GRX-LC8 ContRoLLeR
Installation and Setup Instructions
Please Read
Description
the GrX-Lc8 controller works with a GrX-ces series daylight sensor to allow for changes to be made to a Lutron
lighting system through a contact closure. it is a single channel lighting controller that features an adjustable on
setpoint as well as an adjustable oFF setpoint. the controller features a signal deadband and time delay to ensure
lighting stability. the controller is powered by a pp series power pack.
instALLAtion
Mount the controller using the adhesive strips provided. choose a location where the pp series power pack can be
provided with power.
WirinG
R
6 7 8
1 2 3 4 5
SENSOR DELAY
OFF
ON
On LED
Off LED
On Setting Knob
Off Setting Knob
sensor (typical)
power pack
pp-120H,
pp-277H, or
pp-UnVH*
Lc8 controller
Yellow (0-10 V
signal)
Black
(common)
red (24 V
)
red (24 V
)
Black
Blue (cap off)
Black (120 V )
White (neutral)
red (cap off)
red (cap off)
n.o. contact
common
n.c. contact
to Lutron lighting control system
peLV (class 2: UsA) only
no line voltage
notes
• When interfacing to a Lutron system, the
n.c. contact will turn lights on (contact
closure close) when daylight levels are
low, and turn lights off (contact closure
open) when daylight levels are high.
• When the off or on LeD is lit, the light
level is above the setting of its respective
knob.
cALiBrAtion
each GrX-ces sensor is calibrated during manufacturing to the light levels in its intended environment (indoor,
outdoor, etc.). Below is a chart of the settings for each model. the first column corresponds to the settings on the
adjustment knobs in the GrX-Lc8 controller.
Adjustment
Knob Setting
Corresponding Foot-Candle Thresholds
GRX-CESI
GRX-CESA
GRX-CESS
GRX-CESO
Below 1
0
2
10
0
1
10
100
200
25
2
20
200
400
50
3
30
300
600
75
4
40
400
800
100
5
50
500
1000
125
6
60
600
1200
150
7
70
700
1400
175
8
80
800
1600
200
9
90
900
1800
225
10
100
1000
2000
250
*check with Lutron for availability