Input Wiring - Bosch DS12R Installation And Operation Manual

DS12R | Installation and Operation Guide | Installation
2.2.2.

Input Wiring

Typical Zone Wiring
The DS12R supports zones wired with normally-open
(NO) or normally-closed (NC) contacts. Terminate
each zone with a 47 kΩ EOL resistor. Refer to Figure 6.
Figure 6: Typical Zone Wiring
1- Normally-open (NO) contact
2- EOL resistor
3- Normally-closed (NC) contact
Instant Zone Wiring
You can change any Entry/Exit Delay zone to an
Instant zone by closing a switch between the INS
terminal and the zone's COM terminal. The Entry/Exit
Delay zone returns to the programmed delay when the
switch is open. Refer to Figure 7.
Figure 7: Instant Zone Wiring
Smoke Detector Wiring
The DS12R supports four-wire smoke detectors. Figure
8 shows a smoke detector connected to an end-of-line
(EOL) relay module. Figure 9 shows an EOL resistor
connected to a smoke detector.
The total current draw of the four-wire
smoke detectors and the EOL relay
module must not exceed 250 mA.
8
Figure 8: Smoke Detector with EOL Relay Module
1- D275 EOL Relay Module
2- Smoke Detector
3- + 12VDC
4- - 12VDC
Figure 9: Smoke Detector with EOL Resistor
1- EOL Resistor
2- Smoke Detector
3- +12 VDC
4- -12 VDC
Bosch Security Systems, Inc. | 5/08 | F01U081956-01