Sensor Loops Overview And Wiring (B921C/B942/B942W Only) - Bosch B6512 Installation Manual

Control Panels
3
9.1.7

Sensor loops overview and wiring (B921C/B942/B942W only)

The keypad detects three states (Open, Supervised, Short) on its sensor loops and sends the
conditions to the control panel. Each sensor loop has an assigned point number.
Use twisted-pair wire for the module sensor loops to avoid electromagnetic interference
problems. Run wires away from the premises telephone and AC wiring.
To wire detection devices to keypad inputs, connect them to the keypad terminals labeled for
COM, and 1, 2, 3, or 4. Wire resistance on each sensor loop must be less than 100 Ω with the
detection devices connected. The terminal strip supports 12 to 22 AWG (0.65 to 2 mm) wires.
Figure 9.1: Keypad inputs wiring (B921C shown)
Callout ᅳ Description
1 ᅳ Keypad terminal strip
2 ᅳ Sensor loop
3 ᅳ 1 kΩ EOL resistor (P/N: F01U026703)
Bosch Security Systems, Inc.
1
SDI2 ON-BOARD POINTS
Device Bus
Voltage Ranges
R Y G B
Open 3.7 - 5.0 VDC
Normal 2.0 - 3.0 VDC
Short 0.0 - 1.3 VDC
1 k End of Line Resistors
AUX
1 COM 2 3 COM 4 5 COM 6
- 12 V +
COM AUX R Y G B 1 COM 2 3 COM 4 5 COM
PWR A B COM
R
Y
G
B
1 Control panel
2 Keypad
3 Terminal strip wiring
1COM2 3COM4
Keypads, keyswitches, keyfobs and transmitters | en
C
OUTPUT
B
7 COM 8
6 7 COM 8
Installation Manual
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2018.07 | 16 | F.01U.287.180