Danfoss P7 Motor Electrohydraulic Two Position Control Installation Guide
- May 15, 2024
- Danfoss
Table of Contents
Danfoss P7 Motor Electrohydraulic Two Position Control
Specifications
- Model: S51-1
- Control: Two-position Control with PCOR P7, P8
- Power Supply: 12 Vdc
- Connector: AMP Junior Power Timer
Product Usage Instructions
Electrical Installation
Before starting the installation, ensure that the power is turned off and
follow all safety precautions.
Pinout
The pinout information can be found in the user manual. Make sure to match
the connectors correctly.
AMP Connector Parts List
Refer to the parts list provided for the AMP connector to ensure all
components are included for installation.
Mating Connector
Use the specified mating connector for proper connection with the device.
Product Overview
The S51-1 model is an electrohydraulic two-position control with options
for PCOR P7 and P8. It features electric proportional pressure compensator
override and operates on a 12 Vdc power supply.
FAQ
-
Can I use a different power supply other than 12 Vdc?
No, the product is designed to operate with a 12 Vdc power supply for optimal performance. -
How do I know if I have connected the AMP connector correctly?
Refer to the pin compatibility section in the manual to ensure correct connection of the AMP connector.
Literature references
S51-1 Two-position Control with PCOR P7, P8 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
S51-1 Proportional PCOR Function Block User Manual| Compliant
function block set-up information| 11022917
Latest version of technical literature
Danfoss product literature is online at:
http://powersolutions.danfoss.com/literature/
Product overview
Product image
Nomenclature
Code M and N options
| M | Description | N | Description |
|---|---|---|---|
| P7 | Electrohydraulic two-position control with electric proportional pressure | ||
| compensator override, 12 Vdc | P7 | Electric brake pressure defeat, 12 Vdc | |
| C2 | Without brake pressure defeat | ||
| P8 | Electrohydraulic two-position control with electric proportional pressure | ||
| compensator override, 24 Vdc | P8 | Electric brake pressure defeat, 24 Vdc | |
| C2 | Without brake pressure defeat |
Only certain control options for the S51-1 motors utilize the Electrohydraulic 2 Position Control w/Electric Proportional Pressure Compensator Override to Maximum Angle. The combination of the M and N modules define the motor control’s functionality. Please refer to the motor’s nomenclature to determine if the motor is equipped with the proper options. The nomenclature can be found on the motor’s nametag.
Theory of operation
Proportional displacement control
Displacement can be changed electrohydraulically under load in response to an
electrical signal from minimum displacement to maximum displacement and vice
versa by controlling the PCOR setting proportional to the current of a
solenoid.
Solenoid not energized = maximum displacement
Override to maximum angle
To shift the unit under all conditions to maximum angle, supply the spool with
1600 mA (12 Vdc) or 800 mA (24 Vdc).
P7, P8
- Pressure compensator configuration: P7, P8 with electric brake pressure defeat.
- A solenoid-switched valve, ahead of the pressure compensator, prevents operation in the deceleration direction (when the motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.
C2
- Pressure compensator configuration: C2 without brake pressure defeat.
- Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.
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 Electrohydraulic Two-positon Control P7P7, P8P8 with Pressure Compensator Override (PCOR) to maximum angle and with electric brake pressure defeat
- Circuit diagram – Motor with Electrohydraulic Two-positon Control P7C2, P8C2 with Pressure Compensator Override (PCOR) to maximum angle
Electrical specifications
Proportional PCOR solenoid
| M-option | P7 | P8 |
|---|---|---|
| Voltage | 12 Vdc | 24 Vdc |
| Minimum Proportional PCOR Start Current | 255 mA | 127 mA |
| Maximum Proportional PCOR End Current | 1370 mA | 685 mA |
| Minimum Angle Override Current | 1600 mA | 800 mA |
| Nominal Resistance at 20° C [68° F] | 5.7 Ω | 21.2 Ω |
| **PWM frequency range *** | 100 to 200 Hz | 100 to 200 Hz |
| Recommended PWM frequency | 100 Hz | 100 Hz |
Electric brake pressure defeat solenoid
| N-option | P7 | P8 |
|---|---|---|
| Voltage | 12 Vdc | 24 Vdc |
| Rated power | 34 W | 34 W |
Electrical installation
Pinout
AMP Junior Power Timer connector
- **Pin location
**
- Pinout
Pin| Function
---|---
1| PWM signal
2| Ground - Pinout (alternative)
Pin| Function
---|---
1| Ground
2| PWM signal
Pin compatibility
- PLUS+1® module pin type/ Electric proportional solenoid pin compatibility
Pin| Function
---|---
1, 2| PWMOUT/DOUT/PVG Power supply
1, 2| PWMOUT/DOUT/PVGOUT
1, 2| Power ground – - PLUS+1® module pin type/ Electric brake pressure defeat solenoid
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 –
Pressure compensator logic
- Electric brake pressure defeat
Rotation| High pressure port| Solenoid| PCOR function
---|---|---|---
CW| A| Energized| Yes
CW| A| Non-energized| No
CCW| B| Energized| No
CCW| B| Non-energized| Yes
Mating connector
- AMP connector parts list
** Description| Quantity| Ordering number**
---|---|---
Two pin connector| 1| Tyco Electronics 282189-1
Contacts| 2| Tyco Electronics 929940-1
Seal plugs| 2| Tyco Electronics 828904-1
Mating connector kit| 1| Danfoss K19815
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
ABOUT COMPANY
- 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.
- Danfoss – Your Strongest Partner in Mobile Hydraulics.
- Go to www.powersolutions.danfoss.com for further product information.
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CONTACT
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- (Shanghai) Co., Ltd.
- Building #22, No. 1000 Jin Hai Rd Jin Qiao,
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References
- Inverter, Solar Inverter, Home Power Inverter | inverter.com
- Danfoss Power Solutions – Explore our power solutions | Danfoss
- Danfoss Power Solutions – Explore our power solutions | Danfoss
- Danfoss Power Solutions – Explore our power solutions | Danfoss
- Daikin Sauer Danfoss - Home
- Engineering Tomorrow | Danfoss
- Hydro-Gear Drivetrain Solutions | Home
- Danfoss Power Solutions – Explore our power solutions | Danfoss
- Danfoss Power Solutions – Explore our power solutions | Danfoss