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D9112 Operation & Installation Manual
Page 56
74-06144-000-C 2/96
© 1993-1996 Radionics
Keyswitch
Description
You can connect a maintained or momentary contact arming station (keyswitch) to
master arm/disarm any of the areas in the D9112. The keyswitch is connected to an on-
board or off-board point’s sensor loop. Relays can be programmed to activate arming
status LEDs for keyswitch arming stations. See the
Relays
section of the
D9112 Program
Entry Guide
(74-06145-000).
Programming
See the
Point Assignments
section of the
D9112 Program Entry Guide
(74-06145-000)
for the correct programming for points used for keyswitches.
Installation
For maintained switches, connect the end-of-line resistor for the point at the keyswitch so
that the switch opens the circuit when it operates. A short on the circuit produces an
alarm if the area is armed and a trouble if it is disarmed. See Figure 20.
For momentary switches, connect the end-of-line resistor for the point at the keyswitch so
that the switch shorts the resistor when it operates. An open on the circuit produces an
alarm if the area is armed and a trouble if it is disarmed. See Figure 20.
Keyswitch Operation
Maintained Contact
If you program the point the keyswitch is connected to for a maintained contact, an open
on the arming circuit arms the area. All faulted points are force armed, regardless of the
entry in the
FA Bypass Max
program item. Returning the circuit to normal disarms the
area. See
Area Wide Parameters
and
Point Assignments
in the
D9112 Program Entry
Guide
(74-06145-000).
Momentary Contact
If you program the point the keyswitch is connected to for a momentary contact, shorting
the arming circuit toggles the area’s arming state between armed and disarmed. All
faulted points are force armed, regardless of the entry in the
FA Bypass Max
program
item. See
Point Assignments
in the
D9112 Program Entry Guide
(74-06145-000).
Silencing the Bell
To silence the bell (stop Alarm Bell output ) if the system is armed, operate the keyswitch
to disarm the area. If the area is disarmed, operate the keyswitch once to start the arming
process and silence the bell. Operate it a second time to stop the arming process.
Figure 20: Keyswitch Wiring
COMMON
POINT INPUT
COMMON
POINT INPUT
OPEN ON
CIRCUIT ARMS
AREA
SHORT ON
CIRCUIT
TOGGLES
ARMING STATE
1K
or
33 K
Ω
Ω
1K
or
33 K
Ω
Ω