Programmable Relay Scanner
Technical Data
WRS-2224
DESCRIPTION
PART No.
SPECIFICATION
Relay scanners have wide application in
low voltage lighting controls. Relay
scanners permit a large group of relays
to be switched together. Relay scanners
also permit each relay in the group to
be individually switched.
WRS-2224 programmable scanners
can assign relay groups with a built in
keypad. Instructions are on the label of
the scanner. Five relay groups are
possible.
Each of the 5 relay groups can have a
flick warn option selected to warn
occupants of an off sweep. After the
flick warning, occupants can cancel the
off signal with an override switch.
WRS-2224
24 Relay
Programmable
Scanner
n
n
n
n
Power:
24VAC / 50mA
Class 2 Low Voltage device.
Power rating does not include power
used to switch relays.
There are 5 master switch inputs that
are compatible with all models of Douglas
relay switches. Max. wire length for a
master switch is 2000' (600m).
Programmable scanners have a digital
link socket that permits connection of
network communication modules.
n
n
n
Outputs
WRS-2224: 24 Douglas relay outputs.
Outputs fire in sequence (<4 seconds)
to prevent overloads in the line and low
voltage circuits.
Connect a maximum of 4 relays to each
output. Max wire length is 500' (150m).
Relay outputs are isolated from each
other. The pulse of a local switch
connected to a relay on an output will
not pass through the scanner to a relay
connected on another output.
n
n
Each of the 5 relay groups can have a
time out option selected to automatically
start a timer when a group relay is
switched on then turn all group relays
off when the timer expires.
n
n
Programming
Use the membrane keypad built into the
face of the programmable relay scanner
to assign relay groups to each of the
master switch inputs.
Program settings (relay groups) are not
lost in the event of a power outage.
Directions are printed into the front cover
for handy reference.
n
WRS-2224
Programmable
Relay Scanner
Relay Outputs
24 output terminals (12 per side),
are provided for relay control.
Douglas 2-wire switches can be
connected in parallel to permit
individual control of a relay by
switch.
Individual Output LED's
In operating mode, LEDs display
if the relay is ON or OFF.
In programming mode, LEDs
display if relay is included in the
group being programmed to a
master input.
Select Buttons
& LED's for:
1) Operating mode
2) Program mode
3) Flick Warn or Time Out Option
Individual Output
Buttons
n
In operating mode, use
buttons to switch the
connected relay ON or OFF.
In programming mode, use
buttons to enter or remove
the relay from the group
being programmed.
n
Direct Digital Control Socket
Addressable RS-485, Lonworks and
BACnet network communication
modules are available.
Interfaces 2.1
C-2-1,2,3,4 -Controls, Pgm Scanner
n
n
Master Switch
Override Buttons
Use ON and OFF
override buttons to
switch relay groups.
Use input select button
to choose a relay group.
Input Select Button
Indoors, stationary, non-vibrating, noncorrosive atmosphere and noncondensing humidity.
Ambient operating temperature:
+15° to +120°F (-10° to +50°C).
n
DIMENSIONS & MOUNTING
Relay scanners mount to 35mm DIN rail
installed in relay panels.
Unit shipped with DIN mounting rail.
Use the input select button
to select the relay group
and master inputs 1, 2, 3,
4 or 5.
Directions
Directions are printed on keypad
for handy user reference.
Environment
6.5"
(165)
5 Master Switch Inputs
Connect Douglas 2-wire relay
switches to master inputs to switch
relay groups ON and OFF.
Up to 3 switches and/or 2-wire
timer outputs can be connected to
the same master switch input.
www.DouglasLightingControls.com
1
2
3
4
5
6
7
8
9
10
11
12
OPTIONS
1
13
2
14
4
16
3
15
5
17
6
18
8
20
10
22
7
19
9
21
11
PROGRAM
MODE
23
12
24
NORMAL
MODE
WRS-2224
Relay
Scanner Sw
13
14
15
16
17
18
19
20
21
22
23
24
W
B
ON
OVERRIDE
OFF
OVERRIDE
INPUT
SELECT
1
2
3
B
Inputs 4
5
B
4.0"
(103)
Plan View
1.75"
(45)
Side View
Programmable Relay Scanner
WRS-2224
Technical Data
CONNECTIONS
Simple Stand Alone Panels
n
Relay scanners permit a group of relays to be controlled with
a single master switch. Individual relays of the relay group
can also be individually switched.
