D9412GV2/D7412GV2 Operation and Installation Guide 4.0 Installation

4.5.3Enabling 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

 

Value of Area 5

Detection Circuit

Switch S4

Silent Relay Alarm

Enabled

Closed

1 to 128

Disabled

Closed

0

Open

0 to 128

 

4.5.4D9412GV2 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

 

No

 

200 kΩ

 

 

 

 

≥200 kΩ Detection depends upon the terminal

4.5.5Locking 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

 

 

 

1

 

Reset Pin

 

Disable All Except Battery

 

Charging And Programming

 

PERIPHERAL DEVICE CONNECTIONS

 

RED

POWER +

32

2

YELLOW

DATA BUS A

31

 

GREEN

DATA BUS B

30

 

BLACK

COMMON

29

 

1 - Reset pin locked (closed).

2 - Reset pin normal (open).

Bosch Security Systems, Inc. 5/05 F01U003641B

17

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Bosch Appliances D9412GV2 manual Enabling Ground Fault Detection, Ground Fault Detection Status, Ground Fault Impedance
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D9412GV2 specifications

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