Laser Jailer Maintenance Manual
00892-53-000
Page 9 of 16
Issue 2 30 January 2020
When the system is armed the Leakage indications are extinguished and the ‘OK’ lamp lights as
shown in Figure 5 below.
Figure 5. Normal Indications, system armed, ‘OK’ lit
5.2 Fault Latch
Should any fault occur a fault latch is set in the Monitoring and Detection circuit which keeps the
laser interlock disabled. This is intended to encourage the system to be repaired before it can be re-
used. For example, in some situations a user may attempt to electrically bypass a damaged tile in
order to get the laser working again. However, this presents a hazard because a tile is now not
monitored, so part of the enclosure is not protected. The fault latch keeps the interlock disabled if a
tile is bypassed and (unless configured otherwise) even if the power to the system is cycled.
The activation of the Fault latch is indicated either by a red light on the Monitor and Detection
circuit inside the interlock controller, or by a red ‘Fault’ light on the controller front panel.
