Ground Fault Detection Troubleshooting; Control Panel To Module Wiring Overview - Bosch B9512G Installation And System Reference Manual

Control Panels
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5.2.4

Ground fault detection troubleshooting

Measure earth ground (Terminal 10) and common (Terminal 9) to determine whether the
control panel has the necessary -2.1 V decay to 0.
Measuring and comparing voltage for ground fault detection:
1.
2.
3.
Control panel voltage at Terminals 9 and 10) Terminal potentially causing ground fault
~ 0 VDC
~ 13.65 VDC
~ 2.51 VDC
~ 2.44 to 3.2 VDC
~ 10.9 to 11.2 VDC
~ 7.2 VDC
~ 5.8VDC
~ 7.35 VDC
5.3

Control panel to module wiring overview

In the following sections, this document provides instructions for wiring devices to your
control panel. You can use interconnect or terminal wiring.
If SDIx is configured for SDI2, use either SDI2 bus.
Using terminal wiring
For terminal wiring, use 18 AWG to 22 AWG (1.02 mm to 0.65 mm) wire.
Bosch Security Systems, Inc.
PANEL WIDE PARAMETERS > Miscellaneous > Ground Fault Detection. Set to Enable.
PANEL WIDE PARAMETERS > Report Routing > Burglar Reports > Trouble Report. Set to
Yes.
PANEL WIDE PARAMETERS > Report Routing > Burglar Reports > Burg Restore (After
Trouble). Set to Yes.
Set your digital voltmeter (DVM) to measure VDC.
Connect the red DVM lead to control panel Terminal 10, and the black DVM lead to
Terminal 9.
Compare this voltage to the following table:
Installation and System Reference Guide
Control panel installation | en
4, 9, 12, 15, 17, 21
5, 6, 7, 8, 26, 30
11, 13, 14, 16, 17, 19, 20, 22
24
25
28
29
1, 2
33
2016.06 | 08 | F.01U.303.996