EM-174A Electromen

EM-174A DC-MOTOR DRIVER 12/24Vdc 8A FEATURES: Bidirectional No brake Controlled direction change 10 V or 0...10 V control Soft start ramp Adjustable current limit Load compensation High efficiency High peak loading Rail base fittable EM-174A motor driver is designed for DC-motor speed control. The unit regulates motor voltage so non regulated supply voltage is well suited. A load affecting the motor rpm can be compensated with an adjustble load compensation ( RxI ). Potentiometer or direct voltage signal can be used to give the speed control value. Rotation direction changes when control value turns negative or if control signal is applied to direction input. The unit has reference positive and negative signal for potentiometer use, in other words potentiometer can also be used to drive both directions, motor stops at potentiometer middle position. Set value range can be scaled with range trim. At direction change the controller waits for motor to stop before driving in opposite direction. This avoids current peaks at direction change. The current limit can be set with a trim or direct voltage signal to protect the motor and mechanics in jam situations. Startup speed can be limited with so called ramp, which slowly rises the motor voltage in a desired way. Ramp time is set with a trim. EM-174A can be optimised for 12 or 24 V supply use. TECHNICAL DATA EM-174A BLOCK DIAGRAM Supply 12-32 Vdc Over voltage protection 40 V 5V/ 10mA + VOLTAGE 10 REG 4 Idle current app. 30 mA -5V/ 10mA SUPPLY 9 - Driving current 8 A continuous (Ta<50C) 1 12 A peak (50 / 50 %) SPEED CONTROL Motor voltage 0-15 (12 V setting) Um 7 0-29 (24 V setting) 3 RANGE Current limit adj. 0-12 A SCALE Cur. lim. volt. control 0-5 V (0-12 A) POWER RxI MOTOR STAGE Ramp time adj. 0-3 s Voltage loss 1 V (Im=8 A) 2 RAMP Operating frequency 25 kHz CURRENT AND Aux. voltages -5 V and +5 V (10 mA) DIRECTION VOLTAGE CONTROL 8 Control pot. 1-50 kohm CURRENT SET Control volt. range 5 V or 10 V 6 0-5 V or 0-10 V MOTOR CURRENT LIMIT Im Direction change backwards Uin = 4-30 V CURRENT MEAS. 5 forward Uin = 0-1 V or open impedance 10 kohm Operating temp (Ta) -20...+70C Dimensions (65x73x30) mm Weight approx. 80 gEM-174A OPERATING INSTRUCTIONS 65mm Supply should be filtered 12-32Vdc, max. ripple <30% on full load. 59mm ATT. Wrong supply polarity can damage the driver. ramp / s current limit / A ATT. Driver has no internal fuse. MOTOR 1 2 4 8 VOLTAGE 24V 12V 0 3 0 12 SETTINGS AND ADJUSTMENTS Set all trims to center position. Choose motor voltage range: with <15 voltages choose 12 V and with greater voltages choose 24 V range. Speed set value can be given with potentiometer or using a direct voltage signal 0-5 V ... 0-10 V. Acceleration and deceleration ramp is set with trim. In 0-3 s time unit drives from zero to full speed or LOAD COMPENSATION from full speed to zero. Compensation adjustment: set motor on to a low 10V MAX MIN rpm, add compensation until motor starts twiching SET VALUE and then reduce compensation until twitching ends. 5V After this motor loading can be tested for steady motor run. Current limit can be set to 0-12 A, current limit can 1 2 3 4 5 6 7 8 9 10 also be set using direct 0-5 V voltage signal or potentiometer. If the external control is used, turn the inbuilt current limit trim to 0-position. - + DC- BACKWARDS MOTOR 0V +12-32V SUPPLY FORWARD CAUTION EXAMPLE 1 (BESIDE) WRONG POLARITY CAN 0 - 12A DAMAGE THE DEVICE. SPEED, DIRECTION AND CURRENT CHOOSE FUSE ACCORDING ARE SET WITH POTENTIOMETERS. TO USE (1-16 A) EXAMPLE 2 EXAMPLE 3 5 6 7 8 9 10 5 6 7 8 9 10 SPEED CONTROL WITH CONTROLS WITH VOLTAGES POTENTIOMETER. ALL VOLTAGES WITH RESPECT DIRECTION CHANGE TO GND (0 V) WITH SWITCH. CURRENT 0-5 V (0-12 A) SPEED 0-5 V OR 0-10 V 5 V OR 10 V DIRECTION 4-30 V = BACKWARDS NOTICE IF CURRENT CONTROL IS USED, TURN CURRENT LIMIT TRIM TO MIN POSITION. ELECTROMEN Oy Vhheikkilntie 56B, 20810 Turku, FINLAND Tel. +358-2-4693050 Fax. +358-2-4693052 GND 0V CURRENT SET SPEED SET DIRECTION -5V +5V GND 0V CURRENT LIM. SPEED SET DIRECTION -5V +5V GND 0V CURRENT SET 66mm SPEED SET DIRECTION 72mm -5V +5V