Minarik MM101U User manual

SCR, Adjustable Speed Drives for DC Brush Motors
USER’S MANUAL
Models: MM101U
MM201U
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Copyright © 2001 by
Minarik Corporation
All rights reserved. No part of this manual may be reproduced or
transmitted in any form without written permission from Minarik
Corporation. The information and technical data in this manual are
subject to change without notice. Minarik Corporation 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 Corporation
and its Divisions assume no responsibility for any errors that may
appear in this manual and make no commitment to update or to keep
current the information in this manual.
Printed in the United States of America.
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i
Safety Warnings
•This symbol denotes an important safety tip or warning.
Please read these instructions carefully before performing any
of the procedures contained in this manual.
•DO NOT INSTALL, REMOVE, OR REWIRE THIS
EQUIPMENT WITH POWER APPLIED. Have a qualified
electrical technician install, adjust and service this equipment.
Follow the National Electrical Code and all other applicable
electrical and safety codes, including the provisions of the
Occupational Safety and Health Act (OSHA), when installing
equipment.
•Reduce the chance of an electrical fire, shock, or explosion by
proper grounding, over-current protection, thermal protection, and
enclosure. Follow sound maintenance procedures.
It is possible for a drive to run at full speed as a result
of a component failure. Minarik strongly recommends
the installation of a master switch in the main power input
to stop the drive in an emergency.
Circuit potentials are at 115 VAC or 230 VAC above
earth ground. Avoid direct contact with the printed
circuit board or with circuit elements to prevent the risk of
serious injury or fatality. Use a non-metallic screwdriver
for adjusting the calibration trimpots. Use approved
personal protective equipment and insulated tools if
working on this drive with power applied.

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Specifications 1
Dimensions 2
Installation 3
Mounting ..............................................3
Wiring.................................................4
Shieldingguidelines ....................................5
Speed adjust potentiometer connections .......................6
Heatsinking ............................................7
Linefusing .............................................7
Connections ............................................8
Motor connections .....................................8
Fieldoutput ..........................................9
Power connections ....................................9
Voltage follower connection ..............................11
Operation 12
Before applying power ...................................12
Drive startup and shutdown ...............................12
Toshutdownthedrive: ................................13
Reversing ..........................................13
Starting and Stopping Methods .............................13
Line stopping .......................................14
Decelerating to minimum speed ..........................14
Dynamic braking ......................................15
Calibration 17
Calibration procedure ....................................19
MINIMUM SPEED (MIN SPD) ...........................19
MAXIMUM SPEED (MAX SPD) ..........................20
REGULATION (IR COMP) ..............................20
ii
Contents
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TORQUE LIMIT (TORQUE) .............................21
ACCELERATION (ACCEL) .............................22
DECELERATION (DECEL) .............................23
Application Notes 24
FWD-STOP-REVswitch ..................................24
Reversing with dynamic braking ............................25
Reversing with a DLC600 .................................26
Independent Adjustable Speeds ............................27
Adjustable speeds using potentiometers in series ...............28
Multiple fixed speeds ....................................29
RUN/JOG switch .......................................30
Leader-follower application ................................31
Single speed potentiometer control of multiple drives ............32
Troubleshooting 33
Before troubleshooting ...................................33
ReplacementParts ......................................37
Unconditional Warranty inside back cover
iiiContents
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Figure 1. Dimensions ........................................2
Figure 2. Speed Adjust Potentiometer Installation ...................6
Figure 3. Power, Fuse and Motor Connections ....................10
Figure 4. Voltage Follower Connections ..........................11
Figure 5. Run/Decelerate to Minimum Speed Switch ................14
Figure 6. Dynamic Brake Connection ...........................16
Figure 7. Calibration Trimpot Layout ............................18
Figure8. FWD-STOP-REVSwitch..............................24
Figure 9. Reversing Circuit Connection ..........................25
Figure 10. Reversing with a DLC600 .............................26
Figure 11. Independent Adjustable Speeds .......................27
Figure 12. Adjustable Fixed Speeds Using Potentiometers in Series .....28
Figure 13. Multiple Fixed Speeds ...............................29
Figure 14. RUN/JOG Switch Connection to Speed Adjust Potentiometer . .30
Figure 15. Leader-Follower Application ...........................31
Figure 16. Single Speed Potentiometer Control of Multiple Drives .......32
Tables
Table 1. Replacement Line Fuse Sizes ..........................8
Table 2. Field Output Connections ............................10
Table 3. Recommended Dynamic Brake Resistor Sizes ............16
Table4. ReplacementParts .................................37
iv
Illustrations
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1
Specifications
Max. Max.
Input Input Armature
Voltage Current Current HP
Model (AC) (Amps AC) (Amps DC) Range Style
MM101U 115 10 10 1/4 - 1 Chassis
MM201U 230 10 10 1/2 - 2 Chassis
AC Line Voltage Tolerance ±10%, 50/60 Hz, single phase
Armature Voltage
MM101U 0 – 90 VDC
MM201U 0 – 180 VDC
Field Voltage (1 ADC max)
MM101U 50 – 100 VDC
MM201U 100 – 200 VDC
Maximum Output Field Current 1 ADC
Form Factor 1.37 at base speed
Accel. Time Range (for 0–90 VDC Armature Voltage) 0.5–8seconds
Decel. Time Range (for 0-90 VDC Armature Voltage) 0.5–8seconds
Analog Input Voltage Range for 0–90 VDC Armature Voltage
(signal must be isolated; S1 to S2) 0–5VDC
Input Impedance (S1 to S2) 100K ohms
Load Regulation 1% base speed or better
Vibration 0.5G max (0 – 50 Hz)
0.1G max (>50 Hz)
Ambient Temp. Range 10°C – 55°C
Weight 1.5 lb
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2
Dimensions
Figure 1. Dimensions
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3
Warning
Do not install, rewire, or remove this control with
power applied. Doing so may cause fire or serious injury.
Make sure you have read and understood the Safety
Warnings before attempting installation.
The chassis must be earth grounded. Use a star washer
beneath the head of at least one of the mounting screws to
penetrate the anodized chassis surface and to reach bare
metal.

