Bosch Appliances D9112 Keyswitch Operation, Maintained Contact, Momentary Contact

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.

COMMON				COMMON
1K	Ω	OPEN ON		1K	Ω	SHORT ON
						CIRCUIT
or				or
		CIRCUIT ARMS				TOGGLES
33 K Ω				33 K Ω
		AREA				ARMING STATE
POINT INPUT				POINT INPUT
			Figure 20: Keyswitch Wiring
			D9112 Operation & Installation Manual
74-06144-000-C 2/96				Page 56		© 1993-1996 Radionics