4 GRX-WCI Installation Instructions
Communication Link Wiring
• PELV (Class 2: USA) low-voltage wiring connects the
GRX-WCI to GRX-3000/4000 control units and other
components.
• You can link up to 8 control units and up to 16 total
GRX-WCIs, wallstations, and/or control interfaces, for a
total of 24 control points.
System Communications
• If used as part of an unaddressed system (control
units not addressed), the GRX-WCI will affect all
control units on the system.
• For an addressed system (control units addressed),
follow the steps below.
1.
Enter program mode
(only one GRX-WCI can be in
program mode at a time). Press and hold the program
button for about 3 seconds, until the LED starts
flashing.
2.
Identify the control unit(s)
that you want to “listen” to
this GRX-WCI. (Control units must be addressed!)
Press and hold the top scene button on the control
unit for about 3 seconds, until the LEDs flash in
unison. Repeat for each control unit that you want to
“listen” to the GRX-WCI.
Note:
To make a “listening” control unit not listen to a
GRX-WCI, put the GRX-WCI in program mode, then
press the “listening” control unit’s OFF button until
the LEDs stop flashing.
3.
Exit program mode.
Press and hold the program
button for about 3 seconds, until the LED stops
flashing.
Contact Closure Wiring
• Connect the desired input(s) and common wires to the
switch provided by others.
• Cap off unused input wires.
Switch (provided by others).
If input switch is solid state,
must have a solid-state
output with an on-state
saturation voltage less than
1 V
at 1 mA and an
off-state leakage current of
less than 1 mA.
Common
Input 1
LUTRON
Control unit
LEDs flash in unison
Press here
for “listen”
R
Program button
Wiring
Note:
Use appropriate wire connecting devices
as specified by local codes.
To other control
interfaces
(2) 2.5 mm
2
(#12 AWG )
(2) 2.5 mm
2
(#12 AWG )
(2) 1.0 mm
2
(#18 AWG)
twisted, shielded pair from
terminals 3 to 3 and 4 to 4
Drain wires
4 3 2 1
(2) 1.0 mm
2
(#18 AWG)