• Drive components are sensitive to electrostatic fields. Avoid
direct contact with the circuit board. Hold drive by the
chassis only.
• Protect the drive from dirt, moisture, and accidental contact.
Provide sufficient room for access to the terminal block and
calibration trimpots.
• Mount the drive away from heat sources. Operate the drive
within the specified ambient operating temperature range.
• Prevent loose connections by avoiding excessive vibration of
the drive.
Installation
Mounting
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4 Installation
Warning
Do not install, remove, or rewire this equipment with
power applied. Failure to heed this warning may result in
fire, explosion, or serious injury.
Circuit potentials are at 115 or 230 VAC above ground.
To prevent the risk of injury or fatality, avoid direct
contact with the printed circuit board or with circuit
elements.
Do not disconnect any of the motor leads from the drive
unless power is removed or the drive is disabled.
Opening any one motor lead may destroy the drive.

Ꮨ
Use 18–24 AWG wire for speed adjust potentiometer wiring.
Use 14–16 AWG wire for AC line (L1, L2), field (F1, F2) and
motor (A1 and A2) wiring.
Wiring
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5Installation
Warning
Under no circumstances should power and logic leads be
bundled together. Induced voltage can cause
unpredictable behavior in any electronic device, including
motor controls.

As a general rule, Minarik recommends shielding of all
conductors.
If it is not practical to shield power conductors, Minarik
recommends shielding all logic-level leads. If shielding logic
leads is not practical, the user should twist all logic leads with
themselves to minimize induced noise.
It may be necessary to earth ground the shielded cable. If noise
is produced by devices other than the drive, ground the shield
at the drive end. If noise is generated by a device on the drive,
ground the shield at the end away from the drive. Do not
ground both ends of the shield.
If the drive continues to pick up noise after grounding the
shield, it may be necessary to add AC line filtering devices, or
to mount the drive in a less noisy environment.
Shielding guidelines
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6 Installation
Install the circular insulating disk between the mounting panel
and the 10K ohm speed adjust potentiometer (see Figure 2).
Mount the speed adjust potentiometer through a 0.38-inch
(10 mm) hole with the hardware provided. Twist the speed
adjust potentiometer wires to avoid picking up unwanted
electrical noise.
Figure 2. Speed Adjust Potentiometer Installation
Warning
Be sure that the potentiometer tabs do not make contact
with the potentiometer enclosure. Grounding the input will
cause damage to the drive.

Speed adjust potentiometer connections
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7Installation
Heat sinking
All MM101U and MM201U series drives contain sufficient
heat sinking in their basic configurations. No additional heat
sinking is required.
Line fusing
MM101U Series drives have a 15-amp line fuse mounted on
fuse holder 501 (FU501). MM201U Series drives have two 15-
amp line fuses mounted on fuse holders 501 and 502 (FU501
and FU502). When replacing the line fuses, use fast acting
fuses rated for 250 VAC or higher, and 150% of the armature
current. See Table 1 for recommended line fuse sizes.
Table 1. Replacement Line Fuse Sizes
90 VDC Motor 180 VDC Motor Max. DC Armature AC Line Fuse
Horsepower Horsepower Current (amps) Size (amps)
1/4 1/2 2.6 8
1/3 3/4 3.5 8
1/2 1 5.0 10
3/4 1 1/2 7.6 15
1 2 10.0 15
Minarik Corporation offers fuse kit 050–0073 (5–20A Fuse
Kit). See Replacement Parts (page 38) for fuse kit contents.
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8 Installation
Warning
Do not connect this equipment with power applied.
Failure to heed this directive may result in fire or serious
injury.
Minarik strongly recommends the installation of a master
power switch in the voltage input line. The switch
contacts should be rated at a minimum of 200% of motor
nameplate current and 250 volts.

