250 0387

250 0387
Q U I C K
MM23001C
SCR, Adjustable Speed Drive
for DC Brush Motors
AC Line Voltage
115 VAC or 230 VAC 50/60Hz, single phase
Armature Voltage (115 VAC Input)
0 - 90 VDC
Armature Voltage (230 VAC Input)
0 - 180 VDC
Armature Current
10 1A
Form Factor
1.37 at base speed
HP Rating (90 VDC)
1/8 - 1 HP
HP Rating (180 VDC)
1/4 - 2 HP
Field Voltage (115 VAC Input)
50 VDC (F1 to L1); 100 VDC (F1 to F2)
Field Voltage (230 VAC Input)
100 VDC (F1 to L1); 200 VDC (F1 to F2)
Max. Field Current
1 ADC
Accel. Time Range:
for 0 - 90 VDC Armature Voltage
0.5 -11 seconds
for 0 - 180 VDC Armature Voltage
0.5 - 22 seconds
Decel. Time Range:
for 0 - 90 VDC Armature Voltage
coast to a stop - 13 seconds
for 0 - 180 VDC Armature Voltage
coast to a stop - 25 seconds
Analog Input Voltage Range (signal must be isolated; S1 to S2):
for 0-90 VDC Armature Voltage
0 - 1.4 VDC
for 0-180 VDC Armature Voltage
0 - 2.8 VDC
C503
F2
F1
SCR502
0.19 [5]
R501
R502
MO
V5
01
D503
MOV502
D502
A2
D501
L1
C501
L2
IC502
MOV503
3.58 [91]
SW501
A1
1.75 [44]
115
230
SO502
+
METER
S2
C502
IC501
C504
S3
INHIBIT
90
CL
180
SW502
IL501
S1
0.74 [19]
1
Requires heatsink 223-0159 when above 5 Amps
0.64 [16]
ACCEL
DECEL
MAX SPD
G U I D E
S P E C I F I C A T I O N S
D I M E N S I O N S
SCR501
S T A R T
MIN SPD
TORQUE
S T A R T U P
IR COMP
1. Turn the speed adjust potentiometer to “0” (full CCW)
0.19 [5]
1.60 [41]
1.28 [33]
2. Apply AC line voltage
3. Set the POWER switch to the ON position
0.96 [24]
3.80 [97]
4. Slowly advance the speed adjust potentiometer clockwise (CW). The
motor slowly accelerates as the potentiometer is turned CW. Continue
until the desired speed is reached.
4.30 [109]
5. Set the POWER switch to the OFF position to coast the motor to a stop.
M I N A R I K D R I V E S
w w w . m i n a r i k d r i v e s . c o m
14300 De La Tour Drive, South Beloit, IL 61080; Phone: (800) MINARIK (646-2745); Fax: (815) 624-6960
Document Number: 250-0387, Revision 1; Printed in the U.S.A. - May 2006
Copyright 2004 by Minarik Drives - All rights reserved. No part of this document may be reproduced or transmitted in any form without written permission from
Minarik Drives. The information and technical data in this document are subject to change without notice. Minarik Drives and its Divisions make no warranty of
any kind with respect to this material, including, but not limited to, the implied warranties of its merchantability and fitness for a given purpose. Minarik Drives and
its Divisions assume no responsibility for any errors that may appear in this document and make no commitment to update or to keep current the information in
this document. kc0604
C A L I B R A T I O N
S E T T I N G S
SCR501
MINIMUM SPEED (MIN SPD)
IR COMPENSATION (IR COMP)
The MIN SPD trimpot establishes the motor speed obtained in response to
The IR COMP trimpot setting determines the degree to which motor speed
the minimum input signal. It is factory set for zero speed.
is held constant as the motor load changes. It is factory set for optimum
D501
L1
MO
motor regulation.
F2
To calibrate the MIN SPD pot, apply the minimum signal. Adjust the MIN
SPD trimpot until the motor runs at the desired speed or is just at the
threshold of rotation.
