Solenoid data
Voltage 12 V 24 V
Minimum supply voltage
9.5 V
DC
19 V
DC
Maximum supply voltage (continuous)
14.6 V
DC
29 V
DC
Maximum current
1050 mA 500 mA
Nominal coil resistance @ 20 °C [70 °F]
8.4 Ω 34.5 Ω
PWM Range
70-200 Hz
PWM Frequency (preferred)
*
100 Hz
IP Rating (IEC 60 529) + DIN 40 050, part 9
IP 67 / IP 69K (part 9 with mating connector)
Bi-directional diode cut off voltage
28 V
DC
53 V
DC
*
PWM signal required for optimum control performance.
Pump output flow direction vs. control signal
Shaft rotation CW CCW
Coil energized
*
C1 C2 C1 C2
Port A in out out in
Port B out in in out
Servo port pressurized M5 M4 M5 M4
*
For coil location see Installation drawings on page 49.
Control response
H1 controls are available with optional control passage orifices to assist in matching the rate of
swashplate response to the application requirements (e.g. in the event of electrical failure). The time
required for the pump output flow to change from zero to full flow (acceleration) or full flow to zero
(deceleration) is a net function of spool porting, orifices, and charge pressure. A swashplate response
table is available for each frame indicating available swashplate response times. Testing should be
conducted to verify the proper orifice selection for the desired response.
H1 pumps are limited in mechanical orificing combinations. Mechanical servo orifices are to be used only
for fail-safe return to neutral in the event of an electrical failure.
Typical response times shown below at the following conditions:
∆p
250 bar [3626 psi]
Viscosity and temperature
30 mm²/s [141 SUS] and 50 °C [122 °F]
Charge pressure
20 bar [290 psi]
Speed
1800 min
-1
(rpm)
Response time, FNR
Stroking direction 0.8 mm [0.03 in] Orifice 1.3 mm [0.05 in] Orifice No orifice
Neutral to full flow 2.2 s 1.0 s 1.1 s
Full flow to neutral 2.0 s 0.9 s 0.8 s
Technical Information H1 Axial Piston Single Pumps, Size 069/078
Control options
24 11062169 • Rev 0700 • November 2015
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