Elliott Digger Derrick - Reeling Drum Voltage Checks

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W450321A 09/12
6.5 Reeling Drum Voltage Checks
If problems occur with the two-block alarm operation, angle, or extension sensor, refer to the following
chart. Follow the Boom Position/Action column before performing any voltage checks. Measure all
voltages with a digital voltmeter set to DC volts range.
SIGNAL
BOOM
POSITION/
ACTION
VOLTAGE
VOLTMETER CONNECTION
MIN MAX RED (+) BLACK (-)
SENSOR
DRIVE
- +4.7V +5.3V RED BLUE
ANGLE
SENSOR
OUTPUT
0 degrees 0.4V 0.6V GREEN BLUE
EXTENSION
SENSOR
OUTPUT
0 ft. FULL
RETRACTED
0.15V 0.35V WHITE BLUE
TWO-BLOCK
DRIVE
ATB WEIGHT
DOWN
5.5V 7.5V BLACK BLUE
ATB WEIGHT
UP
9.5V 10.5V BLACK BLUE
TWO-BLOCK
SIGNAL
ATB WEIGHT
DOWN
5.5V 7.5V BROWN BLUE
ATB WEIGHT
UP
0V 2V BROWN BLUE