Technical Reference Manual – SB-293
01838-002 Rev. 3.0
Printing Date
Page 16 of 32
July-1998
Figure 5 – Installing Wiring and Removing a Terminal Block
Two-Door Configuration
TB-7 – Lock Relay Connection
The lock relay is a Form C relay used to control the door lock. Please refer to the Lock Relay output
section on page 13 for more information on Lock relay outputs and output devices.
For a typical fail-safe door lock relay installation, refer to Table 2 and Figure 6 and make the following
wiring and transorb connections to attach the door lock relay.
TB-7 – Pin . . .
Description
Pin 1
normally-open – GPO 1
Pin 2
common – GPO 1
Pin 3
normally-closed – GPO 1
Table 2 – Lock Relay Output Connections
Figure 6 – Fail-Safe Lock Relay Output Connections
For a typical fail-secure door lock relay installation using a door strike, refer to Table 2 and Figure 7
on page 17 and make the following wiring and transorb connections to attach the door lock relay.
To remove the terminal block
from the printed circuit board,
grasp the terminal block and
gently pull it away from the
printed circuit board.
Strip away 1/4 inch of insulation
and place the wire in the appropriate
slot. Firmly tighten the screw on the
top of the terminal block
but do not overtighten.
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-SAFE
1.5KE39C Transorb for Transient Suppression
FAIL-SAFE
ELECTRIC
LOCK
DEVICE
+
-
GPO 1
WIRING CONNECTIONS
