Installing The Control Panel; Connecting Earth Ground; Terminal 10; Ground Fault Detect Enable - Bosch D9412GV2 Operation And Installation Manual

D9412GV2/D7412GV2 | Operation and Installation Guide | 4.0 Installation
4.4

Installing the Control Panel

1. Place the control panel over the inside back of the
enclosure, aligning the large rectangular openings
of the mounting skirt with the mounting hooks of
the enclosure. Slide the control panel down so
that it hangs on the hooks. Refer to Figure 2, Item
2 on page 15.
2. Remove the tape from the #6 x 1/4-in. screw in
the mounting tab on the control panel. The screw
passes through the mounting tab and into the
skirt mounting hole in the enclosure. Tighten the
screw to secure the control panel in the
enclosure.
3. Connect earth ground to the control panel before
making any other connections. Refer to Section

4.5 Connecting Earth Ground.

4.5 Connecting Earth Ground
4.5.1

Terminal 10

To help prevent damage from electrostatic charges or
other transient electrical surges, connect the system
to earth ground at Terminal 10 before making other
connections. Recommended earth ground references
are a grounding rod or a cold water pipe.
Caution:
Do not use telephone or electrical ground
for the earth ground connection. Use
1.8 mm (14 AWG) to 1.5 mm (16 AWG)
wire when making the connection.
Do not connect other control panel
terminals to earth ground.
4.5.2

Ground Fault Detect Enable

To meet UL 864 requirements, enable
Ground Fault Detect.
A ground fault is a circuit impedance to earth ground.
The control panel has a ground fault detection circuit
that, when enabled, detects ground faults on
Terminals 1 to 9 and 11 to 32. The control panel also
detects and annunciates ground faults on any device
connected to it.
Control Panels with Firmware before Version 7.03
•
To enable ground fault detection, the Ground
Fault Detect Enable jumper (S4) (Figure 3) must
be locked (closed) and a non-zero value must be
entered in the Area 5 Silent Alarm Relay. When
jumper S4 is in the unlocked (open) position, the
control panel does not detect ground fault
conditions.
16
•
If a ground fault condition occurs, the keypads
display SERVC GND FAULT and the control
panel transmits a GROUND FAULT TROUBLE,
AREA 1 (Modem IIIa
When the control panel recognizes that the
ground fault condition is corrected, and remains
corrected for between 5 to 45 consecutive
seconds, a Restoral Report is sent.
The D9412GV2 and D7412GV2 Control
Panels log and print a Ground Fault event
as a Trouble Point 256 if communicating
2
in Modem IIIa
in BFSK format, the control panels
generate an Alarm Zone 5 event.
Figure 3: Ground Fault Detection
1
2
GROUND FAULT DETECT
3
1 - With S4 closed, control panel detects ground
faults.
2 - With S4 open, control panel does not detect
ground faults.
3 - S4, Ground fault detect enable
Bosch Security Systems, Inc. | 7/09 | F01U003641-04
2
format only).
format. If communicating
S4
Enabled
Disabled
ON when
PHONE
communicating
RED
LED
OFF when idle
PHONE LINE SEIZED
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