Danfoss MCV109A Manual

DESCRIPTION
The MCV109A Electrical Displacement Control (EDC-MV) is
a two-stage electrohydraulic motor stroke control which uses
mechanical feedback to establish closed loop control of the
swashplate angle of Danfoss Series 2X and Series
3X motors.
The first stage, the MCV116 Pressure Control Pilot, is a
torque motor actuated, double nozzle flapper valve that
produces a differential output pressure proportional to the
applied electrical signal. The second stage uses the differen-
tial pressure to drive its double spool arrangement and port
oil to the motor servo cylinders.
FEATURES
• Single command source can be used to control both
hydrostatic pump and motor
• Servo control deadband independent of signal null
deadband: offers safety combined with accurate and
responsive control.
• Resistance to the environment: standard silicone oil filled
torque motor, environmentally sealed first/second stage
interface, full environmental testing.
ORDERING INFORMATION
MCV109s are ordered for the particular motor on which they
are to be mounted. Link Installation Kits, as ordered in the
table below, include: orifices, retaining ring, drag link, spacer
plate, swashplate pin, link and ball assembly, hex screws, O-
rings and gaskets. In some cases not all the above are
necessary for installation and they are not included in the kit.
TABLE A. INFORMATION NECESSARY TO SPECIFY
THE LINK INSTALLATION KIT.
MOTOR SERIES
Order the valve itself through the following table:
TABLE B. INFORMATION NECESSARY TO SPECIFY
THE ELECTRICAL DISPLACMENT CONTROL.
PILOT STYLE
© Danfoss, 2013-09
MCV109A
Electrical Displacement Control
BLN-95-8985-1
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The EDC Pilot comes in five styles:
PILOT STYLE
KK041 XX
The standard EDC Pilot is a single coil (one input to the
torque motor) (see Block Diagram), silicone oil filled, Packard
Connector device. The options are a dual coil, which allows
two command sources to be combined at the torque motor,
the resulting signal being the difference between the two, a
MS3102C14S-2P (Danfoss Part Number K01314)
connector.
MCV109A59 XX
BLN-95-8985-1
Pilot supply screens in series, upstream screen is exter-
nally serviceable
First and second stages can be individually replaced
Swashplate movement can be visually detected
Single or dual coil torque motor
DESCRIPTION
22 Single Coil, Packard Connector
23 Dual Coil, Packard Connector
26 Single Coil, MS Connector
27 Dual Coil, MS Connector
.
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MV
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Issued: June 1995
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