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Summary of Contents for Minarik MM21051C
- Page 1 USER’S MANUAL SCR Filtered Series Filtered SCR, Adjustable Speed Drives for DC Brush Motors Models: MM21051C MM21151C MM21251C...
- Page 2 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.
- Page 3 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.
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Page 4: Table Of Contents
Power input ..........16 Voltage follower (MM21051C only) ....... .17 Operation . -
Page 5: Tables
Inhibit terminal accessories ........22 Decelerating to minimum speed ....... .23 Dynamic braking . - Page 6 Figure 1. MM21051C Dimensions ........2...
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Page 7: Specifications
Analog Input Voltage Range (0–130 VDC Armature Voltage)* 0 – 5.7 VDC Input Impedance (S1 to S2) 45KΩ Load Regulation 1% of base speed or better Ambient Temp. Range MM21051C 10°C–55°C MM21151C, MM21251C 10°C–40°C Vibration 0.5 G max. (20 – 50 Hz) 0.1 G max. (>50 Hz) -
Page 8: Dimensions
Dimensions ALL DIMENSIONS IN INCHES [MILLMETERS] FOUR (4) MOUNTING SLOTS 0.188 [5] WIDE Figure 1. MM21051C Dimensions... -
Page 9: Figure 2. Mm21151C Dimensions
Dimensions ALL DIMENSIONS IN INCHES [MM] Figure 2. MM21151C Dimensions... -
Page 10: Figure 3. Mm21251C Dimensions
Dimensions ALL DIMENSIONS IN INCHES [MM] Figure 3. MM21251C Dimensions... -
Page 11: Figure 4. Mm21151C And Mm21251C Back View Cased Mounting Keyhole
Figure 4. MM21151C and MM21251C Back View Cased Mounting Keyhole Locations... -
Page 12: Installation
Installation Installation Warning Do not install, rewire, or remove this control with input power applied. Doing so may cause fire or serious injury. Make sure you have read and understood the Safety Warnings before attempting installation. Mounting Drive mounting (General) •... -
Page 13: Drive Mounting (Chassis Drives)
Installation Drive mounting (Chassis drives) • Mount the drive with its board in either a horizontal or vertical plane. Eight 0.188 inch (4.8 mm) wide slots in the chassis accept #8 pan head screws. Fasten either the large base or the narrow flange of the chassis to the subplate. -
Page 14: Wiring
Installation Wiring 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 VAC above ground. To prevent the risk of injury or fatality, avoid direct contact with the printed circuit board or with circuit elements. -
Page 15: Shielding Guidelines
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-leve leads is not practical, the user should twist all logic leads with themselves to minimize induced noise. -
Page 16: Heat Sinking
Installation Heat sinking All MM21X51C drives have sufficient heat sinking in their basic configurations. No additional heat sinking is required. Line fuses All drives have line fuses installed (see Replacement Parts section for installed line fuse size). Line fuses are rated for maximum rated current. -
Page 17: Field Output
Installation Field output 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. Table 2. Field Output Connections Approximate Connect Motor Field Voltage (VDC) Field To F1 and L1 F1 and F2... -
Page 18: Screw Terminal Block
Screw terminal block Connections to these drives are made to a screw terminal block (Figure 5). The chassis model (MM21051C) has 9 screws on the terminal block. The cased models (MM21151C, and MM21251C) have 7 screws on the terminal block. Using a screwdriver, turn the terminal block screw counter-clockwise to open the wire clamp. -
Page 19: Speed Adjust Potentiometer Installation
Installation 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. Install the circular insulating disk between the panel and the 10K ohm speed adjust potentiometer. -
Page 20: Connections
250 volts. Chassis drives Motor 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. -
Page 21: Cased Drives
Motor Connect a DC motor to terminals A1 and A2 as shown in Figure 8, page 16. 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. -
Page 22: Power Input
Installation Power input Connect the AC power line leads to terminals L1 and L2 as shown in Figure 8. Figure 8. MM21151C and MM21251C Connections... -
Page 23: Voltage Follower (Mm21051C Only)
S1. Make no connection to S3. A potentiometer can be used to scale the analog input voltage. To achieve isolation, use an interface device such as Minarik model PCM4 to scale the analog input voltage. Figure 9. Voltage Follower Connections... -
Page 24: Operation
