Danfoss MCE121A Load Controller User guide
- Type
- User guide
MCE121A
Load Controller
Technical
Information
Phased Out Products
2
BLN-96-9208-E • Rev. C • 08/2001
MCE121A Load Controller
Technical Information
Overview
© 2001, Sauer-Danfoss
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 ordered provided that such alterations can be made without
subsequent changes 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.
DESCRIPTION
TECHNICAL DATA
The Sauer-Danfoss MCE121A Load Controller is used in applications requiring constant
engine RPM under dynamic load conditions. Shedding load upon encountering obsta-
cles avoids engine stall, prolongs engine life and maximizes fuel effi ciency.
FEATURES • Adjustable output current.
• Antistall function.
• Nearly constant PTO speed.
• 12 V
DC
or 24 V
DC
supply voltage.
• Reverse polarity and short circuit protected.
• Moisture and corrosion resistant.
• Withstands vibration and shock.
ORDERING INFORMATION
Controller Supply voltage Frequency range Id. No.
[V
DC
] [Hz]
MCE121A1001 12 or 24 500 - 2000 791566
MCE121A1002 12 or 24 1500 - 6000 791574
Supply voltage: 12 V
DC
or 24 V
DC
Ripple: ≤ 10 %
Max. output voltage: 6 V
DC
Power load: 4,2 W or 8,4 W
Frequency range: see ordering information
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BLN-96-9208-E • Rev. C • 08/2001
MCE121A Load Controller
Technical Information
Block Diagram
BLOCK DIAGRAM
S00424a
Switch closed: Controller ON
Machine frame
Controller OFF/ON
EDC
MCV104A
MCV105A
MCV111A
Engine
PPU
Battery
12 or 24V
DC
-+
F
DC
12V
DC
24V
LED
supply voltage
U
STAB
U
STAB
2
Setpoint
f
V
+
-
LED
RPM
ENGINE
V
t
Voltage regulator
V
t
I
MAX
I
V
t
PDT 1
P-gain
max. current
reduction
-
+
LED
setpoint
-
+
Controller
choice
or
K
1A
1
1
A
B
4
6
5
9
3
2
1
11
10
Speed handle
PTO
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BLN-96-9208-E • Rev. C • 08/2001
MCE121A Load Controller
Technical Information
ENGINE
α
0
SETPOINT
RPM
RPM
RPM
100%
MAX
PUMP
Ι
0
100%
OUT
Theory of Operation
THEORY OF OPERATION The Load Controller MCE121A is used to reduce the power requested from the propel
transmission under conditions which would otherwise overload the engine.
If the engine speed droops due to heavy loading, the resulting measured speed is com-
pared to a desired engine speed setpoint. If this setpoint is exceeded, the Controller
reduces the output current.
The adjustable control parameters are shown in fi gure 1.
The reduction of the output current (see fi gure 2) to the EDC, causes a reduced power
request from the propel transmission. That means the engine speed for the PTO is nearly
constant.
The step response of the Load Controller after a load jump is shown in fi gure 3.
Generally the propel speed is set with a control handle in series to the Controller output
(see block diagram).
OPERATION DIAGRAMS Figure 1: Adjustable control parameters Figure 3: Step response of the Load Controller
Figure 2: output current reduction
S01748_31e
S01748_29e S01748_08e
R66
R70
P-gain
R44
R22
ENGINE
Ι
Ι
0
SETPOINT
MIN
Ι
MAX
RPM
RPM
RPM
MAX
0
t
Ι
100%
RPM
0 t
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BLN-96-9208-E • Rev. C • 08/2001
MCE121A Load Controller
Technical Information
ITT Cannon-connector, 19-pin
Machine frame
Controller OFF/ON
EDC
MCV104A
MCV105A
MCV111A
PPU
Terminals
Engine
Switch closed: Controller ON
1
1
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
F
1A
Battery
12 or 24V
DC
+
+
-
-
choice
DC
12V
DC
24V
or
F
1A
A
B
Control Handle
PTO
+ A B -
DIMENSIONS
S00443
S00380
Dimensions and Connection Diagram
CONNECTION DIAGRAM
R1,6 (4x)
47,6
56,1
18,4
Mounting holes
4,3 (2x)
3,5
5,5
5,5
100
3,5
160
25
3,2 (4x)
43
63
max. 3,5
max. 30
12
R66
R44
H
G
F
E
D
C
B
A
MP
V9
V25
V19D
V19C
V19B
V19A
R22
R70
Phased Out Products
Sauer-Danfoss Hydraulic Power Systems
– Market Leaders Worldwide
Sauer-Danfoss is a comprehensive supplier providing complete
systems to the global mobile market.
Sauer-Danfoss serves markets such as agriculture, construction, road
building, material handling, municipal, forestry, turf care, and many
others.
We offer our customers optimum solutions for their needs and
develop new products and systems in close cooperation and
partner ship with them.
Sauer-Danfoss specializes in integrating a full range of system
components to provide vehicle designers with the most advanced
total system design.
Sauer-Danfoss provides comprehensive worldwide service for its
products through an extensive network of Authorized Service
Centers strategically located in all parts of the world.
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
Sauer-Danfoss (Nordborg) A/S
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
www.sauer-danfoss.com
OUR PRODUCTS
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Sensors
BLN-96-9208-E • Rev. C • 08/2001
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Danfoss MCE121A Load Controller User guide
- Type
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