ICS-7-OEM Instruction Manual
02058-53-000
Page 12 of 29
Issue 3 19 January 2021
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 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 input connector such as shown in
the above example for inputs 3-6.
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 there are more than six doors they can be wired in groups. A common situation is where there are
double doors. Interlock switches need to be fitted to both, and the two doors can then be wired
together so that a single pair of monitor indication lights will illuminate on the front panel of the ICS-
7-OEM if either of the doors is open. The switches in a group should be wired with their safety
contacts in series. Each group may have several switches. An example diagram for two door interlock
switches wired in a group is shown below.
Coded Magnetic Interlock Switches
Coded magnetic switches supplied by Lasermet cannot be overridden by the use of a magnet. Wire
the safety circuits in the same way as described in the 'Mechanical Interlock Switches section. The
monitor contacts should not be used.
