EM-282D is a full bridge DC-motor starter. It is designed to work with DC-motor (permanent magnet and brushed) in applications where a variety of special functions and settings are needed. Starter has an adjustable acceleration and deceleration ramps enabling the smooth starts and stops. Adjustable current limit protects motor against overcurrent. Current limitation for braking is also available (regeneration). EM-282 has two selectable and settable speeds. This feature can be useful eg. in positioning applications. The FW and BW -inputs control the forward and backward run. STOP input is to stop the motor but there are also available individual limit inputs for FW and BW direction end stops that will cause a motor shut-down.
SPEED-2 input activates the presettable speed-2, but it can also be set for use as an analog speed control input (0-5V signal). FAULT terminal operates same time as an input and output. Fault line is internally pulled high (100kohm to Vsupply), but will be pulled down in overheat or conditionally also in current trip situation. If FAULT-line is pulled down externally it will cause a stop and disable a new start. For example it is possible to link FAULT pins of several units together and achieve this way a syncronous stop.
Driving can be done with two selectable control modes, continuous and impulse. In continuous mode the motor runs as long as the command is on. In impulse mode a short command starts the motor, and only a new impulse will change the status. Inputs are divided in to two groups, command and limit -inputs. These groups can be individually set to work with NPN (connect to zero control) or PNP (positive voltage control) -logic.
The parameters are set digitally with a hand held EM-236 interface unit. With this unit the same settings (adjustments) can also be easily copied to an other or to multible devices. Operation of the controller and some of its functional values can also be monitored with EM-236 interface unit.
| TECHNICAL DATA (prog. EM-282D v2.1 / pcb -D ver.3 or later) | |
|---|---|
| Supply voltage (nom.) | 12-48Vdc (abs. limits 10-60V) |
| Shutdown voltage | 10V |
| Overvoltage limit adjustable | 15-60V |
| Idle current (typ.) | 20mA or 1mA (shutdown input connected to GND) |
| Motor current max. cont. | 100A (at 24Vdc and 25°C amb. temp) |
| 80A and 100A with fan installed (at 24Vdc and 60°C amb. temp) | |
| Motor currents are about 20% lower with 16kHz PWM frequency | |
| At 48V supply voltage, motor current is typically 15% less | |
| Braking load current (pin 16) | Max cont. 50A, peak 100A |
| Current limit adjustable | 1-200A |
| NOTICE! | Current limit is 20% boosted during start ramp. |
| Overtemp. limit | 100°C |
| Start and stop ramp | Adjustable 0-5s |
| PWM frequency | 2kHz / 16kHz |
| Speed input scale (speed-2) | 0-4.5V = 0-100% PWM |
| I-limit input scale | 0-5V = 0-200A |
| Input control logic | High = 4-30V, Low = 0-1V |
| Control input impedance | Typ. 10kΩ |
| Control input response time | Typ. 5ms |
| Fault output | NPN open collector, max 42V / 0.5A |
| Fault input active | Uin < 1V (NPN with 100k pull-up) |
| Fan output | Switches on at 55°C, off at 50°C |
| Fan output NPN | 12V, 100mA |
| RS-485 bus | Half duplex, Modbus RTU, 9.6/19.2 kbps |
| Brake output | NPN, max 50A |
| Motor and supply connectors | 16mm² |
| Control connectors | 1mm² |
| Dimensions | 180 x 122 x 45mm (height 52mm with fan) |
| CE certification | Tested for industrial environment (EMC) |
| Operating ambient temperature (Ta) | -40...60°C |
| Weight | 615g (640g with fan) |
