Sauer Danfoss H1 - Non Feedback Proportional Electric Control (NFPE) Options A8 (12 V); B8 (24 V)

16
11063344 • Rev EA • Dec 2012
H1 Axial Piston Pump, Size 045/053, Single
Technical Information
General Technical Specications
Non Feedback
Proportional Electric
Control (NFPE)
Options A8 (12 V) /
B8 (24 V)
The Non Feedback Proportional Electric
(NFPE) control is an electrical automotive
control in which an electrical input
signal activates one of two proportional
solenoids that port charge pressure to
either side of the pump servo cylinder.
The NFPE control has no mechanical
feedback mechanism.
The pump displacement is proportional
to the solenoid signal current, but it also
depends upon pump input speed and
system pressure. This characteristic also
provides a power limiting function by
reducing the pump swashplate angle
as system pressure increases. A typical
response characteristic is shown in the
accompanying graph.
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.
P003 188
C2C1
F00A
M14
TP
F00B
NFPE Schematic
P003 192
Control signal requirements
"0"
Signal Current
mA(DC)
abc
a
b
c
Displacement
100 %
100 %
NFPE control
∆p = 300 bar
∆p = 300 bar
∆p = 0 bar
∆p = 0 bar
P003 187E
Pump displacement vs. input signal
12
P003 480
Connector
Control current
Size
(cm
3
)
Voltage
a*
mA
b
mA
c
mA
Pin
connections
45
12 V 710 1135 1380
any order
24 V 360 585 675
53
12 V 715 1140 1495
24 V 365 570 720
* Factory test current, for vehicle movement or ap-
plication actuation expect higher or lower value.
T301 002E
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