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D7212GV2 | Operation and Installation Guide | 4.0
4.5.3
Enabling Ground Fault Detection
To configure the D7212GV2 Control Panel 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). 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
Enabled
Closed
Closed
Disabled
Open
4.5.4
D7212GV2 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
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.
16
Installation
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 D7212GV2 Program Entry Guide
(P/N: F01U003804).
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.
Value of Area 5 Silent
Relay Alarm
1 to 128
0
0 to 128
Yes
No
Figure 4:
Reset Pin
Reset Pin
Disable All Except Battery
Charging And Programming
PERIPHERAL DEVICE CONNECTIONS
32
RED
POWER +
YELLOW
DATA BUS A
31
30
GREEN
DATA BUS B
29
BLACK
COMMON
1 - Reset pin locked (closed).
2 - Reset pin normal (open).
Bosch Security Systems, Inc. | 5/05 | F01U003805B
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