06 81
5.5 Cabin Safety System Connections
5.5.4 High Voltage Interlock
General
The high voltage interlock chain is used to prevent personnel from entering the
cabin when the high voltage is ‘on’.
Description
The personnel hazard related to the high voltage is accomplished by installing either
a manual interlock switch or a switch function controlled by the plant’s safety
supervision system, a PLC, cabin door, etc. The manual high voltage interlock
switch is typically used when the robot is supplied without main panel (or remote
panel) or if the high voltage interlock switch is not installed on the panel.
Following conditions must be present to close the high voltage interlock chain.
– High voltage interlock chain must be closed.
– Cabin interlock chain must be closed. (Cabin ventilation fans must be running).
– The emergency stop- and enable chain must be closed.
– Robot must be purged (purge relay must be closed).
Installation
To install the High Voltage Interlock switch, install a 2 pole switch at terminals
marked ‘High Voltage Interlock’ (for chain 1 and 2) in connector SCB-X13 pin 3-6
as shown in Figure 34 and in principle diagram in Figure 35 . The switch must be of
a Normal Open fail safe type which will be opened to switch off the high voltage.
The switch must comply with ’Safety System Standards’ on page 65.