User guide
Installing I/O Modules 
Installation Handbook, AutroSafe Interactive Fire Alarm System, Release 3, 116-P-ASAFE-FA/DE, 
Rev. J, 2011-12-06, 
 Autronica Fire and Security AS 
3.7  Loop Driver Module, BSD-310 / BSD-311 
Screw Terminal no.  Signal 
1  OUT + (+24V) 
2  OUT - (0V) 
3 Shield 
4 IN + 
5 IN - 
6 Shield 
7 F/S + 
8 F/S - 
9 Chassis 
10 Chassis 
  Green indicator, H5. Communication indicator that gives a pulsing 
green light during traffic. 
  Red indicator, H1. Fail_Safe indicator that gives a steady red light if 
a communication failure occurs, i.e. the system does not respond to 
an alarm. 
Schematics 
24V DC Out
In
1
2
4
5
6
3
+
-
+
-
Detector
3
1
2
3
2
1
3
1
2
BSD-310
8
7
-
+
F/S Signal
From previous Loop Driver Module
To next Loop Driver Module
Loop
Driver 
Module
Screw
terminal 1
Red
indicator
H1
Green
indicator
H5
Front view when mounted on rail
Screw
terminal 10










