SAUER-DANFOSS MCE125A Ramp Card Amplifier User Guide
- May 15, 2024
- SAUER-DANFOSS
Table of Contents
MCE125A Ramp Card Amplifier
Technical Information
Overview
DESCRIPTION
The Sauer-Danfoss MCE125A Ramp Card Amplifier provides a time-delayed control
for MCV104A, MCV105A or MCV111B Electrical Displacement Controls (EDC) for
hydrostatic transmissions. The adjustable ramptime is the same for up and
down. The Amplifier operates uni- or bidirectionally.
FEATURES
- Proportional driving of an EDC with a potentiometer.
- Adjustable output current.
- Adjustable ramptime (0 – 8 seconds).
- ON/OFF switching of the delay time possible.
- Operates uni- or bidirectionally.
- Simple adjustments.
- 12 V DC or 24 V DC supply voltage.
- Reverse polarity and short circuit protected.
- Withstands vibration and shock.
ORDERING INFORMATION
| Controller | Supply voltage [V DC] | Ramp time [seconds] | Id. No. |
|---|---|---|---|
| MCE125A1001 | 12 or 24 | 0 – 8 | 662338 |
| MCE125A1002 | 12 or 24 | 0 – 20 | 502539 |
TECHNICAL DATA
Supply voltage: 12 V DC or 24 V DC
Ripple: ≤ 20 %
Power load: 3,6 W or 7,2 W
Setpoint: External potentiometer 5 kΩ ± 10 %, ≥ 1 W
EDC ADJUSTMENT
Output current range: 40 mA – 150 mA (at 23 Ω)
Adjustable ramptime: 0 – 8 seconds (Up or Down)
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Sauer-Danfoss can accept no responsibility for possible errors in catalogues,
brochures and other printed material. Sauer -Danfoss reserves the right to
alter its products without prior notice. This also applies to products already
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being necessary in specifi cations already agreed. All trademarks in this
material are properties of the respective companies.
Sauer-Danfoss and the Sauer-Danfoss logotype are trademarks of the Sauer-
Danfoss Group. All rights reserved.
Block Diagram
BLOCK DIAGRAM
Theory of Operation
THEORY OF OPERATION
General
The MCE125A Ramp Card Amplifier can be powered with 12 V DC (PIN 30) or 24 V
DC (PIN 31). Both inputs are protected by 680 mA fuses.
The external fuse should be 480 mA.
The external setpoint potentiometer should be 5 kΩ ± 10 %, ≥ 1W. The
potentiometer will be supplied by an internally generated stabilized voltage.
As shown in the connection diagram, it is possible to work with the ramp card
in uni- or bidirectional mode.
Two way contacts, open or closed depending on neutral position, are available
for such things as neutral start. The ramptime is adjustable with the
potentiometer R5 over 0 –
8 seconds. The neutral adjustment of the output current is adjustable with R12
and the maximum output current with R39.
Unidirectional Operation
The setpoint potentiometer is connected to pins 24, 26 and 28 (see figures 1
and 2).
Bidirectional Operation
The setpoint potentiometer is connected to pins 22, 26 and 28 (see figures 3
and 4). In the center position of the potentiometer (neutral position) the
value of the output current is <± 5 mA. In this range a neutral position
sensor switches off to the EDC and defines a true neutral position.
OPERATION DIAGRAMS
Dimensions and Connection Diagram
CONNECTION DIAGRAM
OUR PRODUCTS
Hydrostatic transmissions
Hydraulic power steering
Electric power steering
Closed and open circuit axial piston pumps and motors
Gear pumps and motors
Bent axis motors
Radial piston motors
Orbital motors
Transit mixer drives
Planetary compact gears
Proportional valves
Directional spool valves
Cartridge valves
Hydraulic integrated circuits
Hydrostatic transaxles
Integrated systems
Fan drive systems
Electrohydraulic controls
Digital electronics and software
Battery powered inverter
Sensors
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Sauer-Danfoss (US) Company
2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239-6000, Fax: +1 515 239-6618
Sauer-Danfoss (Neumünster) GmbH & Co. OHG
Postfach 2460, D-24531 Neumünster
Krokamp 35, D-24539 Neumünster, Germany
Phone: +49 4321 871-0, Fax: +49 4321 871-284
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DK-6430 Nordborg, Denmark
Phone: +45 7488-4444, Fax: +45 7488-4400
Sauer-Danfoss (US) Company
3500 Annapolis Lane North
Minneapolis, MN 55447, USA
Phone: +1 763 509-2084, Fax: +1 763 559-0108
BLN-96-9211-E • Rev. C • 08/2001