Sauer Danfoss H1 - Electrical Displacement Control (EDC) Options A2 (12 V);A3 (24 V)

12
11063344 • Rev EA • Dec 2012
H1 Axial Piston Pump, Size 045/053, Single
Technical Information
General Technical Specications
Electrical Displacement
Control (EDC)
Options
A2 (12 V)/A3 (24 V)
P003 479E
"0"
-b -a
ba
100 %
100 %
Displacement
Current mA
Control signal requirements
Pump displacement vs. control current
Feedback from
Swash plate
PTF00B
M14
C1 C2
F00A
P003 478E
EDC-Schematic diagram
P003 191
12
P003 480
Connector
EDC Principle
The Electrical Displacement Control
(EDC) consists of a pair of proportional
solenoids on each side of a three-
position, four-way porting spool. The
proportional solenoid applies a force
input to the spool, which ports hydraulic
pressure to either side of a double acting
servo piston. Dierential pressure across
the servo piston rotates the swashplate,
changing the pump‘s displacement from
full displacement in one direction to full
displacement in the opposite direction.
Under some circumstances, such as
contamination, the control spool could
stick and cause the pump to stay at some
displacement.
A serviceable 125 μm screen is located in
the supply line immediately before the
control porting spool.
Control current
Voltage
a*
mA
b
mA
Pin
connections
12 V 640 1640
any order
24 V 330 820
* Factory test current, for vehicle movement or
application actuation expect higher or lower value.
T000133E
Description Quantity Ordering number
Mating connector 1 Deutsch® DT06-2S
Wedge lock 1 Deutsch® W2S
Socket contact (16 and 18 AWG) 2 Deutsch® 0462-201-16141
Sauer-Danfoss mating connector kit 1 K29657
T000 134E