n
Programmable relay scanners can control several relay
groups. Use the keypad built into the front of the scanner to
assign the relay groups. Connect the master switches or
automation controls to the scanner's inputs. Changes to relay
groups are easy to accomplish with the keypad, no rewiring
is necessary.
n
Timer automation will yield significant energy savings. A
common application is to program a timer to send an OFF
signal periodically during the unoccupied hours.
n
Install wall switches to provide for occupant override. This
can be either individual switches connected directly to the
relays and/or master switches connected to the scanner.
n
The scanner can be set to provide a "Flick Warn before
OFF". When a timer signals the scanner OFF, the flick warn
sequence occurs. See section titled "FLICK WARN BEFORE
OFF" for more details.
n
The scanner can also set a "Time Out" period where any
lights left ON will be automatically turned off at the end of
the period.
Office Floor -Reflected Ceiling Plan
Office
Office
Sw
NW Quadrant
Sw
NE Quadrant
Hall
Office
Office
Office
Office
Sw
Sw
Office
Office
Office
Storage
Library
Office
Office
Office
Sw
Elevator
Hall
Office
Hall
Hall
Sw
Office
Office
Core
Reception
Hall
Zones
Mens
Office
Office
NW Quadrant NE Quadrant
Photo
Copy
Womens
SW Quadrant
Hall
Office
Office
Core
SE Quadrant
SW Quadrant SE Quadrant
Office
Office
Office
Individual
Switches
Office
Office
Office
Relay Panel
White
Transformer
W
B
Group 1
Relay #
Relays
Relays
Lighting Circuit
1
NW Priv Office
2
NW Priv Office
Outputs
1
2
3
4
5
6
7
8
9
10
11
12
OPTIONS
Group
Switch
Station
3
NW Priv Office
4
Library
5
NW Priv Office
6
NW Priv Office
2
14
15
3
4
16
6
18
8
20
10
22
17
5
19
7
21
9
23
11
PGM
MODE
13
14
15
16
17
18
19
20
21
22
23
24
W
B
13
1
12
24
NORMAL
MODE
ON
OVERRIDE
WRS-2224
Relay
Scanner
OFF
OVERRIDE
INPUT
SELECT
1
2
3
B
4
5
B
Inputs
WTP-4408
Time Clock
NW
Quad
NE
Quad
SW
Quad
SE
Quad
A
B
1
Esc
Core
C
D
2
3
4
5
2
3
6
4
7
5
8
6
9
1
7
Core
Core
S e n s o r
S e n s o r
0
8
Clr
W
1
2
3
9
4
5
6
0
7
W
8
B
W
24VAC
Power
Interfaces 2.2
C-2-1,2,3,4 -Controls, Pgm Scanner
24VAC
www.DouglasLightingControls.com
Programmable Relay Scanner
WRS-2224
Technical Data
CONNECTIONS
Multiple Relay Panels
n
In larger buildings, there are often several load centers that
need to be controlled from one location.
n
A simple wiring strategy is to interconnect the relay panels
with a multi-conductor bus. This method permits several
master switch controls to exist at each relay panel. Connect
the scanners in the relay panel to the appropriate control
wire of the bus.
Main Panel
WRS-2224
Scanner
Projects that are interconnected with a multi-conductor bus
should use a separate transformer to supply the power
used by the multi-conductor bus. Therefore, the power used
in each relay panel to switch the relays is separate from the
power used for the master switching circuit. The isolation of
the panel power from the signal power is in the relay
scanner. All Douglas scanners have optically isolated
master switch inputs.
