Remote Wall Plates; A 2078B And A 2081 Remote Plates - Redback A 4500C Operating Manual

Redback® A 4500C Evacuation Timer with Network Access

4.0 REMOTE WALL PLATES

There are a number of remote wall plates which can be connected to the A 4500C for remote triggering of the Alert,
Evacuation and Bell tones and for remotely cancelling any tones which may be active.
4.1 A 2078B and A 2081 Remote Plates (Hard Wired)
A 2078B
The A 2078B wall plate provides a remote means of triggering the Alert and Evacuation tones and the cancel function.
While the A 2081 wall plate provides a remote means of triggering the Alert, Evacuation and Bell tones and the cancel
function. Connection from the A 2078B is made to the A 4500C via a minimum of 6 wires as shown in Fig 4.1A. Connec-
tion is made from the A 2081 to the A 4500C via a minimum of 8 wires as shown in Fig 4.1B.
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.
The Alert/Evac/Chime/Cancel switches on the wall plate are connected to the corresponding contacts on the rear of the A
4500C. While the Alert, Evac and Bell LEDs on the wall plate are connected to the Alert,Evac and Bell 24V outputs of the
A 4500C. The cancel LED is not connected. A mimimum of six wires can be used on the A 2078B if the ground connec-
tions of the Alert and Evac 24V outputs and the Alert/Evac and cancel switch grounds are linked together (see Fig 4.1B).
A mimimum of eight wires can be used on the A 2081 if the ground connections of the Alert,Evac and Bell 24V outputs
and the Alert/Evac/Chime and cancel switch grounds are linked together (see Fig 4.1B).
A 2078B REMOTE
WALL PLATE
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Cancel
Evac Alert
Trigger Trigger Trigger
l c e a n C
Fig 4.1A Connecting the A 2078 Wall Plate to the A 4500C
A 2081
Common Evac Alert
24V Out 24V Out 24V Out
Bell
Trigger
Outputs limited to 120mA maximum current draw
a c E v t e r A l
- + - +
Cancel Evac Alert Evac Alert
Switch Switch Switch Lamp Lamp
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Bell
24V Out