Bosch Appliances Home Security System D7212G Benutzerhandbuch
D7212G Operation and Installation Guide
D7212G
Page 33
© 2003 Bosch Security Systems
4998138544C
Telephone Connections
6.11
Ground Start
Some telephone systems require a momentary ground input to initiate dial tone. To interface with a ground start system,
insert a D136 Plug-in Relay into the GND START socket and set the Phone Monitor Select jumper to the GND START
position.
insert a D136 Plug-in Relay into the GND START socket and set the Phone Monitor Select jumper to the GND START
position.
WARNING
Ground start is not for use in NFPA applications. You cannot use ground start telephone systems for NFPA Central
Station Protective Signaling or Remote Station applications.
Station Protective Signaling or Remote Station applications.
Note:
Terminal 10 must be connected to an earth ground in order for ground start phone systems to operate properly on the
D7212G.
D7212G.
6.11.1
Relay Installation
Power down the system before inserting the D136 relay into the GND START socket. The relay socket is in the lower left
corner as shown in Figure 7 on page 30. The plug-in relay is shorter than the socket it plugs into. It can be installed in either
the left or right end of the socket.
corner as shown in Figure 7 on page 30. The plug-in relay is shorter than the socket it plugs into. It can be installed in either
the left or right end of the socket.
Don’t rely on relay labeling: Don’t rely on the labelling to install D136 relays. Check for the side with three pins. The three
pins go on the top side on the socket.
pins go on the top side on the socket.
Incorrect insertion does not damage the relay or the panel, however the related circuits do not function properly. A ground
start relay must not be inserted if the ground start jumper is in the loop start position (see Figure 10).
start relay must not be inserted if the ground start jumper is in the loop start position (see Figure 10).
6.11.2
Phone Monitor Select Jumper
The Phone Monitor Select jumper is above the TELCO connector point at the lower left corner of the panel. Set it in the
ground start position. See Figure 10.
ground start position. See Figure 10.
GROUND FAULT DETECT
Enabled
Disabled
Disabled
LOOP
PHONE MONITOR SELE
GROUND START
Requires
Relay Model
D136 in Ground
Start Socket
GND
Loop Start
Position
Ground Start
Position
Figure 10: Phone Monitor Select