n
n
Lights
Rly
Lights
Rly
Lights
Rly
OPTIONS
Rly
Lights
Rly
Rly
Outputs
OPT IONS
13
1
2
14
4
16
6
18
15
3
17
5
19
7
8
20
10
22
12
24
21
9
23
11
PGM
MODE
NORMAL
MODE
WRS-2224
Relay
Scanner
INPUT
SELECT
Rly
13
14
15
16
17
18
19
20
21
22
23
24
W
B
Lights
Rly
Lights
Rly
Lights
1
2
3
B
4
Inputs B5
Individual
Occupant
Switches
Rly
Rly
Lights
Rly
Lights
Rly
Rly
Rly
Outputs
1
2
3
4
5
6
7
8
9
10
11
12
OPT IONS
13
1
2
14
4
16
6
18
8
20
10
22
15
3
17
5
19
7
21
9
23
11
24
12
PGM
MODE
NORMAL
MODE
WRS-2224
Relay
Scanner
INPUT
SELECT
13
14
15
16
17
18
19
20
21
22
23
24
W
B
OFF
OVERRIDE
1
2
3
B
4
Lights
Lights
Rly
Lights
Lights
Rly
Lights
Lights
Rly
Outputs
1
2
3
4
5
6
7
8
9
10
11
12
OPT IONS
Rly
Rly
13
1
2
14
4
16
6
18
8
20
10
22
15
3
17
5
19
7
21
9
23
11
24
12
PGM
MODE
NORMAL
MODE
WRS-2224
Relay
Scanner
INPUT
SELECT
Rly
Rly
Sw
Rly
4
5
6
Rly
Rly
ON
OVERRIDE
OFF
OVERRIDE
1
2
3
B
4
5
B
Rly
Rly
Lights
Rly
Rly
1
2
3
4
5
6
7
8
9
10
11
12
Rly
Rly
ON
OVERRIDE
OFF
OVERRIDE
1
2
3
B
4
13
1
2
14
4
16
6
18
15
3
17
5
19
7
8
20
10
22
12
24
21
9
11
PGM
MODE
23
NORMAL
MODE
WRS-2224
Relay
Scanner
INPUT
SELECT
Rly
Rly
Rly
Lights
Rly
Lights
Rly
Inputs
13
14
15
16
17
18
19
20
21
22
23
24
W
B
Rly
Rly
ON
OVERRIDE
Rly
OFF
OVERRIDE
1
2
3
B
4
5
B
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Rly
Lights
Rly
Rly
Lights
Rly
Rly
Lights
Rly
Rly
Rly
Sw
Rly
12345678 WB
2
3
23
WRS-2224
Scanner
Rly
Lights
Sw
Rly
Rly
1
13
14
15
16
17
18
19
20
21
22
23
24
W
B
Inputs B5
Rly
Rly
21
Sw
WRS-2224
Scanner
Rly
Sw
24
Lights
Tr
ON
OVERRIDE
Inputs B5
22
Rly
Remote Panel
Rly
Rly
20
NORMAL
MODE
Sw
OPTIONS
Rly
Lights
8
10
12
9
11
PGM
MODE
13
14
15
16
17
18
19
20
21
22
23
24
W
B
Lights
Lights
WRS-2224
Scanner
19
Rly
Lights
Rly
Rly
17
Sw
Rly
Sw
15
Outputs
Rly
Sw
18
Rly
ON
OVERRIDE
OFF
OVERRIDE
16
6
7
Rly
Lights
Rly
14
4
5
Rly
Tr
1
2
3
4
5
6
7
8
9
10
11
12
2
3
Inputs
WRS-2224
Scanner
Rly
13
1
WRS-2224
Relay
Scanner
Rly
Remote Panel
Lights
Rly
Outputs
1
2
3
4
5
6
7
8
9
10
11
12
INPUT
SELECT
The WRS-2224 Programmable Relay Scanner can be
networked with a data signal to other WRS-2224 Relay
Scanners. Please refer to the WNX-2624 Network Node in
the LonWorks Products data sheets.
Lights
W Tr
B
12345678 WB
7
8
24V W
B
WTP-4408
W
B
Inter-Connected Panels
A 10-conductor bus will provide eight master switch
controls that can be used in several panels.
n
n
Connect a master switch station and/or timer to the bus
for override and automation.
Sw
1
Sw
4
Sw
7
Sw
2
Sw
5
Sw
8
Sw
3
Sw
6
Time Clock
A
Esc
B
3
2
5
3
6
4
7
5
8
6
9
8
9
7
C-2-1,2,3,4 -Controls, Pgm Scanner
www.DouglasLightingControls.com
0
0
12345678
D
2
1
4
Sensor
Sensor
Interfaces 2.3
C
1
Clr
W
1
2
3
4
5
6
7
8
W
B
Global
Transformer
W
B
Programmable Relay Scanner
INSTALLATION
FLICK WARN BEFORE OFF
n
Install programmable relay scanner inside relay panel.
