ELECTROMEN EM-176A User manual

EM-176A DC-MOTOR CONTROLLER 12/24Vdc 10A
FEATURES:
• 4 Quadrants
• Braking
• Freewheeling
• Reversal
• 0...10V control
• Optional ±10V control
• Soft start ramp
• Adjustable current limit
• Load compensation ( RxI )
• High efficiency
• High peak loading capacity
• Rail mountable
Supply
Over voltage protection
Idle current
Motor current
Motor voltage
Current limit
Current lim. volt. ctrl
Ramp time
Voltage loss
Operating freq.
Aux. voltages
Set value range
Set value input imp.
Control voltage
Control input imp.
Operating temp ( Ta )
Measures
Weight
12-35Vdc
39V
appox. 30mA
10A cont. ( Ta<50°C )
15A peak ( 20% on/ 80% off )
0-29V ( 0-100%)
adj. 0...15A
0...5V ( 0...15A )
adj. 0...3s
1.2V ( Im=10A )
25kHz
+5V 10mA ( option -5V )
0...5 or 0...10V
( ±5V or ±10V option )
100kohm ( pin 7 and 9 )
"on" when Uin 4 -30V
"off" when Uin 0-1V or open
10kohm ( pin 5, 6 and 8 )
-20...+70
65x73x30mm
approx. 100g
CURRENT
AND
VOLTAGE
CONTROL
EM-176 BLOCK DIAGRAM
BRAKE
CURRENT SET
CURRENT LIMIT
7
4
5
DIR
RANGE
SCALE
SPEED
SET
5V/ 10mA
9
8
6
10
FREEWHEEL
RxI
RAMP
EM-A1
bipolar
card
optio nal
MOTOR-
CURRENT
MEAS.
Im
+
POWER
STAGE
Um
VOLTAGE
REG.
-
2
M
3
SUPPLY
4
1
100R
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EM-176A is designed for DC-motor speed control. The unit can be used with unregulated DC supply. Motor loading can
be compensated with inbuilt RxI-type adjustment. EM-176A utilizes PWM driven H-bridge, thus achieves high efficiency
and extensive controlling options. Speed control value can be set with voltage signal or with potentiometer, there is an
auxiliary voltage signal output for potentiometer use. The scale trimmer can be used to scale set value to correspond
better the motor rpm. An auxiliary card can be fitted into EM-176A for bipolar input controlling with voltage signal or
potentiometer. The ramp feature is used to limit the motor start and brake speed, in other words soften the operation and
prevent the occurrence of current spikes. The current limit limits motor torque that is current; this protects the motor and
the mechanics. The unit has separate inputs for brake, freewheel and reverse. Brake short-circuits the motor poles and
produces powerful braking. Freewheel detaches the power stage from the motor and leaves motor rotating freely. Reverse
changes motor rotating direction, this is done using the set ramp times.
Brake and freewheel bypass the ramp feature.
Technical data
ELECTROMEN Oy
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INSTALLATION EM-176A
Supply voltage 12-35VDC, ripple <30% at full load.
CAUTION ! Wrong polarity may damage the device.
CAUTION ! The device is not equipped with an internal
fuse.
SETTINGS AND ADJUSTMENTS
Set trimmers in center position. Current limit can be set in
the range of 0-15A. If an external voltage signal (0-5V) or
potentiometer is used to set the current limit, set the inbuilt
current limit trimmer to 0-position.
The compensation (RxI) is used as follows: first set the
motor running slowly. Then increase compensation until the
motor starts twitching. Now decrease compensation a little
so that the twitching ends. Finally test the operation: when
loading the motor, the rotation speed should almost remain
constant.
The acceleration- and braking ramp are set with trimmers in
the range of 0-3s (the time from zero to full speed or vice
versa). The speed can be set with potentiometer or with 0-5V
voltage signal. With the set value trimmer the set value
range can be scaled to match the motor rotating speed range.
If the use of bipolar control signal is desired, an auxiliary
card EM-A1 can be fitted onboard, which makes it possible
to use either ±5V or ±10V control voltage signals. EM-A1
card also gives -5V auxiliary voltage into pin8; this enables
potentiometer to be used to control both speed and direction
(forward-stop-reverse).
EM-176A WIRING AND INSTALLATION
EXAMPLE 2
CONTROLLING WITH VOLTAGES.
CURRENT 0-5V CORRESPONDS TO 0-15A.
CURRENT LIMIT TRIMMER IS SET TO MIN.
SPEED 0-5V CORRESPONDS TO 0-100%
SPEED. SCALE WITH TRIMMER.
DIRECTION, FREEWHEEL OR BRAKE
0-1V OR OPEN=OFF, 4-30V=ON.
EXAMPLE 1
CONTROLLING WITH SWITCHES.
SPEED SET WITH POTENTIOMETER.
SPEED RANGE ADJUSTABLE WITH
SPEED SET RANGE ADJUSTMENT.
CURRENT LIMIT CAN BE SET WITH
INBUILT TRIMMER. IF EXTERNAL
ADJUSTMENT IS USED, SET THE
INBUILT CURRENT LIMIT TRIMMER
TO MINIMUM.
EXAMPLE 3 (OPTIONAL)
EM-A1 BIPOLAR-CARD INSTALLED.
CONTROLLING WITH POTENTIOMETER
FORWARD/REVERSE OR WITH VOLTAGE
SIGNAL (±5V OR LARGER BIPOLAR
VOLTAGE). RANGE ADJUSTABLE WITH
RANGE SCALE TRIMMER ADJUSTMENT.
OTHER CONTROLS AS IN PREVIOUS
EXAMPLES.
10
BRAKE
GND 0V
4 5
FREEWH.
6 7
CURRENT
98
+5V
10
DIR.
SPEED
Im Um
BRAKE
54
GND 0V
FREEWH.
CURRENT SET
DIR. SPEED
+5V
9876
REVERSE / FORWARD
POT. IN THE MIDDLE=STOP
10
BRAKE
FREEWH.
5
GND 0V
4 9
-5V
876
+5V
SPEED +DIR.
EM-A1 card slot,
normally 2 jumps
set value
scale
V / 0-100%
BRAKE
CAUTION !
Wrong polarity can damage the device.
Select a fuse (1-16A) in accordance
with the application.
+12-32V
MOTOR
321
SUPPLY
DC-
-
+
4
GND 0V
72mm 66mm
10
0-5V
SPEED SET
5 6 7 8 9
DIR.
+5V
CURR. SET
FREEWH.
min
max
15
59mm
65mm
8
0-10
0-24V
0
3ramp / s
1
2
Motor
load
compensation
0current lim / A 4
ELECTROMEN Oy
www.electromen.com