Douglas Lighting Controls WRS-2224 Instruction Manual - Page 14

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Connections: Multiple Panels

Multiple Relay Panels
In larger buildings, there often are several load centers that need to be
n
controlled from one location.
n
A simple wiring strategy is to interconnect the relay panels with a multi-
conductor bus. This method permits several building-wide controls to
exist at each relay panel. Connect the relay panel's scanner inputs to
the appropriate control wire of the bus.
Projects that are interconnected with a multi-conductor bus should use
n
a separate transformer to supply the multi-conductor bus.
This is done so the power that switches the relays in each panel is
isolated from the power used for the building-wide switching circuit.
As all Douglas scanners have optically-isolated master switch inputs,
the WRS-2224 Relay Scanner in the panel will isolate the power in the
bus signal from the power used in the panel
Remote Panel
Tr
WRS-2224
Scanner
Lights
Rly
Rly
Lights
Rly
Rly
Lights
Rly
Rly
N o r m a l M o d e
Rly
Rly
Rly
Rly
Rly
Sw
Rly
Sw
Rly
Rly
WRS-2224
Scanner
Lights
Rly
Rly
Lights
Rly
Rly
Lights
Rly
Rly
N o r m a l M o d e
Rly
Rly
Rly
Rly
Rly
Sw
Rly
Sw
Rly
Rly
12345678 WB
1
2
3
4
5
6
7
8
W
24V
B
Inter-Connected Panels
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A 10-conductor bus will provide eight master switch
controls that can be used in several panels.
Connect a master switch station and/or timer to the bus
n
for override and automation.
WRS-2224: Directions & Applications
.
Lights
Lights
Lights
Remote Panel
Tr
WRS-2224
Scanner
Lights
Rly
Lights
Lights
Rly
Lights
Lights
Rly
Lights
N o r m a l M o d e
Rly
Rly
Sw
Sw
12345678 WB
Main Panel
Lights
Rly
Lights
Rly
Lights
Rly
Rly
Rly
Sw
Individual
Occupant
Sw
Switches
Sw
Lights
Rly
Lights
Rly
Lights
Rly
Rly
Rly
Lights
Rly
Rly
Lights
Rly
Lights
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
W
B
Sw
Sw
Sw
1
4
7
Sw
Sw
Sw
2
5
8
Sw
Sw
3
6
Group
Switch
Station
page 12
WRS-2224
Scanner
N o r m a l M o d e
WRS-2224
Scanner
N o r m a l M o d e
WTP-4408
Time Clock
12345678
A
B
C
D
1
2
3
1
2
3
Esc
Clr
4
5
6
W
4
5
6
7
8
9
1
2
0
3
8
7
9
4
5
6
0
7
Sensor
8
Sensor
W
B
DOUGLAS
lighting controls
W
Tr
B
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Lights
Rly
Lights
Rly
Lights
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Lights
Rly
Lights
Rly
Lights
Global
Transformer
W
B