Technical Reference Manual – SB-293
Printing Date
01838-002 Rev. 3.0
July-1998
Page 17 of 32
Figure 7 – Fail-Secure Lock Relay Output Connections
TB-7 – Alarm Relay Connection
The Alarm Relay is a Form C relay that provides an output to trigger an audible signal (or a silent
alarm) whenever the door is put into an alarm state (i.e. the door is forced open). It is also used to
trigger an alarm signal whenever the door is held open too long (exceeding the Open Time set within
the
Doors32™
access control program). Depending upon the type of alarm being installed and your
application, your alarm may require a normally closed/common connection, a normally open/common
connection, or a normally closed/common/normally open connection. Every application requires the
common lead connection. Please refer to the Alarm Relay output section on page 14 for more
information on Alarm relay outputs and output devices.
The enhanced alarm out annunciation feature (configured in the Doors32™ software) can set this
output to door forced annunciation for the B-door (door forced annunciation on the A-door is handled
by the alarm out relay on the PXL-250 controller). Door held open alarm annunciation is connected to
general-purpose output relays three and four (see page 21).
For a typical alarm relay installation, refer to Table 3 and Figure 8 and make the following wiring and
transorb connections to attach the alarm relay.
TB-7 – Pin . . .
Description
Pin 4
normally-open – GPO 2
Pin 5
common – GPO 2
Pin 6
normally-closed – GPO 2
Table 3 – Alarm Output Relay Connections
Figure 8 – Alarm Relay Output Connections
TB7
1
2
3
4
5
6
Ground/Common
Normally-Open
Ground/Common to TB-7, Pin 2
Normally-Closed Signal to TB-7, Pin 3
Normally-Closed
Normally-Open Signal to TB-7, Pin 1
12 VDC
Power
+
-
-NO CONNECTION-
SB-293 LOCK RELAY
FAIL-SECURE
1.5KE39C Transorb for Transient Suppression
FAIL-SECURE
ELECTRIC
LOCK
DEVICE
+
-
GPO 1
TB7
1
2
3
4
5
6
Ground/Common
Normally-Open
Ground/Common to TB-7, Pin 5
Normally-Closed Signal
to TB-7, Pin 6
Normally-Closed
Normally-Open Signal to TB-7, Pin 4
12 VDC
Power
+
-
-NO CONNECTION-
SB-293 ALARM RELAY
1.5KE39C Transorb for Transient Suppression
ALARM
+
-
GPO 2
WIRING CONNECTIONS
