EM-241C-48V is a full bridge DC-motor starter for nominal voltage 24, 36 or 48V. It is designed to work with DC-motor in applications where some special functions are needed. Starter has adjustable acceleration and deceleration ramps, which make possible the smooth starts and stops. Adjustable current limit protects motor against overcurrent and it can also be used as an end-stop. This device has also two settable speeds, which are usefull in positioning applications. Control inputs FW and BW start the forward and backward run. STOP is for the motor soft shut-down but there are also available individual limit inputs for FW and BW directions. SPEED-2 input activates preset speed-2, but it can also be used as input for analog speed control signal 0-5V. STOP input can be set to work as current limit setting. FAULT terminal has at the same time input and output function, the pin is normally high, but is pulled down in overheat and conditionally also in current trip situation. If FAULT-line is pulled down externally it will cause a stop and prevent the new start. For example, it is possible to link fault pins of several units together and achieve a synchronous stop. C-version includes wo new parameter: freewheel options for realease the rotor of motor. and pwm frequency select, but notice, that in silence 16kHz pwm frequency. the output current is smaller!
There are two selectable control modes, continuous and impulse. In continuous mode the motor runs as long as the control is active. In impulse mode a short comand starts the motor, and only a new impulse will change the status. There is also few special settings start-kick and auto reverse. The card has selectable input logics. Inputs are divided in two groups, control and limit -inputs. Groups can be individually set for NPN or PNP logic.
For parameters setting there is next options: EM-236 interface unit, EM-268 with EmenTool-Lite PC-program and EM-326 with EmenTool-App application for smartphone

Technical DataEM-241C-48V

Supply voltage range nom. 24-48V / max. 20-60V
Overvoltage limit adjustable 15-60V
Start up voltage 14V, shutdown voltage 12V
Continuous current output when ambient temp is 10A at 100% speed / 7A at 5-99% speed pwm=2kHz
7A at 100% speed / 4A at 5-99% speed pwm=16kHz
Peak ( 5s.) 25A at 2khz pwm and 20A at 16kHz pwm
Current limit adjustable 0.1-25A ( at start max 30A )
Overheat limit 100°C
Start and stop ramp adjustable 0-5s
PWM frequency 2kHz / 16kHz
Speed input scale ( speed-2 ) 0-5V = 0-100% pwm
I-limit input scale ( stop input ) 0-5V = 0-20A
Input control logic: high =4-30V, low=0-1V
Control input impedances typ. 47kohm
Limit FW / BW input imped. typ 10kohm
Control input response time typ 5ms.
Fault out. NPN open coll. max 30V / 50mA
Fault in actives Uin < 1V ( NPN )
Motor and supply connectors 2.5mm
Control connectors 1mm
Dimensions 42x72x25mm
Dimensions in DIN-rail base 45x80x45mm
CE-tested for industrial environment ( emc )
Operating temp ( Ta ) -40...60°C
Weight 75g

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