D9412GV2/D7412GV2
|
Operation and Installation Guide | 4.0 Installation
16
Bosch Security Systems, Inc. | 7/09 | F01U003641-04
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.
•
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
2
format only).
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
in Modem IIIa
2
format. If communicating
in BFSK format, the control panels
generate an Alarm Zone 5 event.
Figure 3: Ground Fault Detection
GROUND FAULT DETECT
Enabled
Disabled
S4
PHONE
LED
RED
ON when
communicating
OFF when idle
PHONE LINE SEIZED
TIP
RING
TELCO CORD
MODEL D161
3
1
2
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
