Danfoss MCW102A, MCW102C Installation guide
DESCRIPTION
The MCW102A and MCW102C Time Proportional Rotary Position Controllers provide automatic grade control on paving,
curbing and planing machines. The Controller uses a follower arm
riding on a stringline or a ski riding on the prepared surface as a
grade reference. The controllers activate solenoid valves to
position a screed, form cutting drum, or steer cylinder.
The MCW102A and C are time proportional devices having valve
on - time proportional to grade error. This feature causes the
output to the solenoid to be on a greater percentage of the time for
larger grade deviations, allowing greater sensitivity to grade
deviations than would otherwise be possible. The “A” model is
ground-side switched and the “C” model is high-side switched.
FEATURES
MCW102A,C
Time Proportional Rotary Position Controller
BLN-95-9048 Issued: March 1995
• Non-contacting sensing element for long life
• Fully burned-in components for added reliability
• Bright up/down lights for easy nulling
• Adjustable deadband sensitivity
• Run/Standby switch for manual or automatic control
• Reverse polarity and short circuit protection
ORDERING INFORMATION
SPECIFY
1. Model Number MCW102A1005 (ground-side switching)
Model Number MCW102C1002 (high-side switching)
2. Valve load to be driven
3. Accessories
4. Service parts
ACCESSORIES
1. KG04003, Right Angle Grade Follower
With breakaway joint. For grade applications only.
Follows a stringline. Also used with skate assembly, or
skate and ski assembly for following hard reference
surface.
2. K09274, Right Angle Grade Follower Less Sensing Arm
For grade applications utilizing the skate and/or skate
and ski assembly. Same as part number KG04003
above, but without the sensing arm and breakaway joint.
3. KG06001, Skate Assembly
For grade applications. Used with right angle grade
follower (part number K09274) on hard reference sur-
face.
• Rugged aluminum housing
• Withstands high vibration and shock
• Moisture and corrosion resistant
• Easy to mount
• Adjustable tracking force
4. KG02001, Ski Assembly
For grade applications. Used with right angle grade
follower (part number K09274), and skate assembly
(part number KG06001) on hard reference surface.
5. Cable Assemblies:
KW01013 – Two-foot coiled cable that extends to ten
feet. Has right angle connector on one end and straight
connector on the other to make connections between
the MCW102 and Bendix Type No. MS3102A18-1P
plug (part number K03989).
KW01035 – Two-foot coiled cable that extends to ten
feet. Has right angle connector on one end and straight
connector on the other to make connections between
the MCW102A and the paving machine bulkhead.
STRAIGHT 90°
CONNECTOR CONNECTOR
AA
BB
CE
DF
EC
FD
© Danfoss, 2013-09 BLN-95-9048 1
.
.
ORDERING INFORMATION
KW01015 – Two-foot coiled cable that extends to ten
feet. Has two straight connectors to make connections
between the MCW102C and the paving machine bulk-
head.
KW01034 – Two-foot coil cable that extends to ten feet,
has right angle connector on one end and straight
connector on the other end to make connections between the MCW101 and paving machine bulkhead.
STRAIGHT 90°
CONNECTOR CONNECTOR
AA
BB
(continued)
FE
EF
6. K00702 Lens (service part)
7. K03891 Lamp (service part)
TECHNICAL DATA
ELECTRICAL
SUPPLY VOLTAGE
12 volts
0.5 amps
Does not include output current to load.
MAXIMUM OUTPUT CURRENT @ 14 VDC SUPPLY
2.5 amp with 5 ohm load
The MCW102A has ground-side switching
The MCW102C has high-side switching
MAXIMUM REVERSED POLARITY VOLTAGE
50 Vdc for 5 minutes
SHORT CIRCUIT PROTECTION
The controllers are protected against short circuits
across the valve coil as well as shorts between the
outputs and ground. A short circuit is defined as 1 ohm
maximum resistance for 5 minutes maximum.
LOAD DUMP
Protected against load dump per SAE J2.20.97
MECHANICAL
Physical stops limit the rotation to approximately ± 23° from
null.
ENVIRONMENTAL
OPERATING TEMPERATURE
-18° to 65° C (0° to 150° F)
STORAGE TEMPERATURE
-30° to 65° C (-22° to 150° F)
HUMIDITY
After being placed in a controlled atmosphere of 95%
humidity at 38° C for 10 days, the controller will perform
within specification limits.
RAIN
The controller will withstand exposure to a 15 minute
shower with cold water after reaching the maximum
storage temperature.
VIBRATION
Withstands a vibration test designed for mobile equipment controls consisting of two parts:
1. Cycling from 5 to 2000 Hz in each of the three axes.
2. Resonance dwell for one million cycles for each
resonant point in each of the three axes.
Run from 1 g to 8 g’s. Acceleration level varies with
frequency.
SHOCK
50 g for 11 milliseconds. Three shocks in both directions
of the three mutually perpendicular axes for a total of 18
shocks.
DIMENSIONS
See the Dimensions Drawing.
2
BLN-95-9048
DIMENSIONS
Dimensions of the MCW102A, C in Millimeters (Inches).
1304
3
BLN-95-9048
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