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SPECIFICATION SUBMITTAL
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Control Interfaces
OMX-WCI
GRAFIK Systems
OMX-WCI
Wallbox Closure Input Interface
Description
• The OMX-WCI provides 7 control inputs to the
Lutron Lighting Control System.
• The control inputs can be set up to simulate
existing Lutron keypad functionality or custom
configured to project-specific requirements.
• The OMX-WCI mounts behind the user-supplied
switch to control the Lutron Lighting Control
System.
• Works with a PELV (Class 2), low-voltage, dry
contact switch that meets the Power
requirements found in the Specifications section
of this document.
• The power LED provides feedback:
— Lit dimly under normal operation
— Flashing indicates communication miswire
• The recommended wallbox depth is 61mm. The
wallbox depth requirements vary with the depth
of the switch in use.
• The OMX-WCI uses one address on the
Communication Link.
• Can be custom-configured for other functions.
• The OMX-WCI is not designed to work with
line/mains voltage switches.
Addressing Switches
Power LED
Input Wiring Harness
1
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Control Interfaces
OMX-WCI
GRAFIK Systems
Power
• Low-voltage PELV (Class 2)
Operating voltage: 32 VDC.
• Provides 1-way input interface between GRAFIK Lighting
Control Systems and a switch provided by others.
• If using a mechanical switch, it must be a low-voltage, dry
contact closure rated switch.
• If using a solid-state input switch, it must have an on-state
saturation voltage less than 1VDC at 1mA and an off-state
leakage current of less than 1 mA.
• Use with line/mains voltage switches could result in premature
failure of the switch being used.
• If there is any question as to whether a switch is compatible
with these specifications, contact the manufacturer of the
switch.
Key Design Features
• Meets IEC 801-2. Tested to withstand 15kV electrostatic
discharge without damage or memory loss.
System Communications and Capacity
• Low-voltage PELV (Class 2) wiring connects OMX-WCI to
Control Units and other components.
• Up to 32 Wallstations, Control Units, and/or Control Interfaces
may be connected on a PELV (Class 2) Communication Link.
Terminals
Accept up to two 1.0mm
2
(#18 AWG) typical.
Environment
0-40°C (32-104°F). Relative humidity less than 90% non-
condensing.
Specifications
2
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Control Interfaces
OMX-WCI
GRAFIK Systems
Dimensions and Mounting
Wallbox
OMX-WCI
Low-Voltage
Contact
Closure Switch
Provided by
Others
Communication
Link Wiring
4321
Side View
Back View
20mm (13/16”)
59mm
(2-5/16”)
59mm
(2-5/16”)
119mm
(4-11/16”)
Data
Data
Power
Common
Front View
3
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Control Interfaces
OMX-WCI
GRAFIK Systems
4321
(2) 1.0 mm
2
(#18 AWG)
twisted, shielded pair
from terminals 3 to 3,
and 4 to 4
1.0 mm
2
(#18 AWG)
(2) 2.5 mm
2
(#12 AWG)
Addressing
• Set Address Switches 1-5 to give the OMX-WCI the
unique system address from 1 to 32.
Low-Voltage PELV (Class 2) Wiring
• Use low-voltage PELV (Class 2) wiring to daisy-
chain OMX-WCI to the Processor Panel.
• Lutron recommends that all connections be made
in the wallbox.
If a remote connection (T-tap) must be made, the
maximum wire length from the communication link
to the connected unit must be 2.5m (8 ft.).
Two 2.5mm
2
(#12 AWG) conductors for common
(terminal 1) and 24VDC (terminal 2). Connect as
shown below.
One shielded, twisted pair #1.0mm
2
(#18 AWG)
for data (terminals 3 and 4).
Connect Drain as shown.
- Do not connect to Ground (Earth) or Wallstation.
- Connect the drain and cut off the outside shield.
Drain Wires
Note: Use appropriate wire connecting
devices as specified by local codes.
Installation
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2
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1
6
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5
Address
Switch Setting
4
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SPECIFICATION SUBMITTAL
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Control Interfaces
OMX-WCI
GRAFIK Systems
Contact Closure Wiring
• Connect the desired input(s) and common wire(s) to the switch(es)
provided by others.
• Ensure proper function then cap or cut off unused input wires.
Input 1
Common
Switch
Input 7
Switch
All switch
closure inputs
must share the
same common.
5