Danfoss MCV111B Installation guide

DESCRIPTION

The MCV111B Electrical Displacement Control (EDC) is a
two-stage electrohydraulic pump stroke control which uses
mechanical feedback to establish closed loop control of the
swashplate angle of Danfoss Series 90 Pumps.

The first stage, the MCV110 Pressure Control Pilot (PCP) 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
differential pressure to drive its unique spool arrangement
and port oil to the pump servo cylinders. The second-stage
spool configuration allows a null deadband (for machine
safety) in the pump’s output while maintaining optimum
dynamic response to control commands.

FEATURES

MCV111B

Electrical Displacement Control-PV
Series 90

BLN-95-8995-4 Issued: September 1996

•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

The MCV111B Electrical Displacement Control is ordered by
specifying the pump size and pilot type as shown in Table A.
Consult Danfoss, Minneapolis, MN, with further
questions.

TABLE A. INFORMATION NECESSARY TO SPECIFY
THE EDC.

MCV111B

BASE
DEVICE

PUMP
SIZE

PILOT STYLE

1. PUMP SIZE

MODEL CODE PUMP SIZE

03 30 cc

05 42 or 55 cc

07 75 cc

10 100 cc

13 130 cc Pump S/N < 92 - 19

XX XX

•Minimum long term null shift

• Dual coil torque motor can be used to sum two command
sources

2. PILOT

MODEL CODE PILOT STYLE

02 MS Connector

04 Packard Connector

EDCs ordered separate from the pump must have mounting
kits ordered separately:

30/55 cc PUMP KIT (KIT NUMBER KK11655)

Comprised of one K07652 gasket and six 9007314­0611 bolts

75/100/130 cc PUMP KIT (KIT NUMBER KK11675)

Comprised of one K07653 gasket and six 9007314­0611 bolts

42 cc PUMP KIT (KIT NUMBER KK11642)

Comprised of one K07652 gasket, six 9007314-0611
bolts and one K09123 washer

180/250 cc PUMP KIT (KIT NUMBER KK11618)

Comprised of one K07653 gasket, six 9007314-0611
bolts and one K09123 washer

14 130 cc Pump S/N ≥ 92 -19

18/25 180 or 250 cc

© Danfoss, 2013-09 BLN-95-8995-4 1

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TECHNICAL DATA

ELECTRICAL

FULL STROKE CURRENT

85 ± 11.3 mA (single coil)
42 ± 5.6 mA (series coils)
85 ± 11.3 mA (parallel coils)
See Current vs. Swashplate Angle curve

NOMINAL INPUT IMPEDANCE

24.7 ohms, .093 henries, each coil

DEADBAND

32 ± 7 psi divided by the scale factor

HYDRAULIC

FILTRATION

The system hydraulics must have 10 micron or better
filtration. The pump will contain screen filters near the
interface to the EDC at the charge port and control port
locations. The pilot will have screen filters at its input and
output control ports.

CURRENT VS. SWASHPLATE ANGLE

FLUID

Automatic transmission fluid or hydraulic oil, such as
Mobil DTE 24 or equivalent

OIL VISCOSITY

40-6000 SSU

OIL TEMPERATURE

-40° C (-40° F) minimum; 104° C (220° F) maximum

OPERATING SUPPLY PRESSURE

Typically 300-400 psi above case pressure

RATINGS

SCALE FACTOR

1.15 psi/mA (single coil)

2.3 psi/mA (coils in series)

1.15 psi/mA (coils in parallel)

TEMPERATURE

The valve will meet all specifications over the range of
21° to 82° C (70° to 180° F)

15°

10°

5°

100mA80 60 40 20

20 40 60 80 100

5°

10°

15°

Current Vs. Swashplate Angle of the Single Coil MCV111B.

ELECTRICAL CHARACTERISTICS

INPUT SHAFT ROTATION VS. TERMINAL CONNECTION VS. OUTPUT FLOW

(+) Voltage to Terminal

One of Dual Coils Dual Coils in Parallel Dual Coils in Series

BC D

Input Produces

ABCD

Shaft Flow Out

Rotation Of Port

++

A

+

BC D

A

+

mA

1390

Clockwise A or C B or D A or C B or D A D A B

Counterclockwise A or C B or D A or C B or D A D B A

Start Current 14 mA with 0.43 Vdc 14 mA with 0.22 Vdc 7 mA with 0.43 Vdc

Full Stroke Current 85 mA with 2.3 Vdc 85 mA with 1.15 Vdc 42 mA with 2.3 Vdc

BLN-95-8995-4

2

DIMENSIONS, 75, 100, 130, 180, AND 250 cc PUMP EDC

8,6 REF.

(0.34)

CONTROL

LINKAGE

10,4

(0.41)

22,4

(0.88)

MS CONNECTOR
OPTION

PACKARD
WEATHER-PACK
CONNECTOR
OPTION

27,94
(1.10)

52,83
(2.08)

SAE

SERVO PORT

FITTING X1

203,2
(8.00)

141,22

(5.56)

186,06

(7.33)

MANUAL OPERATOR

49,78
(1.96)

108,46

(4.27)

169,67

(6.68)

7,11

(0.28)

NEUTRAL ADJUST

LOCK NUT

7,14 DIA 6 PLACES
(0.28 DIA)

31,62
(1.25)

SERVO PORT

FITTING X2

9,4

(0.37)

Dimensions of the MCV111B EDC for 75, 100, 130, 180, and 250 cc Pumps in Millimeters (Inches).

36,07
(1.42)

SAE

55,37
(2.18)

89,41
(3.52)

12,2

(0.48)

122,99

(4.84)

1788

DIMENSIONS, 42 cc AND 55 cc PUMP EDC

27,94
(1.10)

52,83
(2.08)

MS CONNECTOR

OPTION

PACKARD
WEATHER-PACK
CONNECTOR

CONTROL

LINKAGE

10,4

(0.41)

22,4

(0.88)

OPTION

SAE

SERVO PORT

FITTING X1

203,2
(8.00)

141,22

(5.56)

186,06

(7.33)

108,46

(4.27)

169,67

(6.68)

MANUAL OPERATOR

7,14 DIA 6 PLACES
(0.281 DIA)

31,62
(1.25)

49,78
(1.96)

(0.37)

8,6 REF.

(0.34)

7,11

(0.28)

NEUTRAL ADJUST

LOCK NUT

55,37
(2.18)

36,07
(1.42)

SAE

SERVO PORT

FITTING X2

9,4

122,99

(4.84)

89,41
(3.52)

12,2

(0.48)

1789

Dimensions of the MCV111B EDC for 42 cc and 55 cc Pumps in Millimeters (Inches).

3

BLN-95-8995-4