D502
A2
V5
01
F1
Use the following procedure to recalibrate the IR COMP setting:
1. Set the IR COMP trimpot to minimum (full CCW).
2. Rotate the speed adjust potentiometer until the motor runs at midspeed
MOV503
without load (for example, 900 RPM for an 1800 RPM motor). A
MAXIMUM SPEED (MAX SPD)
The MAX SPD setting determines the maximum motor speed when the
speed adjust potentiometer, or voltage input signal is set for maximum
forward speed. It is factory set for maximum rated motor speed.
handheld tachometer may be used to measure motor speed.
L2
motor should slow down.
115
1. Set the MAX SPD trimpot full CCW.
forward speed.
S2
(overcompensation), the IR COMP trimpot may be set too high (CW).
Turn the IR COMP trimpot CCW to stabilize the motor.
5. Unload the motor.
2. Set the speed adjust potentiometer or voltage input signal for maximum
3. Adjust MAX SPD until the desired maximum forward speed is reached.
230
4. While keeping the load on the motor, rotate the IR COMP trimpot until
the motor runs at the speed measured in step 2. If the motor oscillates
To calibrate MAX SPD:
SW501
3. Load the motor armature to its full load armature current rating. The
C504
INHIBIT
TERMINALS
90
S3
INHIBIT
180
SW502
ACCELERATION (ACCEL)
The ACCEL setting determines the time the motor takes
to ramp to a higher speed. ACCEL is factory set for the fastest acceleration
Note: Check the MIN SPD and MAX SPD adjustments after recalibrating to
time (full CCW).
verify that the motor runs at the desired minimum and maximum speed.
TORQUE
The TORQUE setting determines the maximum torque for accelerating and
driving the motor. To calibrate TORQUE, use the following procedure:
1. With the power disconnected from the drive, connect a DC ammeter in
series with the armature.
2. Set the TORQUE trimpot to minimum (full CCW).
3. Set the speed adjust potentiometer or voltage reference signal to
maximum speed (full CW).
4. Carefully lock the motor armature. Be sure that the motor is firmly
To set the acceleration time:
1. Set the speed adjust potentiometer full CCW. The motor should run at
minimum speed.
2. Turn the speed adjust potentiometer full CW and measure the time it
takes the motor to go from minimum to maximum speed.
3. If the time measured in step 2 is not the desired acceleration time, turn
the ACCEL trimpot CW for a slower acceleration time, or CCW for a faster
acceleration time. Repeat steps 1 through 3 until the acceleration time is
correct.
mounted.
5. Apply line power. The motor should be stopped.
6. Slowly adjust the TORQUE trimpot CW until the armature current is
150% of motor rated armature current.
I N H I B I T
T E R M I N A L S
DECELERATION (DECEL)
The DECEL setting determines the time the motor takes to ramp to a lower
speed. DECEL is factory set for the fastest deceleration time (full CCW).
Short the INHIBIT terminals to coast the motor to
minimum speed (See Diagram Above for INHIBIT
terminal location). Open the INHIBIT terminals to
accelerate the motor to set speed.
Twist inhibit wires and separate them from powercarrying wires or sources of electrical noise. Use
shielded cable if the inhibit wires are longer than 18
inches (46 cm). If shielded cable is used, ground
only one end of the shield to earth ground. Do not
ground both ends of the shield.
7. Turn the speed adjust potentiometer CCW.
8. Remove line power.
To set the deceleration time:
9. Remove the stall from the motor.
1. Set the speed adjust potentiometer full CW. The motor should run at
10. Remove the ammeter in series with the motor armature if it is no
longer needed.
maximum speed.
2. Turn the speed adjust potentiometer full CCW and measure the time it
takes the motor to go from maximum to minimum speed.
Minarik Drives offers two accessory plug harnesses
for connecting to the INHIBIT terminals: part number
201-0024 [inhibit plug with 18 inches (46 cm) leads];
and part number 201-0079 [inhibit plug with 36
inches (91 cm) leads].
3. If the time measured in step 2 is not the desired deceleration time, turn
the DECEL trimpot CW for a slower deceleration time, or CCW for a
faster deceleration time. Repeat steps 1 through 3 until the deceleration
time is correct.
Document Number: 250-0387, Revision 1
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