EM-12ADC motor controller

Product catalog summary

Introduction
The EM-12A PWM DC-Motor Control Unit is designed for industrial and automation applications, supporting a power range of 0 to 200W. It offers easy and economical control of DC motors with various adjustments and connection options, enhancing reliability with built-in protection features. The unit supports continuous control via a potentiometer, switch, or ±10 V signal.

Features

Continuous power regulation and controlled direction change.
Adjustable current limit, acceleration ramp, and maximum power limit.
Protection against load short circuits.
CB-mode for increased starting torque.
High efficiency and compact size.
Rail mounting base available.

Technical Data

Operating voltage: 18-30 Vdc.
Idle current: 50mA.
Load capacity: 8A (RMS), momentary 15A (5s).
Operating frequency: approx. 22 kHz.
Control potentiometer: 10k or 25k 0.25W linear.
Recommended fuses: max. 8A, slow.
Operating temperature: 0-50 °C.
Dimensions: 87x72x28 mm.

Adjustments

Acceleration ramp: 0.5 to 5 seconds.
Current limit: 0.5 to 20 A.
Max power limit: 0 to 100%.

Instructions and Connections
Connection options are illustrated in figures 2a to 2d. Adjustments include setting the max power limit, acceleration ramp, and current limit. The control unit can be configured for different control methods, including potentiometer and switch combinations. Caution is advised when using the unit with high inertia applications or where the load rotates the motor.

Control Limit
To restrict the maximum running speed, adjust the max power limit counter-clockwise. Ensure the acceleration ramp is not set too short to prevent reversing while the motor is still running.

Current Limit
The current limit protects the motor from overloading. Adjust it so the red LED does not light during normal conditions. Overloading the motor can test the current limit operation.

Figures and Diagrams
Figures 2a to 2d illustrate various control configurations, including potentiometer control, switch control, and voltage control. Figure 3 shows the adjustment settings for current limit, acceleration ramp, and max power limit.

Catalog excerpts

EM-12A PWM DC-MOTOR CONTROL UNIT 24V 8A 200W FEATURES: • Continuous power regulation and controlled direction change • Adjustable current limit, acceleration ramp and max. power limit • Load short circuit protected • CB-mode for increased starting torque • High efficiency, small size • Controllable with potentiometer, switch or voltage signal • Rail mounting base available EM-12A DC-motor control unit is designed for use in industry and automation applications in power range of 0...200 W. With EM-12A DC-motor can be controlled easily and economically. EM-12A includes many adjustments and various connection choices. Inbuilt protection features increase the reliability of use. CB-function (current boost) eliminates motor rushing if started with load. EM-12A can be controlled continuously with one potentiometer forward/stop/reverse or the control can be divided to switch and potentiometer or just for switch. EM-12A can be controlled with ±10 V signal as well. TECHNICAL DATA: 28mm 57mm 52mm Adjustments: Acceleration ramp (0...100%) 0.5 ... 5 s Current limit 0.5 ... 20 A Max. power limit 0 ... 100 % 87mm 77mm F2 72mm 62mm F1 P1 LED, CURRENT LIMIT P2 Operating voltage 18...30 Vdc Idle current 50mA Load capacity 8A (RMS) mom. 15A (5s) Operating frequency approx. 22 kHz Control pot.meter 10k or 25k 0.25W lin. Recommended fuses (F1,F2) max. 8A, slow Operating temp. 0...50 °C Dimensions 87*72*28 mm P3 1 2 3 4 FUSES (8A, SLOW) F1, SUPPLY F2, MOTOR 5 6 7 8 9 ADJUSTMENTS P1, CURRENT LIMIT P2, ACCELERATION RAMP P3, MAX. POWER LIMIT

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EM-12A INSTRUCTIONS CONNECTIONS Connection choices are displayed in figures 2a, 2b, 2c and 2d. If the operating direction of the connected potentiometer is not as desired, the outer wires should be switched. If the rotating direction of the motor is not as wanted, the motor wires should be switched. CAUTION. When the card is supplied from a transformer, capacitor should be added as shown in figures. With battery supply the capacitor is needed only if supply leads are extensive (over 5m). _______ INTRODUCTION Adjust the max. power limit to 100 % (P3 clockwise), acceleration ramp to 5 s position...

Open the catalog to page 2

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