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Installing The Assembly; Connecting Earth Ground; Terminal; Ground Fault Detect Enable - Bosch D9412G Operations & Installation Manual

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D9412G/D7412G | Operation & Installation Guide |
3.4

Installing the Assembly

1. Place the assembly 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 assembly down so it hangs on
the hooks. See Figure 2.
2. Remove the tape from the #6 x 1/4-in. screw in the
mounting tab on the assembly. The screw passes
through the mounting tab and into the skirt
mounting hole in the enclosure. Tighten the screw
to secure the assembly in the enclosure.
3. Connect earth ground to the panel before making
any other connections. See Section 3.5 Connecting
Earth Ground.
3.5

Connecting Earth Ground

3.5. 1

Terminal

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. A grounding rod or cold water pipe are
recommended earth ground references.
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 panel terminals to
earth ground.
3.5.2

Ground Fault Detect Enable

Ground fault detect capability is available
only on firmware versions 6.10 or higher.
Ground Fault is defined as "a circuit impedance to Earth
Ground of approximately 95 kilohms or less." The
panel detects a ground fault on Terminals 1 to 9 and
Terminals 11 to 32 if the Ground Fault Detect Enable
jumper (S4) (see Figure 3) is locked (closed) and a non-
zero value is entered in Area 5 Silent Alarm Relay. See
the D9412G/D7412G Program Entry Guide. When the
jumper is in the unlocked (open) position, the panel does
not detect ground fault conditions. If a ground fault
condition occurs, the command centers display SERVC
GND FAULT and the panel transmits a Trouble Report
Ground Fault Area (Modem IIIa
panel to detect a ground fault condition, the panel must
see the ground fault for a minimum of 30 consecutive
seconds. When the panel recognizes the ground fault
condition is corrected, a Restoral Report is sent. For the
restoral condition to be met, the ground fault must be
corrected for between 5 and 45 consecutive seconds.
Bosch Security Systems | 10/03 | 43488E
3.0 Installation
2
format only). For the
The 9000 Series Control Panels log and
print a Ground Fault event as a Trouble
Point 256.

Figure 3: Ground Fault Detect

1
2
GROUND FAULT DETECT
3
1 - With S4 closed, panel detects ground faults.
2 - With S4 open, panel does not detect ground faults.
3 - S4, Ground fault detect enable.
3.5.3

Locking the Reset Pin

Locking the reset pin disables the panel (see Figure 4).
The system ignores the command centers and points
while disabled. CALL FOR SERVICE appears in
command center displays while the pin is locked down.
On-board relays (Terminals 6, 7, and 8) and off-board
relays deactivate when the panel is reset. There is power
at Terminal 8 when the relay is deactivated. Activation
interrupts power at that terminal. The relays remain
deactivated while the reset pin is locked in the disable
position.
Releasing the reset pin from the closed position resets
the panel. The panel resets all its timers, counters,
indexes, and buffers. Any points that restore after a reset
is performed do not generate Restoral Reports.
If the reset pin is placed in the disable position when all
areas are armed, there must be an entry in the Answer
Armed program item. See RAM Parameters in the
D9412G/D7412G Program Entry Guide).
Locking the pin in the disable position allows powering
up of the panel and charging the battery while the
detection devices and command centers are being
installed.
EN | 18
Enabled
Disabled
PHONE MONITOR SELECT
LOOP START
GND START
GROUND START
PHONE
RED
Requires
LED
Relay Model
ON WHEN
D136 in Ground
COMMUNICATING
Start Socket
OFF WHEN IDLE
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