EM-324
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- small size - high current output - current limit - zero current limit - overvoltage brake - speed setting - flexible control inputs - impulse / continuous mode - rail base mountable - 2KHz or 16kHz pwm frequency - for motor 5-50W - digital parameter setting EM-324 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 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. 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. 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. The parameters are set with EM-236 interface unit. Operation of the controller and some of its functional values can also be monitored with EM-236 interface unit. TECHNICAL DATA ( prog ver. 324 v1.0 ) 5V/ 10mA Supply voltage cont. max. 10-35V Overvoltage limit adjustable 15-40V ( connect motor to free ) Overvoltage dynamic brake 40V ( shorting motor poles ) Start up voltage 9V, shutdown voltage 8V Motor current cont. max. 3A, peak 7A ( @ 16kHz Ta >50°C ) Motor current cont. max. 4A, peak 7A ( @ 2kHz Ta >50°C ) Current limit adjustable 0.1-5A ( at start max 7A ) Overheat limit 100°C Start and stop ramp adjustable 0-5s PWM frequency 2 or 16kHz Speed input scale ( speed-2 ) 0-5V = 0-100% pwm 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 ) Connectors 1mm screw or Molex 2.5mm pitch Dimensions 32x72x18mm Dimensions in DIN-rail base 35x80x38mm CE-tested for industrial environment ( emc ) Operating temp ( Ta ) -40...60°C Weight 25g OVER VOLTAGE DRIVE LOGIC MOTOR CURRENT 47k parameter setting connector

ADJUSTMENT AND SETTINGS ( prog ver. EM-324 v1.0 ) Supply voltage must be filtered DC of 10-35V, and ripple should be less than 30% at full load. CAUTION ! Wrong polarity can damage the unit. CAUTION ! Unit doesn't have an internal fuse, so an external fuse should be added if fuse required. Adjusting and parameter setting of eg. current limit value, ramp times and speed-2 value is done with the EM-236 interface unit. With EM-236 the parameters and adjusted values can also be copied to multible devices accurately and reliably. MONITORABLE VALUES SETTABLE PARAMETERS 20pcs. ( defaults in...