Connect the power input leads, field output and DC motor to
the drive’s terminal board (PCB) as shown in Figure 3 (page
10).
Motor connections
Minarik drives supply motor voltage from A1 and A2
terminals. It is assumed throughout this manual that, when A1
is positive with respect to A2 , the motor will rotate clockwise
(CW) while looking at the output shaft protruding from the
front of the motor. If this is opposite of the desired rotation,
simply reverse the wiring of A1 and A2 with each other.
Connections
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9Installation
Use 18 AWG wire to connect the field output to a shunt
wound motor. See Table 2 for field output connections.
Table 2. Field Output Connections
Line Voltage Approximate Connec
Motor
(VAC) Field Voltage (VDC) Field To
115 50 F1 and L1
115 100 F1 and F2
230 100 F1 and L1
230 200 F1 and F2
Power connections
Connect the AC line power leads to terminals 2 (hot) and 7
(neutral), or to a double-throw, single-pole master power switch
(recommended).
Warning
The field output is for shunt wound motors only. Do not
make any connections to F1 and F2 when using a
permanent magnet motor.

Connect a DC motor to terminals 8 (A1) and 9 (A2) as shown
in Figure 3. Ensure that the motor voltage rating is
consistent with the drive’s output voltage.
Field output
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10 Installation
Figure 3. Power, Fuse and Motor Connections
NOTES:
1. DO NOT CONNECT FIELD OUTPUT IF USING A PERMANENT-MAGNET
MOTOR. REFER TO TABLE 2 (PAGE 9) FOR ALTERNATE FIELD
CONNECTIONS.
WARNING
DO NOT APPLY 230 VAC
IF USING MM101U
SERIES DRIVE

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11Installation
Figure 4. Voltage Follower Connections
Instead of using a speed adjust potentiometer, the drive may be
wired to follow a 0-5 VDC analog input voltage signal that is
isolated from earth ground (Figure 4). Connect the signal input
(+) to terminal 9. Connect the signal common (–) to terminal
8. Make no connection to teminal 10.
A potentiometer can be used to scale the analog input voltage.
An interface device, such as Minarik model PCM4, may be
used to scale and isolate an analog input voltage.
Voltage follower connection
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12
Before applying power
• Verify that no conductive material is present on the printed
circuit board.
• Verify that the AC supply is properly balanced.
Drive startup and shutdown
1. Set the reference signal or speed adjust potentiometer to
minimum speed.
2. Apply AC line voltage.
3. Slowly turn the speed adjust potentiometer or increase the
reference voltage until the desired speed is reached.
Warning
Dangerous voltages exist on the drive when it is powered.
BE ALERT. High voltages can cause serious or fatal
injury.

Operation
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13Operation
Warning
For frequent starts and stops, use dynamic braking or
decelerating to minimum speed (shorting terminal 8 to
terminal 9). Do not use any of these methods for
emergency stopping. They may not stop a drive that is
malfunctioning. Removing AC line power (both L1 and
L2) is the only acceptable method for emergency
stopping.
Minarik strongly recommends the installation of an
emergency stop switch for chassis drives. The switch
contacts should be rated at a minimum of 250 volts and
200% of maximum motor current.

To shut down the drive:
To decelerate the motor from set speed to a stop, set the speed
adjust potentiometer to minimum speed. To coast the motor
from set speed to a stop, remove AC line voltage from the
drive.
Reversing
Refer to Application Notes (page 24) for reversing options, or
contact your Minarik sales representative.
Starting and Stopping Methods
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14 Operation
Line stopping
When AC line voltage is applied to the drive, the motor
accelerates to the set speed. When AC line voltage is removed,
the motor coasts to a stop. Line stopping (removing AC line
voltage) is recommended for stopping in emergency situations
only. It is not recommended for frequent starting and stopping.
Decelerating to minimum speed
The switch shown in Figure 5 may be used to decelerate a
motor to a minimum speed. Closing the switch between
terminals 8 and 9 decelerates the motor from set speed to a
minimum speed determined by the MIN SPD trimpot setting.
If the MIN SPD trimpot is set full CCW, the motor decelerates
to zero speed when the switch between terminals 8 and 9 is
closed. The DECEL trimpot setting determines the rate at
which the drive decelerates. By opening the switch, the motor
accelerates to set speed at a rate determined by the ACCEL
trimpot setting.
Figure 5. Run/Decelerate to Minimum Speed Switch
10
9
8
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