Remote Wall Plates; A 2078B Remote Plate - Redback A 2078B Operating Manual

Redback® A 4500A Evac Controller & Timer

3.0 REMOTE WALL PLATES

There are four remote wall plates which can be connected to the A 4500A for remote triggering of the Alert, Evacuation
and Bell tones and for remotely cancelling any tones which may be active.

3.1 A 2078B Remote Plate

The A 2078B wall plate provides a remote means of triggering the Alert and Evacuation tones and the cancel function.
Connection is made to the A 4500A via a minimum of 7 wires as shown in Fig 3.1B.
If standard Cat5 cable is used for the wiring, the plate can be located up to 30m away from the main unit. This can be
increased to 100m away using heavier guage cable, which reduces the voltage drop across this distance and ensures the
switch leds illuminate.
20 Redback® Proudly Made In Australia
The Alert/Evac/Cancel switches on the A 2078B wall plate are
connected to the corresponding contacts on the rear of the
A 4500A. While the Alert and Evac leds on the wall plate are
connected to the Alert 24V and Evac 24V outputs of the
A 4500A. The cancel led is not connected. A mimimum of
seven wires can be used if the ground connections of the
Alert and Evac 24V outputs are linked and if the Alert/Evac
and cancel switch grounds are linked together (see Fig 3.1B).
Fig 3.1A
A 4500A 50 EVENT TIMER
Common
24V Out
Cancel Evac Alert Bell
Trigger Trigger Trigger Trigger
Outputs limited to 120mA maximum current draw
l c e a n C a c E v
- + - +
Cancel Evac Alert Evac
Switch Switch Switch Lamp
A 2078B REMOTE WALL PLATE
Fig 3.1B
Evac Alert Bell
24V Out 24V Out 24V Out
t e r A l
Alert
Lamp
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Setup