EM-348 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. Driver has two selectable pwm frequency 2 or 16kHz. Power stage has smoothed switching technique which is achieved very low RF emissions, so external filter will not needed.
Driver has also external brake output which can be used for control magnetic brake or braking resistor in regenerative braking.
This card has integrated Rs-485 bus, with this bus can be control and monitoring driver and also the parameter of driver can be set with bus. This interface has as a standard Modbus RTU protocol. This bus makes possible to connected several cards under one control unit. Card has also two multifuntion control inputs, which can be set for digital or analog mode, depends on used firmware. This card has available with several firmware version for different applications. There is two program version for basic drive and positioning control. This card with -SAF firmware have meant to use with devices where is available analog feedback signal.
The parameter setting and monitoring can be done with Modbus or EM-236 interface unit, EM-328 with EmenTool-Lite PC-program. The Program updates domen with EmenTool.
| TECHNICAL DATA (PCB v1, prog EM-348-SAF v1.9) | |
|---|---|
| Supply voltage (continuous, max.) | 10-35V |
| Overvoltage limit (adjustable) | 15-40V |
| Start-up voltage | 9V |
| Shutdown voltage | 8V |
| Continuous current output | 15A @ 100% speed / 10A @ 5-99% speed (PWM = 2kHz) |
| 10A @ 100% speed / 5A @ 5-99% speed (PWM = 16kHz) | |
| Peak current (5s) | 30A @ 2kHz PWM, 25A @ 16kHz PWM |
| Current limit (adjustable) | 0.1-25A (Max. 30A at start) |
| (6A version currents) | Typically 2.5 times smaller |
| Overheat limit | 100°C |
| Start/stop ramp (adjustable) | 0-5s |
| PWM frequency | 2kHz / 16kHz |
| Analog input SET (pin 12) | 0-5V or 0-10V (Rin 47kΩ) |
| Analog input FB (pin 2) | 0-5V or 0-10V (Rin 10kΩ) |
| Limits for SET and FB inputs | 0-5.5V or 0-11V |
| Input control logic | High = 4-30V, Low = 0-1V |
| Control input impedance | Typ. 47kΩ |
| Control input response time | Typ. 5ms |
| Fault output (PNP open collector) | Max. 22V / 50mA |
| Brake output (NPN open collector) | Max. 35V / 2A |
| Disable input (active) | Uin > 4V (PNP) |
| Bus communication | RS-485, two-wire half duplex, 9.6-19.2kb/s |
| Motor and supply connectors | 2.5mm² |
| Control connectors | 1mm² |
| Dimensions | 42 x 72 x 25mm (6A version: 18mm) |
| Dimensions (DIN-rail base) | 45 x 80 x 45mm |
| CE-tested for industrial environment (EMC) | Yes |
| Operating temperature (Ta) | -40...60°C |
| Weight | 75g (6A version: 48g) |
