EM-241C is a full bridge DC-motor starter. 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 shutdown 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 FAULTline is pulled down externally it will cause a stop and prevent thenew 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 command 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 DATA (prog ver. 241Cv1.7) | |
|---|---|
| Supply voltage (cont.) | max. 10-35V |
| Overvoltage limit | adjustable 15-40V |
| Start-up voltage | 9V |
| Shutdown voltage | 8V |
| Continuous current output (< 50°C) | 15A at 100% speed / 10A at 5-99% speed (PWM 2kHz) 10A at 100% speed / 5A at 5-99% speed (PWM 16kHz) |
| Peak current (5s) | 30A at 2kHz PWM 25A at 16kHz PWM |
| Current limit adjustable | 0.1-25A (max. 30A at start) |
| Notice! | During start ramp, current limit is boosted by 50% |
| Overheat limit | 100°C |
| Start and stop ramp | adjustable 0-5s |
| PWM frequency | 2kHz / 16kHz |
| Speed input range (pin 12) | 0-5V / 0-10V = 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. 47kΩ |
| Limit FW / BW input impedance | typ. 10kΩ |
| Control input response time | typ. 5ms |
| Fault output | NPN open collector, max 30V / 50mA |
| Fault input active | Uin < 1V (NPN) |
| Motor and supply connectors | 2.5mm |
| Control connectors | 1mm |
| Molex connector option | KK 508 / KK 6410 (see page 2) |
| Dimensions | 42 × 72 × 25mm |
| Dimensions (DIN-rail base) | 45 × 80 × 45mm |
| CE certification | Tested for industrial environment (EMC) |
| Operating temperature (Ta) | -40...60°C |
| Weight | 75g |