1. Check connections before applying AC line voltage to the drive. 2. Check that no conductive material is present on the printed circuit board. Startup MM21051C 1. Turn the speed adjust potentiometer full counterclockwise (CCW), or the reference voltage to zero (if in voltage follower mode). -
Page 25: Mm21151C
Operation MM21151C 1. Turn the speed adjust potentiometer full counterclockwise (CCW). 2. Apply AC line voltage 3. Set the POWER switch to the ON position. 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. -
Page 26: Starting And Stopping Methods
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. The switch contacts should be rated at a minimum of 250 volts and 200% of maximum motor current. -
Page 27: Inhibit Circuit (Mm21051C Only)
Maintaining a connection between the inhibit pins causes the motor to coast to zero speed. Removing the connection between the inhibit pins allows the motor to accelerate to the speed set by the speed adjust potentiometer (Figure 10). Figure 10. Inhibit Circuit Connections (MM21051C only) -
Page 28: Inhibit Terminal Accessories
Operation Inhibit terminal accessories Minarik Corporation offers two accessory plug harnesses for the INHIBIT terminals, as shown in Table 3. Table 3. Inhibit Plug Part Numbers Minarik Part Number Description 201-0024 Inhibit plug with 18 in. (46 cm) wires 201-0079 Inhibit plug with 36 in. -
Page 29: Decelerating To Minimum Speed
Operation Decelerating to minimum speed The circuit shown in Figure 11 may be used to decelerate a motor to a minimum speed. Closing the switch between S1 and S2 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 S1 and S2 is closed. -
Page 30: Dynamic Braking
10 watts. The motor stops less rapidly with higher brake resistor values. Certain Minarik drives coast to minimum speed when the inhibit terminals are shorted to each other. IR COMP and TORQUE are still active while the drive is in the inhibit mode. -
Page 31: Figure 12. Dynamic Braking Circuit Connection
Operation Figure 12. Dynamic Braking Circuit Connection... -
Page 32: Calibration
Calibration Warning Dangerous voltages exist on the drive when it is powered. When possible, disconnect the voltage input from the drive before adjusting the trimpots. If the trimpots must be adjusted with power applied, use insulated tools and the appropriate personal protection equipment. BE ALERT. High voltages can cause serious or fatal injury. -
Page 33: Figure 13. Calibration Trimpot Layouts
Calibration MM21051C MM21151C/MM21251C Figure 13. Calibration Trimpot Layouts... -
Page 34: Minimum Speed (Min Spd)
Calibration Minimum Speed (MIN SPD) The MIN SPD setting determines the minimum speed when the speed adjust potentiometer is turned full CCW. It is factory set to zero speed. To calibrate, set the speed adjust potentiometer full CCW. Adjust the MIN SPD trimpot until the motor has stopped, or is running at the desired minimum speed. -
Page 35: Deceleration (Decel)
Calibration Deceleration (DECEL) The DECEL setting determines the time the motor takes to ramp to lower speed, within the limits of available torque. The DECEL setting is factory set for its fastest deceleration time. Turn the DECEL trimpot CW to increase the deceleration time, and CCW to decrease the deceleration time. -
Page 36: Torque
If you intend to operate beyond the rating, contact your Minarik representative for assistance. The TORQUE setting determines the maximum armature current output of the drive. It is factory set at 120% of rated motor current. -
Page 37: Figure 14. Typical Torque And Ir Comp Settings (Actual Settings May Vary With Each Application)
Calibration Figure 14. Typical TORQUE and IR COMP Settings (actual settings may vary with each application) -
Page 38: Application Notes
Application Notes Multiple fixed speeds Replace the speed adjust potentiometer with series resistors with a total series resistance of 10K ohms (Figure 15). Add a single pole, multi-position switch with the correct number of positions for the desired number of fixed speeds. Figure 15. -
Page 39: Adjustable Speeds Using Potentiometers In Series
Application Notes Adjustable speeds using potentiometers in series Replace the speed adjust potentiometer with a single pole, multi- position switch, and two or more potentiometers in series, with a total series resistance of 10K ohms. Figure 16 shows a connection for fixed high and low speed adjust potentiometers Figure 16. -
Page 40: Independent Adjustable Speeds
