Bosch Appliances D9112 On-Board Points, Description Terminals 11 to, Point Sensor Loops

On-Board Points

Description Terminals 11 to 22

The D9112 panel provides eight on-board points. Each point functions independently and does not interfere with the operation of the others. The panel monitors the sensor loops for normal, shorted, or open conditions between an input terminal (11, 13, 14, 16, 17, 19, 20, or 22) and any of the point common terminals (12, 15, 18, and 21). Programming for the point determines how the panel responds to those conditions. See the D9112 Program Entry Guide (74-06145-000)for point programming options.

Point Sensor Loops

When wiring the on-board points, install a 1k ý resistor at the far end of the sensor loop to provide a reference for supervision. You can connect dry contact sensing devices in series (normally-closed) and/or in parallel (normally-open) to any of these loops.

The number normally-open and/or normally-closed detection devices each sensor loop can supervise is limited only by the resistance on the loop. Resistance on each sensor loop must be less than 100ý with the detection devices connected.

Ground shunts cause missed alarms: The possibility of “ground shunts” increases significantly if you don’t install the resistor at the end of the line. If you install the resistor for points 1 to 8 before a detection device on the sensor loop and the loop becomes grounded after the resistor, any devices beyond the ground are “ground shunted”. Alarm or trouble conditions beyond the ground are not seen by the panel.

POINT INPUT

TERMINAL

COMMON

NORMALLY CLOSED CONTACTS

POINT INPUT

TERMINAL

COMMON

NORMALLY OPEN CONTACTS

POINT INPUT

TERMINAL

COMMON

COMBINATION: NORMALLY OPEN AND NORMALLY CLOSED CONTACTS

1K Ω

BROWN RED BLACK

RADIONICS MODEL D105F OR D105BL (UL

LISTED BURGLAR APPLICATIONS) END-OF-LINE RESISTOR

Figure 11: On-board Point Sensor Loop Wiring

	D9112	Operation & Installation Manual
			© 1993 Radionics
74-06144-000-C 2/96		Page 33