Connect all of relays to the relay scanner. If there are more
than 24 relays, install additional scanners.
n
n
n
n
n
Connect the master switches, timers or other devices to
the relay scanner's inputs.
The flick warn feature is generally used with automatic timer
controls. The timer signals the scanner to turn a relay group OFF.
The scanner issues a flick warn so that the occupants have a 5
minute opportunity to cancel the OFF signal.
n
After the relays of a panel have been assigned to lighting
loads, determine which relays are to be switched together.
Occupants can cancel individual relays from being switched off by
flicking them again with a local switch.
n
Use the keypad built into the front of the programmable
scanner to assign the relay groups for each of the 5 master
switches possible. Directions are printed on the scanner for
handy reference.
Occupants can cancel the relay group from being switched off by
pressing the master switch once. This will not switch the scanner,
but will cancel the off signal for the group. Pressing the button
again will switch the scanner.
n
In programming mode, the display LEDs of the scanner
show which relays are included in a group. In normal
mode, the LEDs show the state of the connected relay.
To select the "flick warn before OFF" function, use the keypad
built into the scanner. Each relay group can have its own
selection.
n
Best results are obtained if occupants are aware of how to disable
the OFF sweep after the flick warn. However, even if they are not
aware, properly located switch stations will permit occupants to be
able to turn the lights back ON.
Douglas Relay Switches
The master switch inputs of the
programmable relay scanner are
compatible with all models of
Douglas relay switches.
n
A maximum of 6 switches can be
connected in parallel to the same
switch input. The one-way
measure of the wire length
should not exceed 2000' (600m)
if using 18 AWG wire.
n
When connected to a
programmable relay scanner, the
LEDs of a Douglas led switch will
show the state of a relay group.
If any of the relays in the group
are ON, the group is defined as
being ON and the red on LED is
lit. Only when all of the relays of
a group are OFF is the group
defined as being OFF and the
green off LED is lit.
n
Take care when using WR-8501
LED switches. The WR-8501
push button switch will always
send a signal that is opposite to its
current state. If repeat OFF or ON
control is desired, use the WR8001 rocker switch which is able
to select an ON or OFF signal.
n
1
2
3
4
5
6
7
8
9
10
11
12
OPTIONS
1
The master switch inputs of the
programmable scanner are
compatible with Douglas timers
that have relay switching outputs
(eg: WTP-4408).
Interfaces 2.4
C-2-1,2,3,4 -Controls, Pgm Scanner
14
4
16
6
18
8
20
10
22
15
5
17
7
19
9
21
11
23
12
PGN
MODE
13
14
15
16
17
18
19
20
21
22
23
24
W
B
13
2
3
24
NORMAL
MODE
1
2
3
4
5
6
7
8
9
10
11
12
OPTIONS
ON
OVERRIDE
WRS-2224
Relay
Scanner Sw
1
13
2
14
4
16
6
18
3
15
5
17
7
19
8
20
10
22
12
24
9
21
11
PGN
MODE
23
NORMAL
MODE
WRS-2224
Relay
Scanner Sw
OFF
OVERRIDE
INPUT
SELECT
13
14
15
16
17
18
19
20
21
22
23
24
W
B
ON
OVERRIDE
OFF
OVERRIDE
INPUT
SELECT
1
2
3
B
Inputs 4
5
B
1
2
3
B
Inputs 4
5
B
WR-8001
Rocker Switch
Red
B Tr
W
Momentary
ON Contact
ON
Diode
OFF Contact
WR-8501
Pushbutton
Switch with
on & off LEDs
OFF
Diode
Red
Red
Maximum:
6 switches
WTP-4408
A
B
1
Esc
C
3
2
3
5
8
6
9
7 08
9
5
4
7
S e n s o r
S e n s o r
Red
Maintained
Form C
Contact
Set
ON
Diode
D
2
1
4
Master Sw Override
Douglas switch OK
with momentary
contacts. NOT OK with
maintained contacts
Time Clock
Douglas Timer
Automation
n
Technical Data
WRS-2224
Clr
6
W
1
2
3
4
NO NC
5
6
0
7
W
8
B
Coil
www.DouglasLightingControls.com
COM
OFF
Diode
B
W Tr