Operating Instructions: ATOM
LED Output
ATOM Interlocking Device state is indicated by LED at the base of the device. If a device is in a fault state, a full cycle of the
inputs or power cycle may be required to clear the fault state. If fault state cannot be cleared contact Fortress Technical
Support.
Led
Pattern
Status
State
Cause
Troubleshooting
Safety Output State
Safety
on Guard
Locking
(SOGL)
Safety on
Guard
(SOG)
Off
Off
No power supply
Check continuity from
power supply to device
Low
Low
Green
Locked
High
High
Green / Red
Unlocked,
Actuator In
Low
High
Red
Actuator
Out
Low
Low
Red Flash
Overridden Auxiliary release left in
unlocked position
Check that the auxiliary
release has been rotated
fully anti-clockwise
Low
High
Green Flash
Safety
Inputs Low
Safety Input signal from
previous device low
Check the safety state of
the previous device, or
continuity from the 24V
supply if the first device in
the chain
Low
Low
Amber
Unlocking
Fault
Unable to unlock, possibly
due to tension on actuator
Check for any obstruction
of the mechanism.
Press actuator tightly
towards the device to
release any tension
Low
High
Amber Flash
Safety
Input Fault
Mismatch between two
safety input signals
Confirm continuity from the
previous device on both
safety inputs, then reset
fault by cycling the safe
state of the previous device
Low
Low
2 Amber
Flash
Safety
Output
Fault
Short circuit on safety
output signals
Confirm the safety outputs
are not shorted together, or
to any other signal
Low
Low
3 Amber
Flash
Wrong
RFID
Actuator
Used
Actuator from another
device used by mistake
Confirm serial number of
actuator matches that of
the device
Low
Low
Long Amber
+ Flash
Locking
Fault
Device unable to lock
Check for any obstruction
of the mechanism.
Press actuator tightly
towards the device to
release any tension.
Low
High
Long Amber
+ 2 Flash
RF Lost
Whilst
Locked
RF signal from actuator
lost whilst in the locked
state
Check that mechanism has
not been rotated without
the actuator – see
instructions on Actuator
Does Not Enter.
Low
Low
Long Amber
+ 3 Flash
Under /
Over
Voltage
Insufficient supply voltage
to device.
Measure the supply
voltage at the device is
within specification
Low
Low
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