Application Notes Independent adjustable speeds Replace the speed adjust potentiometer with a single pole, multi- position switch, and two or more potentiometers in parallel, with a total parallel resistance of 10K ohms. Figure 17 shows the connection of two independent speed adjust potentiometers that can be mounted at two separate operating stations. -
Page 41: Run/Jog Switch
Application Notes RUN/JOG switch Using a RUN/JOG switch is recommended in applications where quick stopping is not needed and frequent jogging is required. Use a single pole, two position switch for the RUN/JOG switch and a single pole, normally closed, momentary operated pushbutton for the JOG pushbutton. -
Page 42: Figure 19. Run/Jog Switch Connection To Speed Adjust Potentiometer
Application Notes In the second wiring option, connect the RUN/JOG switch and the JOG pushbutton as shown is Figure 19. When the RUN/JOG switch is set to JOG, the motor decelerates to minimum speed (minimum speed is determined by the MIN SPD trimpot setting). -
Page 43: Reversing
Application Notes Reversing A dynamic brake may be used when reversing the motor direction (Figure 20). For the RUN/BRAKE switch, use a four pole, three position switch rated for at least 125 VDC, 6 Amps. The dynamic braking resistor should be ceramic encased, and a minimum of 25W, 10 watts. -
Page 44: Leader-Follower Application
Application Notes Leader-Follower application In this application, use a PCM4 to monitor the speed of the leader motor (Figure 21). The PCM4 isolates the leader motor from the follower drive, and outputs a voltage proportional to the leader motor armature voltage. The follower drive uses this voltage reference to set the speed of the follower motor. -
Page 45: Single Speed Potentiometer Control Of Multiple Drives
Application Notes Single speed potentiometer control of multiple drives Multiple drives can be controlled with a single speed adjust potentiometer using a PCM4 at the input of each drive to provide isolation (Figure 22). Optional ratio potentiometers can be used to scale the PCM4 output voltage, allowing independent control of each drive. -
Page 46: Troubleshooting
7. Check that the drive’s rated armature and field outputs are consistent with the motor ratings. For additional assistance, contact your local Minarik distributor, or the factory direct: (800) MINARIK (phone) or (800)646-2745 (800) 394-6334 (fax) - Page 47 Troubleshooting Suggested Problem Possible Solutions Causes 1. Check that the line Line fuse blows. 1. Line fuse is the fuse is correct for wrong size. the motor size (page 10). 2. Check motor cable 2. Motor cable or and armature for armature is shorted shorts.
- Page 48 Troubleshooting Suggested Problem Possible Solutions Causes 1. Increase the speed Line fuse does not 1. Speed adjust adjust pot or blow, but the motor potentiometer or voltage setting. does not run. voltage input signal set to zero speed. 2. Check connections 2.
- Page 49 Troubleshooting Suggested Problem Possible Solutions Causes Motor runs too slow or 1. Calibrate MIN SPD 1. MIN SPD and MAX too fast. and MAX SPD (page SPD not calibrated. 28). 2. Check motor field 2. Field not operating connections and properly.
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Page 50: Figure 23. Mm21051C, Mm21151C, And Mm21251C Block Diagram
Figure 23. MM21051C, MM21151C, and MM21251C block diagram... -
Page 51: Figure 24. Mm21151C Switching Circuit Connections
Figure 24. MM21151C switching circuit connections... -
Page 52: Figure 25. Mm21251C Switching Circuit Connections
Block Diagrams Figure 25. MM21251C switching circuit connections... -
Page 53: Block Diagrams
Block Diagrams Replacement Parts Replacement parts are available form Minarik Corporation and its distributors for this drive series. Table 4. Replacement Parts Model No. Symbol Description Minarik P/N MM21051C C507 470mF, 400VDC filter cap 011-0120 D501-503 800 V, 20 A power diode... - Page 54 Notes...
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Page 55: Unconditional Warranty
Unconditional Warranty A. Warranty - Minarik Corporation (referred to as “the Corporation”) warrants that its products will be free from defects in workmanship and material for twelve (12) months or 3,000 hours, whichever comes first, from date of manufacture thereof. Within this... - Page 56 901 E Thompson Avenue Glendale, CA 91201-2011 Tel.: 1-800-MINARIK (646-2745) Fax: 1-800-394-6334 www.minarikcorp.com Document number 250–0100, Revision 5 Printed in the U.S.A – 7/01 North America $10.00, Outside North America $13.00...
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