ADEMCO VISTA-128B, Installation And Setup Gude, Page: 70 / 208

VISTA-128B Installation and Setup Guide
12-2
Ground Start Operation
UL
Not intended for use in UL Listed applications..
You cannot use Output 1 for an Ground Start if using it for a Remote Keypad Sounder, Open/Close
trigger, or an AAV module.
Output 1 may be used to trigger an optional 675 Ground Start Module for installations
requiring ground start operation instead of loop start operation to obtain dial tone.
When the panel has a message to transmit to the central station, it will seize the line, and
then trigger the 675 Module to connect the RING side of the telephone line to earth ground.
The panel will cause the module to break the connection between RING and earth ground
when it obtains a dial tone.
Ground Start Operation Setup
To setup the system for ground start operation, perform the following steps:
Step Action
1 Connect the 675 Ground Start Module to the panel's J7 connector trigger output
1, to auxiliary power, and to the RING side of the telephone line, see figure 12-2.
2 Determine which side of the telephone line is the RING side by connecting the (+)
lead of a DC voltmeter to earth ground, and the (-) lead to one side of the
telephone line. The wire which reads + 50VDC is the RING side.
3 Program the following data field:
1*46 AUXILIARY OUTPUT ENABLE: Set to "0" (factory default)
12
3456
78
9
4142TR
CABLE
GRAY (GROUND)
YELLOW (OUT 1)
RED (OUT 2)
GREEN (GROUND)
BROWN (OUT 3)
BLUE (GROUND)
BLACK (OUT 4)
WHITE (GROUND)
J7 CONNECTOR
N/U
IF USED:
1. OUT 1 IS NO LONGER
USABLE FOR OPEN / CLOSE
(SEE FIELD 1*46).
2. OUT 2, 3, 4 CAN STILL BE
USED TO PROVIDE ALARM
STATUS INDICATIONS OR
TO OPERATE A KEYSWITCH
(SEE FIELD *15).
3. THE 675 IS NOT UL LISTED.
BR
O
W
N
GROUND START
TRIGGER
BLUE
GREEN
BLACK
VIOLET
TO AUX. POWER
TERM. 7
TO AUX. POWER
TERM. 6
(50mA CURRENT DRAW)
675
GROUND
START
MODULE
(CUT ORANGE
JUMPER)
TO
TELCO
RING
TO
EARTH
GROUND
Figure 12-2: Ground Start Module Connections
If you need information about actual programming procedures, see: The Mechanics of
Programming section .