TABLE 3. DETECTOR STATUS INDICATION
NOTE: Power Board LED is not visible unless the power board cover is removed. If any other visual indication is noted contact System Sensor technical support
at 1-800-SENSOR2.
DETECTOR
STATE
SENSOR LED
POWER BOARD LED
COMMENTS
RELAY STATES
Power Up
Red Blink every 5
seconds
Alternating Green/
Amber Blink every 1
second
Initialization completes in
approximately 30 sec
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Standby
Green Blink every 5
seconds
Green Blink every 5
seconds
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Maintenance
Red Blink every 5
seconds
Amber Blink every 5
seconds
The 2D51 sensor is outside it’s
UL approved sensitvity limits and
needs to be cleaned or replaced.
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Speed-Up
Alternating Red/
Green Blink every
0.5 seconds
Green Blink every
0.5 seconds
Alternating red /green blink
pattern exists until unit either
enters Alarm or reverts to
Standby (within approximately
60 seconds).
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Trouble
Red Blink every 5
seconds
Amber Solid
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
Cover Tamper
Violation
Red Blink every 5
seconds
Amber Solid
When in “Standby” mode,
the product goes into “Cover
Tamper Violation” if the cover
has been removed or improperly
replaced and remains so for at
least 7 minutes. As soon as the
cover is properly reseated, the
product reverts to “Standby”
automatically.
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open.
Aux Relay does not switch states
Communication
Error
Off
Amber Solid
Sensor LED state cannot be
guaranteed since there is a
communication error.
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
Alarm
Red Solid
Red Solid
Supervisory relay: Terminals 3 and 14 are closed
Alarm Relay: Terminals 4 and 5 are closed
Aux Relay switches states: Terminals 6 and 16 are
open; Terminals 8 and 18 are open
Unit Loses
Power
Off
Off
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
7
I56-4260-002R
06-10
