Bosch D9412GV2 User Manual download pdf (Page 17)

D9412GV2/D7412GV2 | Operation and Installation Guide | 4.0 Installation

Bosch Security Systems, Inc. | 5/05 | F01U003641B 17

4.5.3 Enabling Ground Fault Detection

To configure the D9412GV2 and D7412GV2 Control

Panels to enable ground fault detection:

1. Set the silent relay in Area 5 to any value from 1

to 128. Do not use a zero (0) value.

The default value for the Area 5 silent relay

is 0 (zero). The 0 value disables the ground

fault detection function.

2. Close Switch S4 (Figure 3 on page 16). Refer to

Table 5 for information about the conditions for

enabling and disabling the Ground Fault

Detection Circuit.

Table 5: Ground Fault Detection Status

Ground Fault

Detection Circuit Switch S4

Value of Area 5

Silent Relay Alarm

Enabled Closed 1 to 128

Closed 0

Disabled

Open 0 to 128

4.5.4 D9412GV2 and D7412GV2 Ground Fault

Specifications

Table 6 provides the impedance specifications for

detecting ground faults when any terminal or field

wiring is shorted to ground.

Table 6: Ground Fault Impedance

Specifications

Impedance Control Panel Detects Ground Fault

≤ 300 Ω

Yes

300 Ω to

200 kΩ

≥ 200 kΩ

Detection depends upon the terminal

4.5.5 Locking the Reset Pin

Locking the reset pin disables the control panel

(Figure 4). When the control panel is disabled, the

system ignores the keypads and points. CALL FOR

SERVICE appears in keypad displays when the pin is

locked down.

On-board relays (Terminals 6 and 7) and off-board

relays deactivate when the control panel is reset.

Terminal 8 has power when the relay is deactivated.

Activation interrupts power at that terminal. The on-

board relay (Terminal 8) remains deactivated when the

reset pin is locked in the disable position.

Releasing the reset pin from the closed position resets

the control panel. The control panel resets all its timers,

counters, indexes, and buffers. Any points that restore

after a reset 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. Refer to RPS Parameters

in the D9412GV2/D7412GV2 Program Entry Guide

(P/N: F01U003636).

Locking the pin in the disable position applies power to

the control panel and charges the battery while the

detection devices and keypads are installed.

Figure 4: Reset Pin

Reset Pin

Disable All Except Battery

Charging And Programming

PERIPHERAL DEVICE CONNECTIONS

RED POWER +

YELLOW DATA BUS A

GREEN DATA BUS B

BLACK COMMON

1 - Reset pin locked (closed).

2 - Reset pin normal (open).

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