EM-348-48V-PLI 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. In -PLI version there are also PULSE COUNTER which can be used for end limit use. This counter value keep in memory of card also when power is turned off. FAULT output terminal indicates different failure situations. This pin is normally low, but is pulled up in overheat and conditionally also in current trip situation. DISABLE input disables driver as long as this is pulled up externally. Also it is
possible to link fault and disable pins of several units together and achieve a syncronous stop. The BRAKE output can be used to release external magnetic brake or control brake resistor in overvoltage situation.
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.
This device is designed to control also with Rs-485 Bus.The control bus use Modbus RTU protocol and with the Bus there can be set, speed, direction, accelaration and deceleration ramps and current limit. Also the monitoring and parameter setting are possible with the Bus.
There is a separate instruction for operating the bus.
| TECHNICAL DATA | |
|---|---|
| Model | EM-348-48V-PLI prog -PLI v2.0 |
| Supply voltage continuous (max.) | 20-55V |
| Overvoltage limit adjustable | 15-65V (hardware limitations) |
| Startup voltage | 9V |
| Shutdown voltage | 8V |
| Continuous current output (when ambient temp.) | 10A at 100% speed / 7A at 5-99% speed (PWM=2kHz) |
| 7A at 100% speed / 4A 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) |
| (6A version currents are typically 2.5 times smaller) | |
| Overheat limit | 100°C |
| Start and stop ramp adjustable | 0-5s |
| PWM frequency | 2kHz / 16kHz |
| Input control logic | High = 4-30V, Low = 0-1V |
| Control input impedance | Typ. 47kΩ |
| Control input response time | Typ. 5ms |
| Pulse input impedance | Typ. 10kΩ |
| Pulse input frequency (max.) | 700Hz |
| Fault output | PNP open collector, 22V max. 20mA |
| Disable input active | Uin > 4V (PNP) |
| Brake output | NPN open collector, max. 55V / 1.5A |
| Minimum brake resistance | 24V 15Ω / 48V 33Ω |
| Bus (RS-485) | Two-wire half-duplex, 9600kb/s |
| Motor and supply connectors | 2.5mm² |
| Control connectors | 1mm² |
| Dimensions (mm) | 42x72x25 |
| Dimensions with DIN-rail base (mm) | 45x80x45 |
| CE-tested for industrial environment (EMC) | |
| Operating temperature (Ta) | -40...60°C |
| Weight | 75g |
