Keri Systems SB-293 - Manual (Page 75)

Keri Systems, Inc. Technical Reference Manual – PXL-250 and SB-293
Revision 5.5 P/N: 01836-004 Page 75
10.2.2 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 Doors 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. Refer to the Alarm Relay Output section starting on page 36
for more information on Alarm relay outputs and output devices.
The enhanced alarm out annunciation feature (configured in the Doors 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 the TB10 - General Purpose Output Relay Connections section starting on
page 87).
For a typical alarm relay installation, refer to Table 24 and Figure 10-5 on page 76 and
make the following wiring and transorb connections to attach the alarm relay.
Table 24: Alarm Output
Relay Connections
TB-7 Description
Pin 4 Normally-Open
Pin 5 Common
Pin 6 Normally-Closed