
VISTA-128B Installation Instructions
12-2
1 2 3 4 5 6 7 8 9
GRAY
YELLOW
WHITE
RED
GREEN
BROWN
BLUE
BLACK
GROUND
OUT 1
GROUND
OUT 2
GROUND
OUT 3
GROUND
OUT 4
J7 CONNECTOR
OUT 1: GROUND START OR OPEN/CLOSE
OUT 2: FIRE OR KEYSWITCH ARMED LED
OUT 3: BURGLARY/AUDIBLE PANIC/AUXILIARY
OUT 4: SILENT PANIC/DURESS OR KEYSWITCH READY LED
N/U
4142TR CABLE
Figure 12-1. J7 Pin Assignments and Functions
Ground Start Trigger Setup
U
L
Not intended for use in UL Listed applications.
.
Output 1 may be used to trigger an optional 675 Ground Start Module for installations
having telephone lines which require ground start instead of loop start operation to obtain
dial tone from the telco central office.
When the panel has a message to transmit to the central station, it will seize the line, go off
hook, 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 Module Connections
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 as shown in the diagram
below.
2. Use the following procedure to determine which side of the telephone line is the RING
side:
a. Connect the (+) lead of a DC voltmeter to earth ground, and the (-) lead to one side of
the telephone line.
b. The wire which reads + 50VDC is the RING side.
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