ICS-6 Instruction Manual
01000-53-000
Page 37 of 42
Issue 11 19 January 2021
Arm Button (illuminates blue)
The Arm button will illuminate when both safety circuits are complete, and all output devices are
detected as being in the safe condition. This indicates that the ICS-6 is ready to be armed.
If both Safety Circuit Complete lights are lit but the button is not illuminated, this indicates that one
or more output devices are not detected in the safe condition. This may include:
An LS-20 shutter is missing or not closed, or a dummy plug has not been fitted to an empty LS-20
socket.
There is a problem associated with an expansion board, if fitted.
There is a faulty relay or contactor, if they are fitted.
If the laser has ‘laser safe’ proving contacts (see section 5.4.3), the laser is not detected in the safe
condition or is unplugged.
'Override On' LED
When the override is in operation this LED will light red to warn that the interlocks are temporarily
defeated.
‘Mismatch Fault’ LED
If the system is wired as a fully dual-channel system, the Mismatch Detector is usually enabled as
described in section 7.
The ICS-6 continually monitors both safety circuits. If a mismatch occurs that lasts for more than
about a second, the Mismatch Detector is triggered, which disables the system and illuminates a red
‘Mismatch Fault’ light on the front panel.
Site-specific procedures may be applicable in such an event, which cover actions to be taken to
determine the cause of the fault, to have it rectified and to restore the system to operation. There
may also be procedures to allow operation in degraded mode until normal operation can be
restored.
Section 7 describes the mismatch detector and how it is reset.
'Laser Armed' LED
When the 'Safety Circuit Complete' LED has lit and the Arm Laser button has been pressed, the
'Laser Armed' LED will light orange to warn that the ICS-6 has enabled the laser. If the ‘Safety Circuit
Complete’ LED is illuminated but the ‘Laser Armed’ LED does not illuminate when the Arm Laser
button is pressed, this could indicate that the internal checking circuitry of the ICS-6 has detected a
fault condition.