TECHNICAL DATA
ELECTRICAL
THRESHOLD
6.25 ± 0.75 mA (single coil, 643 ohm)
16 ± 3.5 mA (single coil, 23 ohm)
23 ± 4.6 mA (using one of the dual coils)
11.5 ± 2 mA (using the dual coils in series)
23 ± 4 mA (using the dual coils in parallel)
DEADBAND
12.5 ± 1.5 mA (single coil, 643 ohm)
32 ± 7 mA (single coil, 23 ohm)
46 ± 9 mA (using one of the dual coils)
23 ± 4 mA (using the dual coils in series)
46 ± 9 mA (using the dual coils in parallel)
FULL STROKE CURRENT
18 ± 1.5 mA (single coil, 643 ohm)
90 ± 12 mA (single coil, 23 ohm)
130 ± 18 mA (using one of the dual coils)
65 ± 9 mA (using the dual coils in series)
130 ± 18 mA (using the dual coils in parallel)
For sizing drive sources, use 100 mA in computations
for single coil EDCs. See Input Current vs. Pump
Swashplate Angle, page 3.
COIL RESISTANCE @ 24° C (76 ° F)
23 ohms (single coil, optional)
643 ohms (single coil)
20 ohms (A, B terminals) (dual coil)
16.5 ohms (C, D terminals) (dual coil)
COIL RESISTANCE @ 104° C (220° F)
29 ohms (single coil)
842 ohms (single coil)
24.7 ohms (A, B terminals),
19.7 ohms (C, D terminals) (dual coil)
SUGGESTED DRIVE VOLTAGES
The MCV105A EDC uses a pilot valve that is current-
driven. Since coil resistance is a function of temperature,
as the pilot’s coil temperature increases, a higher input
voltage is required to drive the pilot to full stroke. Table
B - Suggested Voltage Drives, below, demonstrates this
relationship and lists the suggested voltage drives for
two coil temperatures.
MAXIMUM CONTINUOUS VOLTAGE THAT WILL NOT
DAMAGE THE DEVICE
6.0 Vdc @ 200 ° F (93.3° C) (dual coil)
7.5 Vdc @ 200 ° F (93.3° C) (single coil, 23 ohm)
30 Vdc @ 200° F (93.3° C) (single coil, 643 ohm)
COIL INDUCTANCE
0.085 Henries (single coil, 23 ohm)
0.062 Henries (A, B terminals 20 ohm) (dual coil)
0.047 Henries (C, D terminals 16.5 ohm) (dual coil)
2.372 Henries (single coil, 643 ohm)
HYDRAULIC
OIL VISCOSITY
40 - 6000 SSU
FLUID
Automatic transmission fluid or hydraulic oil, such as
Mobil DTE 24 or equivalent. Fluid cleanliness is ISO
4406 code 18/15 or better.
FLUID TEMPERATURE
The valve will be functional and undamaged at oil
temperatures of -40 ° to 121° C (-40° to 250 ° F). The
valve will meet performance specifications with a fluid
temperature of 21° to 82° C (70° to 180° F).
FILTRATION
The system hydraulics will have a filtration rating of ß
10
= 2 or better
TABLE B - SUGGESTED VOLTAGE DRIVES.
120
°
F (49
°
C) OIL TEMPERATURE
180°
F (82
°
C) OIL TEMPERATURE
COIL
CURRENT (mA)
VOLTAGE (Vdc)
CURRENT (mA)
VOLTAGE (Vdc)
SINGLE (23 ohm)
90
2.2
90
2.5
SINGLE (643 ohm)
18
13.2
18
14.7
DUAL (Coil A) (A, B terminals)
132
2.7
132
3.0
DUAL (Coil B) (C, D terminals)
132
2.2
132
2.5
DUAL (In Series)
66 *
2.4
66 *
2.6
DUAL (In Parallel)
132 *
1.2
132 *
1.3
* Algebraic sum of currents in the two coils.
© Danfoss, 2014-05
11152452 • Rev AA • May 2014
2
