Instruction Manual
Electrical Installation
Series 51-1 Motor
Electrohydraulic Two-Position
Controls F1, F2
51-1 Motor Electrohydraulic Two Position Controls
Revision history
Table of revisions
| Date | Changed | Rev |
| August 2015 | Converted to Danfoss layout | BA |
| April 2007 | First edition | AA |
Literature references
S51-1 Electrohydraulic Two-Position Controls F1, F2 literature references
| Literature title | Description | Literature number |
| S51 and 51-1 Bent Axis Variable Displacement Motors Technical Information | Complete product electrical and mechanical specifications | 520L0440 |
| On/Off Functions Function Block User Manual | Compliant function block set-up information | 11022918 |
Latest version of technical literature
Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/
Product overview
Product image
S51-1 Electrohydraulic Two-Position Controls F1, F2
Nomenclature
S51-1 model code
Code M options
| M | Description |
| F1 | Electrohydraulic two-position control, 12 Vdc |
| F2 | Electrohydraulic two-position control, 24 Vdc |
Only certain control options for the S51-1 motor utilize the Electrohydraulic Two-Position Control. Please refer to the motor’s nomenclature to determine if the motor is equipped with the proper option. The nomenclature can be found on the motor’s nametag.
Theory of operation
Displacement can be changed electrohydraulically under load from maximum displacement to minimum displacement and vice versa, by using a built-in solenoid valve.
- Solenoid off = minimum displacement
- Solenoid on = maximum displacement
Control operation
Warning
Unintended vehicle or machine movement hazard. The loss of hydrostatic drive line power, in any mode of operation (forward, neutral, or reverse) may cause the system to lose hydrostatic braking capacity. You must provide a braking system, redundant to the hydrostatic transmission, sufficient to stop and hold the vehicle or machine in the event of hydrostatic drive power loss.
Hydraulic schematics
Circuit diagram – motor with control options: F1B1, F2B1
Ports:
A, B = Main pressure lines
L1, L2 = Drain lines
M3, M4 = Servo pressure
M5 = Gauge port servo supply pressure internal
T2, T3 = Optional orifices
N = Speed sensor
Electrical specifications
Two-position solenoid
| M-option | F1 | F2 |
| Voltage | 12 Vdc | 24 Vdc |
| Rated power | 14.7 W | 14.7 W |
Electrical installation
Pinout
DIN 43650 connector
| Pin | Function |
| 1 | PWM signal |
| 2 | Ground |
Pinout (alternative)
| Pin | Function |
| 1 | Ground |
| 2 | PWM signal |
Pin compatibility
PLUS+1® module pin type
| Pin | Function |
| 1,2 | DOUT |
| 1,2 | DOUT/PVG Power |
| 1,2 | PWMOUT/DOUT/PVG Power supply |
| 1,2 | PWMOUT/DOUT/PVGOUT |
| 1,2 | Power ground – |
Mating connector
DIN 43650 connector parts list
| Description | Quantity | Ordering Number |
| DIN 43650 connector | 1 | Hirschmann 932 106-100 |
| Mating connector kit | 1 | Danfoss K09129 |
Products we offer:
- Bent Axis Motors
- Closed Circuit Axial Piston Pumps and Motors
- Displays
- Electrohydraulic Power Steering
- Electrohydraulics
- Hydraulic Power Steering
- Integrated Systems
- Joysticks and Control Handles
- Microcontrollers and Software
- Open Circuit Axial Piston Pumps
- Orbital Motors
- PLUS+1® GUIDE
- Proportional Valves
- Sensors
- Steering
- Transit Mixer Drives
Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and electronic components. We specialize in providing state-of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market. Building on our extensive applications expertise, we work closely with our customers to ensure exceptional performance for a broad range of off-highway vehicles.
We help OEMs around the world speed up system development, reduce costs and bring vehicles to market faster.
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11024972 • Rev BA
August 2015
www.danfoss.com
© Danfoss A/S, 2015
Documents / Resources
 |
Danfoss 51-1 Motor Electrohydraulic Two Position Controls [pdf] Instruction Manual 51-1 Motor Electrohydraulic Two Position Controls, 51-1, Motor Electrohydraulic Two Position Controls, Electrohydraulic Two Position Controls, Two Position Controls, Position Controls |