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VISTA-50P/VISTA-50PUL Installation and Setup Guide

3-8

Using 4-Wire Smoke Detectors on Zones 1-8

You may use as many 4-wire smoke detectors as can be

powered from the panel's Auxiliary Power output

without exceeding the output's rating (750mA).

Auxiliary power to 4-wire smoke detectors is

not automatically reset after an alarm, and

therefore must be momentarily interrupted

usin

either the J7 smoke detector reset output

trigger or a 4204 Relay Module.

Compatible 4-Wire Smoke Detectors

Use any UL Listed 4-wire smoke detector that is rated

for 10-14VDC operation and that has alarm reset time

not exceeding 6 seconds. Some compatible 4-wire

smoke detectors are listed below.

Detector Type Detector Model #

Photoelectric, direct wire System Sensor 2412

Photoelectric w/heat

sensor, direct wire

System Sensor 2412TH

Ionization, direct wire System Sensor 1412

Wiring 4-Wire Smoke Detectors

Power to 4-wire smoke detectors must be

supervised with an EOL device (use a System

Sensor A77-716B EOL relay module connected

as shown in

Figure 3-11

To wire 4-wire smoke detectors to zones 1-8, perform

the following steps:

Step Action

1 Select 4-wire smoke detectors (see list of

compatible detectors shown previously in

this section).

2 Connect detectors (including heat detectors,

if used) across terminals of the zone selected.

All detectors must be wired in parallel. See

Figure 3-11.

3 Connect the EOLR at the last detector in the

loop across the zone’s terminals. You must

connect the EOLR across the loop wires

at the last detector.

HEAT

DETECTOR

4-WIRE

SMOKE

DETECTORS

V128BP-002-V0

NO CONNECTION

RESET

RELAY 1, 2, 3, OR 4

4204 RELAY MODULE

NOTES:

· PROGRAM THE RELAY TO

TRANSFER ON FIRE ZONE

RESET (ACTIVATION CODE 54).

SEE 4204 RELAY MODULE

SECTION FOR DETAILS.

· SECOND CODE AND OFF

ENTERED AT CONSOLE

MOMENTARILY INTERRUPTS

DETECTOR POWER.

SHOWN POWERED.

RELAY OPENS WHEN

POWER IS LOST.

EOL POWER

SUPERVISION

RELAY MODULE

A77-716B

EOLR

FIRE ZONE

TERMINALS

AUXILIARY

POWER

TERMINALS

Figure 3-11: 4-Wire Smoke Detectors

Using Smoke Power Reversal Module

The 333 PRM Polarity Reversing Module is used to

reverse the polarity of the positive and negative

voltages powering smoke detectors. The module is for

use with 4-wire smoke detectors that employ a sounder

and voltage-reversing feature. The module is triggered

by a pulsing bell output.

Smoke Detectors Compatible with the 333PRM

The 333PRM may be used with the System Sensor

2112/24AT and similar models with the required

operating features previously stated.

The 333PRM reverses polarit

to smoke detectors

with Integral Temp-3 Sounders. Typically, in

alarm, each draws 49-60mA of current. The

control panel supplies onl

enou

h current for one

smoke detector. In order to attach more than

one, an external power supply and an external

relay may be required.

Installing the 333 PRM

Mount the 333 PRM inside the control panel’s cabinet

or in a separate cabinet using the double-sided tape

provided. Wire the 333PRM as shown in Figures 3-12,

3-13, or 3-14. Refer to the 333PRM Installation

Instructions for detailed information on the installation

of the module.

Corrected

by Tech

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ADEMCO Vista-50 Guide d'installation Page 20

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