LST B312RL Merkblatt

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B312xL_DBL_LST_EN_0804.PDF • PAGE 1
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Building Safety. Building Security.
Description
Specifi cations
The Detector Relay Base B312RL/B312NL with integra-
ted relay output is designed for the easy connection of 
automatic detectors Series 300. Due to its robust multi-
wire screw terminals, the detectors can be wired with 
ease, thus achieving a secure and durable connection.
The  relay  output  is  activated  through  the  alarm  acti-
vation of the inserted detector. In the Detector Relay 
Base B312RL the relay output remains active until the 
operating voltage is briefl y interrupted. In the Detector 
Relay Base B312NL the detector and the relay output 
are automatically reset a few seconds after detection 
of the fi re alarm.
During  construction  work  (or  when  the  detector  has 
been  removed)  the  detector  line  can  be  connected 
 through via an auxiliary contact, which is integrated into 
the  base.  With  that,  the  whole  wiring  of  the  detector 
line can be examined without risking contamination of 
the detectors. The contact is automatically opened by 
installing the detector.
The detector base is designed for surface mounting in 
dry rooms. A mechanical theft protection of the detec-
tor can optionally be activated at the detector base.
•   Suitable for automatic detectors in 
conventional technology
•   Relay output with dry change-over 
contact
•   Connection to control panels with 
12V operating voltage
•   Test contact for examining the 
detector line without detectors
•   Mechanical theft protection can be 
activated
Operating voltage 
8.5 – 15VDC
Current consumption 
 typ. 20µA (quiescent)
50mA (active)
Contact rating 
1A at 30VDC
Ambient temperature 
-20°C to +70°C
Relative humidity 
5 – 93% (no condensation)
Dimensions ø × H 
127 × 29 (mm)
Colour 
cream
Weight 
96g
Detector Relay Base B312RL 
Order number 
246101
Order name 
Detector Relay Base/Conv./300/SS B312RL
Detector Relay Base B312NL 
Order number 
246102
Order name 
Detector Relay Base/Conv./300/SS B312NL