THREE-YEAR LIMITED WARRANTY
System Sensor warrants its enclosed product to be free from defects in materials and
workmanship under normal use and service for a period of three years from date of
manufacture. System Sensor makes no other express warranty for the enclosed product.
No agent, representative, dealer, or employee of the Company has the authority to in-
crease or alter the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the replacement of any part of the product which
is found to be defective in materials or workmanship under normal use and service
during the three year period commencing with the date of manufacture. After phoning
System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization
number, send defective units postage prepaid to: System Sensor, Returns Department, RA
#__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a note describing
the malfunction and suspected cause of failure. The Company shall not be obligated to
replace units which are found to be defective because of damage, unreasonable use,
modifications, or alterations occurring after the date of manufacture. In no case shall the
Company be liable for any consequential or incidental damages for breach of this or any
other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by
the Company’s negligence or fault. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply
to you. This Warranty gives you specific legal rights, and you may also have other rights
which vary from state to state.
Please refer to insert for the Limitations of Fire Alarm Systems
Sensor
2D51
Power Board
At power-up or reset at the panel, the
sensor will take approx 35 seconds
to initialize. Also occurs if the sensor
has been removed and restored in
the base in the sensor housing.
RED Blink every 5
seconds
Alternating
Green/amber
every 1 second
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
Sensor is missing during the seven
minute tamper Delay, if selected.
Off
Alternating
Green/amber
every 1 second
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
Sensor 2D51 is outside it's UL
approved sensitivity limits and needs
to be cleaned or replaced.
RED Blink every 5
seconds
Amber Blink
every 5 seconds
Supervisory relay: Terminals 3 and 14 are open.
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
.Unit loses Power Off Off
.Cover Tamper Delay times out
Green Blink every 5
seconds
Amber solid
.Wiring Problems between the
Sensor and the Power Board
Off Amber solid
.Mismatch between the number of
sensors connected and the Dip
Switch setting
1 sensor connected,2 selected
Green blink every 5
seconds on first
sensor.
No second sensor.
LED1 Green
blink every 5
seconds
LED2 Amber
solid
2 sensors connected,1 selected
Green blink every 5
seconds on first
sensor.
LED's off on second
sensor
LED1 Green
blink every 5
seconds
LED2 Amber
solid
Alarm Unit detects smoke Solid Red Solid Red
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
Standby
Unit has Power and it is not in
initialization, Trouble, Maintenance or
Alarm.
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
LED Status
Status Description Status of Relays
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open.
Aux Relay does not switch states with no shutdown on Trouble selected:
Terminals 6 and 16 are closed. Terminals 8 and 18 are closed.
Aux Relay Switches states with shutdown on Trouble selected:
Terminals 6 and 16 are open, Terminals 8 and 18 are open
Trouble
Sensor
Initialization
TABLE 3. DETECTOR STATUS INDICATION
NOTE: There are two LED’s on the Power board, each indicating the Status of the two sensors connected.
When there is only one sensor connected, LED2 will remain off.
NOTE: If any other visual indication is noted contact System Sensor technical support at 1-800-SENSOR2.
SS-300-022 8 I56-3936-002R
©2011 System Sensor
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