NSi Industries DGUM-A Series - Manual (Page 17)

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exceed the length shown in the chart above . Calibrate
per instructions below .
The other terminal block, TB2 is used as remote
override inputs . Three wires are used: common
wire, channel 2 (if DGLC200A), and channel 1 .
NOTE: Do not use any supply voltage for these wires .
They should only be connected to dry (unpowered)
switches . Closing contacts between the wires for
channel 1 and common together will turn load 1 ON .
Load will stay ON as long as the two wires are
connected, no matter what the timer is set for, or the
light level . Closing contacts between the wires for
channel 2 and common together will turn load 2 ON .
The load status change due to remote override will not
be shown in the display .
Photo Sensor Calibration
After installation, in order to ensure accurate light level
performance, completely cover the EPC-A sensor .
Then gently press the recessed Sensor CAL Switch
for at least 5 seconds . After this button has been
pressed, the red LED directly above the button will
blink four times . If the button is pressed accidentally
when the light level is above 10 foot candles, the unit
will not recalibrate and the LED will blink once to signal
that it did not change calibration .