1
BLN-96-9261-2E
1 2345 6 7 8
1,6A
F
MCE127A1000
Proportional Amplifier
The SAUER-SUNDSTRAND MCE127A1000 Propor-
tional Amplifier is used to drive SAUER-SUNDSTRAND
hydrostatic transmissions equipped with proportional
magnets.
This MCE127A1000 Proportional Amplifier is equipped
with a single output.
DESCRIPTION
BLN-96-9261-2E Issued: October 1999
FEATURES
• Reverse polarity and short circuit protected
• Withstands vibration and shock
• Current sense PWM drive
• 12V
DC
or 24V
DC
supply voltage
TECHNICAL DATA
OPERATING FREQUENCY
appr. 100Hz (adjustable 80 - 200Hz)
SWITCHING OUTPUT
Current source
Voltage and temperature compensated
Short circuit protected
INDICATIONS
1 LED red: power supply
1 LED green: valve power
SUPPLY VOLTAGE
10V
DC
to 35V
DC
, reverse polarity protected
POWER LOAD
MIN: appr. 40mA
MAX: 1,6A
I
MIN
ADJUSTABLE
0 to 600mA
I
MAX
ADJUSTABLE
I
MIN
to 1500mA
RAMP TIME
independent adjustable 0,5 to 10s
ORDERING INFORMATION
Amplifier Supply voltage Id. No.
MCE127A1000 12V
DC
or 24V
DC
501453
Copyright 1999, SAUER-SUNDSTRAND COMPANY.
All rights reserved. Printed in Germany.
Contents subject to change.
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BLN-96-9261-2E
BLOCK DIAGRAM: unidirectional
S00926
U
t
100Hz
Current source
+
Battery
12 or 24V
DC
-
+
Engine
Proportional
valve
+
0,5Ω
5
6
1
2
56Ω
56Ω
3
8
7
Ramp
Ramp
cw
Setpoint
potentiometer
1kΩ to 5kΩ
8V
8V
Ι
MAX
Ι
MIN
F
1,6A
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BLN-96-9261-2E
THEORY OF OPERATION
S00927
The MCE127A1000 Proportional Amplifier allows the
independent adjustment of the minimum output current
I
MIN
and the maximum output current I
MAX
.
The ramp time t
UP
and t
DOWN
are adjustable independently
also.
The external setpoint potentiometer sets the output
current.
The operation frequency (standard 100Hz) is adjustable
to tune the amplifier for a special valve.
Two diagnostic LEDs show the presense of power
supply and the status of the output stage.
DIMENSIONS
M6
Sealing compound
ø 6,1
12
14,4
104,4
82
ø 9,5
9
LED output
Ramp
Output
Ι
MIN
Output
Ι
MAX
Ramp
Ι
PROP.VALVE
LED Supply voltage
Operating frequency
UP
DOWN
20,2
14,2
1 2345 6 7 8
1,6A
F
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BLN-96-9261-2E
CONNECTION DIAGRAM: Proportional input
S00925
CONNECTION DIAGRAM: Switch input
S00924
2
3
4
5
6
7
8
1
Prop.Ventil (+)
0V Potentiometer
8V Potentiometer
Battery (-)
Battery (+)
Wiper
Terminals, 8-pin
Prop.Ventil (-)
Ι
Setpoint
potentiometer
1kΩ to 5kΩ
Battery
12 or 24V
DC
-+
Proportional valve
MAX
Ι
MIN
2
3
4
5
6
7
8
1
Prop.Ventil (+)
0V Potentiometer
8V Potentiometer
Battery (-)
Battery (+)
Wiper
Terminals, 8-pin
Prop.Ventil (-)
Battery
12 or 24V
DC
-+
Proportional valve
Switch
Ι
MAX
Ι
MIN
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