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  • Electrical Installation

    MP1 Pumps Electrical Displacement Control (EDC)

    powersolutions.danfoss.com

    http://powersolutions.danfoss.com

  • Revision history Table of revisions

    Date Changed Rev

    June 2016 First Edition 0101

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    2 | © Danfoss | June 2016 BC00000350en-US | 0101

  • Literature References MP1 Reference Literature.............................................................................................................................................................. 4 Latest version of technical literature......................................................................................................................................... 4

    Product Overview Product Image................................................................................................................................................................................... 5 Nomenclature....................................................................................................................................................................................5 Theory of Operation........................................................................................................................................................................ 6

    EDC operation.............................................................................................................................................................................. 6 EDC proportional actuation.................................................................................................................................................... 6 Hydrostatic drive line power...................................................................................................................................................6

    Hydraulic schematics...................................................................................................................................................................... 7 Electrical specifications.................................................................................................................................................................. 7

    Electrical installation Pinout....................................................................................................................................................................................................8

    DEUTSCH connector.................................................................................................................................................................. 8 Pin compatibility...............................................................................................................................................................................8 Input/output matrix........................................................................................................................................................................ 9 Mating connector.............................................................................................................................................................................9

    DEUTSCH connector parts list ............................................................................................................................................... 9

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Contents

    © Danfoss | June 2016 BC00000350en-US | 0101 | 3

  • MP1 Reference Literature

    Literature title Description Literature number

    MP1 Axial Piston Pumps Technical Information Complete product electrical and mechanical specifications

    BC00000352

    Latest version of technical literature

    Danfoss product literature is online at: http://powersolutions.danfoss.com/literature/

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Literature References

    4 | © Danfoss | June 2016 BC00000350en-US | 0101

    http://powersolutions.danfoss.com/literature/

  • Product Image

    Nomenclature

    Model code

    MP1 P

    Prod A B C D F H J T K E M N Z L V G W X Y

    D - Control

    Code Description

    SA2 EDC, 12V, Inch ports

    SA3 EDC, 24V, Inch ports

    SA4 EDC, 12V, Manual Over-Ride, Inch ports

    SA5 EDC, 24V, Manual Over-Ride, Inch ports

    MA4 EDC, 12V, Manual Over-Ride, Metric ports

    MA5 EDC, 24V, Manual Over-Ride, Metric ports

    Only certain control options for the MP1 pump utilize Electric Displacement Contro (EDC). Please refer to the pump’s nomenclature to determine if the pump is equipped with the proper option. The nomenclature can be found on the pump’s nametag.

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Product Overview

    © Danfoss | June 2016 BC00000350en-US | 0101 | 5

  • Theory of Operation

    EDC operation

    Electrical Displacement Control's (EDC) are current driven controls requiring a Pulse Width Modulated (PWM) signal. Pulse width modulation allows more precise control of current to the solenoids. The PWM signal causes the solenoid pin to push against the porting spool, which pressurizes one end of the servo piston, while draining the other. Pressure differential across the servo piston moves the swashplate. A swashplate feedback link, opposing control links, and a linear spring provide swashplate position force feedback to the solenoid. The control system reaches equilibrium when the position of the swashplate exactly balances the input command from the operator (solenoid). As hydraulic pressures in the operating loop change with load, the control assembly and servo/swashplate system work constantly to maintain the commanded position of the swashplate.

    The EDC incorporates a positive neutral deadband as a result of the control spool porting, preloads from the servo piston assembly, and the linear control spring. Once the neutral threshold current is reached, the swashplate is positioned directly proportional to the control current. To minimize the effect of the control neutral deadband, we recommend the transmission controller or operator input device incorporate a jump up current to offset a portion of the neutral deadband.

    The neutral position of the control spool does provide a positive preload pressure to each end of the servo piston assembly.

    When the control input signal is either lost or removed, or if there is a loss of charge pressure, the spring- loaded servo piston will automatically return the pump to the neutral position.

    A serviceable 125 μm screen is located in the supply line immediately before the control porting spool.

    An EDC is a displacement (flow) control. Pump swashplate position is proportional to the input command and therefore vehicle or load speed (excluding influence of efficiency), is dependent only on the prime mover speed or motor displacement.

    EDC proportional actuation

    0

    100 %

    100 %

    D is

    pl ac

    em en

    t

    Current mA

    Hydrostatic drive line power

    W 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.

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Product Overview

    6 | © Danfoss | June 2016 BC00000350en-US | 0101

  • Hydraulic schematics

    EDC

    C2 C1

    F00B F00A

    M 4

    T P Feedback from Swashplate

    Electrical specifications

    Pump displacement versus control current

    0 -b -a

    ba

    100 %

    100 %

    D is

    pl ac

    em en

    t

    Current mA

    EDC electrical specifications

    Voltage 12V 24V

    Threshold current (-a, a) 640 mA 335 mA

    End current (-b, b) 1640 mA 820 mA

    Maximum current 1800 mA 920 mA

    Rated power 18W

    Coil resistance at 20 °C [70 °F] 3.66 Ω 14.20 Ω

    Coil resistance at 80 °C [176 °F] 4.52 Ω 17.52 Ω

    PWM range 70 to 200 Hz

    PWM frequency* 100 Hz

    Inductance 33 mH 140 mH

    * PWM signal required for optimum control performance. Verify the PWM frequency is set correctly in the PLUS+1® controller. The default is set at 4000 Hz which will significantly reduce EDC performance.

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Product Overview

    © Danfoss | June 2016 BC00000350en-US | 0101 | 7

  • Pinout

    DEUTSCH connector

    Pin location

    1 2

    Pinout

    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 PWMOUT/DOUT/PVG Power supply

    1, 2 PWMOUT/DOUT/PVGOUT

    1, 2 Power ground -

    W Warning Unintended vehicle or machine movement hazard. Verify the wiring harness to ensure the correct PLUS +1® pin is properly connected to each control pin.

    Electrical Installation MP1 Pumps Electrical Displacement Control (EDC)

    Electrical installation

    8 | © Danfoss | June 2016 BC0000