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EM-115

Product catalog summary

Overview: The EM-115 DC Motor Control Unit is designed for controlling large permanent magnet DC motors with a power range of 50-500W. It operates on a supply voltage of 12-36V and supports a load capacity of 25A RMS, with a momentary capacity of 50A for 5 seconds. The unit is compact, efficient, and suitable for rail mounting.

Features:

Four quadrant drive allowing for driving and braking in both directions.
High efficiency of over 92% due to PWM (Pulse Width Modulation) control.
Adjustable current limit and ramp settings for smooth operation.
Protection against voltage peaks, overload, and temporary shortcuts.
Regenerative braking that feeds energy back to the power supply.

Technical Specifications:

Supply Voltage: 12-36 Vdc
Idle Current: < 50mA
Recommended Fuse: 5-30A
Control Potentiometer: 1k..50k
Motor Voltage: 0-30V
Control Voltage Range: 0-5V to 0-10V
Operating Frequency: approx. 21kHz
Efficiency: >92%
Operating Temperature: -10..50 °C
Dimensions: 107x107x45 mm
Weight: approx. 270 g

Operating Instructions:

Ensure correct polarity before connecting.
Use a filtered 12-36VDC power supply with ripple <20%.
Maintain proper ventilation if motor current exceeds 20A.
Ambient temperature should not exceed 50°C.

Controls:

P1: Sets maximum speed level.
P2: Sets speed-2 in 2-step speed mode.
P3: Adjusts acceleration/braking ramp for smooth operation.
P4: Sets current limit, indicated by a red LED.
P5: Compensates for load affecting motor RPM.

Connection Terminals:

1: Supply voltage 12-36V
2: Motor out +
3: Motor out -
4: Supply voltage 0V ground
5: Control voltage approx. 10V 80mA
6: Reverse (master)
7: Forward
8: Speed-2 activation
9: Control input (U / pot.)
10: Signal 0V ground

Important Notes:

Use ATO fuses rated 5-30A based on application requirements.
Continuous RPM control can be set with a potentiometer or external voltage signal.
Switching between forward and reverse is controlled by TTL, CMOS, or 0-24V signals.

Catalog excerpts

EM-115 DC-MOTOR CONTROL UNIT 12-36V 25A 4-QUAD. FEATURES: • Small size • Four quadrant drive • High efficiency >92% • Motor range 50-500W • Rail mounting base fittable • Adjustable current limit • Adjustable ramp EM-115 motor control unit is designed for big permanent magnet DC-motors. The power control is done with PWM method (Pulse Width Modulation). This facilitates high efficiency and small temperature losses. Thanks to a high switching frequency the unit operates quietly. A battery or a filtered DC-supply will do as a power source. The maximum output given by the unit depends on the installation. When operating at maximum power output sufficient air ventilation has to be taken care of. The unit operates in 4-quadrants so it drives and brakes in both directions. The braking is done with regenerative way feeding braking energy back to power supply. When a battery is not used as a power source the braking energy will be fed to the internal resistance of the motor. The motor rpm can be set either with potentiometer, trim or external voltage signal. The output acceleration ramp and current limit are set with trims, the current limit is indicated with a red LED. A load affecting the motor rpm can be eliminated with a compensation trim. The power stage is protected against voltage peaks, overload and temporary shortcuts. Even the incorrect polarity does not damage the unit as long as a fuse of recommended value is used. TECHNICAL DATA: Supply voltage Idle current Recommended fuse Control potentiometer Load capacity Motor voltage Control voltage range Voltage loss /V Current limit Operating frequency Ramp time On / Off control Input impedance Efficiency Operating temp. Dimensions Weight pole change

Open the catalog to page 1

EM-115 OPERATING AND CONNECTING INSTRUCTIONS SUPPLY 12-36V DC Check polarity before connecting! Use filtered 12-36VDC (ripple <20%) as operating voltage. When motor current constantly exceeds 20A, proper air ventilation must be taken care of. Ambient temperature should not be over 50°C. P5 comp. P1-maximum level. Use to set maximum level. This is also the speed set for speed-1 in 2-step speed mode. P2-speed-2 When using 2-step speed mode use P2 to set speed-2. P3-acceleration / braking ramp Use ramp adj. to obtain smooth starting and running. The right value can be found just by testing the set....

Open the catalog to page 2

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