Bosch D7212GV2 Instalační příručka stáhnout pdf (Strana 15)

D7212GV2 | Operation and Installation Guide | 4.0 Installation

Bosch Security Systems, Inc. | 2/07 | F01U003805-02 15

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 14.

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.

Warning:

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

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

sends a GROUND FAULT TROUBLE, AREA 1

(Modem IIIa

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 D7212GV2 Control Panel logs and

prints a Ground Fault event as a Trouble

Point 256 if communicating in Modem IIIa

format. If communicating in BFSK format,

the D7212GV2 generates an Alarm Zone 5

event.

Figure 3: Ground Fault Detection

GROUND FAULT DETECT

Enabled

Disabled

PHONE

LED

RED

ON when

communicating

OFF when idle

PHONE LINE SEIZED

TIP

RING

TELCO CORD

MODEL D161

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.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 59 60

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