5 Installation and Commissioning
5.5 Cabin Safety System Connections
80 3HNA009834-001 en Rev.06 Product Manual, Control Cabinet IRC5P
5.5.3 Cabin Interlock
General The purpose of the cabin interlock chain is to disable paint functions which are
emitting flammable material (paint, solvent, etc.) into the cabin, if vital cabin
functions are not present, like the cabin ventilation (cabin fans), fire extinguishing
system. This is achieved by including dual switches on the cabin fan relay in the
cabin interlock chain.
Description When the cabin interlock chain is broken, +24V_FUNC will be disconnected from
the manipulator board and one of the VCD modules. Paint functions connected to
these modules (via pilot valves) will thereby be disabled. Paint functions which are
normally connected to these modules are spray-gun needle, shaping air, etc.
Paint functions connected to the other VCD modules, powered by +24V_MAN, will
not be affected by the cabin interlock chain. Typical connections to these modules
are color change, etc.
Which functions that are interlocked and not interlocked can be found in the Process
Diagram.
When breaking the cabin interlock chain, the system will use approx. 1/2 second to
make a controlled stop of the paint functions. When closing the chain, power will be
re-applied to the interlocked paint control functions, and operation can continue.
Following conditions must be present to close the cabin interlock chain.
– 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 Cabin Interlock switch, install a 2 pole switch at terminals marked
‘Cabin Interlock’ (for chain 1 and 2) in connector SCB-X3 pin 1-4 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 disable paint functions.
The switch must comply with ’Safety System Standards’ on page 65.
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