ICS-TOUCH Instruction Manual
CEB00XXX-53-000
Page 11 of 43
Issue 4 19 January 2021
A 4-way terminal block is provided for each door interlock switch. One of the safety contacts which
are closed when the door is closed is wired to the ‘A’ terminals. The other safety contact is wired to
the ‘B’ terminals.
If the system is required to perform to ISO 13849 performance level ‘e’, two switches are usually
required to be fitted to each door, with the safety contact of one switch wired to the ‘A’ terminals
and the safety contact from the second switch wired in a separate cable to the ‘B’ terminals. If there
is any possibility of both cables being damaged for the same reason simultaneously it may also be
necessary to route the cables in different paths.
If the laser hazard is considered low, it is possible to use switches with only one safety contact. In
this case connect the switch across the ‘A’ terminals. Fit a wire link across the ‘B’ terminals. The
Mismatch Detector cannot be used and must be disabled, see the Mismatch Detector section below.
It is usual to use low voltage 4-core flexible cable for these connections and Lasermet can supply
suitable cable in standard PVC or low smoke zero halogen (LSZH) types.
If an Interlock input is not used, one wire link should be fitted to connect the ‘A’ terminals together,
and a second wire link to connect the ‘B’ terminals on each unused terminal block.
The example diagram below shows a system with two doors wired for ISO 13849 performance level
‘e’. Each door has two switches.
Figure 2.
