EM-347B BRUSHLESS with MODBUS( BLDC ) MOTOR DRIVER 12-48V 50A
EM-347B is a brushless DC-motor driver with hall sensor feedback. The unit has a mosfet power stage with good efficiency and it meets today's EMC requirements. The driver can be used with 120° commutation. This driver has true 4Q power stage, which makes it possible to use regenerative braking. In this braking method the supply voltage rises, but voltage rising can be controlled with a braking resistor. If using battery supply, then the braking energy can be lead back into the battery and a braking resistor will not be needed. The unit has basic digital command inputs like direction, brake, start/stop, disable and there are analog inputs for speed and current control. One digitally presetable second speed (speed-2) is possible to activate with digital command input. EM-347-48V has two NPN outputs for fault and overcurrent indication use. Some input and output functions can be modified with parameters. Driver includes overvoltage, undervoltage and overtemperature protection. These fault situations are indicated with fault on-board LED. Overtemperature and current limit situations can be reset with reset input, reset-timer or by setting analog speed control to value to 0.
There are two control options for speed. Direct control ( open loop ) sets motor voltage in propotion to control voltage as with a standard DC-motor. Closed loop uses hall sensor feedback for speed control. This mode offers good speed regulation. Start and stop ramps work in both modes. Speed adjust range, closed loop rpm range and ramps can be set with parameters. Anolog inputs are filtered so that they can also use PWM signal for controlling speed and current.
Settings can be done digitally with EM-236 interface unit or with Emen-Tool lite program installed in PC and EM-268 adapter cable. Parameters are stored into non-volatile memory of device. This interface unit can also monitor the current and rpm of motor. If necessary, the device also has an optional cooling fan available, which can be controlled with its designated output. This output switches on fan, when temperature rises over 65 deg.
This B-version has added shutdown control input to set driver to the low power consumption mode and also there is added Rs-485 port for Modbus communication. B-version has also few new stop braking option. In "stop brake" mode the all motor wire shorted in stop situation and it gives better hold torque as usually. The another special stop mode is "hold current" this generates very strong hold torque.
The device can be installed in DIN-rail base and some enclosure options are also available.
Supply voltage 12-48V ( 11-60Vdc )
Overvoltage limit 15-65V ( adjustable )
Idle current typ. 30mA
Idle current, shutdown connect to gnd 0.2mA
Max. current 50A cont ( Tamb. 50 °C )
Max. current 60A cont. with fan cooling
Max. current peak 80A ( max. 5s )
Max. brake output ( pin-21 ) current 20A
Brake resistor recom.value 1.5-10ohm
Pwm frequency typ. 16kHz
Overtemperature shut down 90°C
Fan output switch on > 65°C
Current limit setting 1-100A ( step 1 A )
Current limit analog scale 0-5V = 0-100A
Logic level of digital inputs
"off" = 0-1V or open / "on"= 4-30V
Input impedance of logic inputs 10k
Shutdown input open or gnd ( gnd= low idle )
Response time of digital input 2ms
Analog input range 0-5V up to 0-10V
Input impedance of analog inputs 100k
Input filter of analog input 100Hz
Rs-485 9600 / 19200baud Modbus RTU
Overcurrent output NPN max. 2A/60V
Fault output NPN max. 50V 50mA
Output for fan cooling 12V max. 100mA
EMC measured for industrial envinronment
PCB material flammability class UL94V-0
Dimensions 140x122x43mm ( 56mm with fan )
Weight 520g / with fan 550 g
- EN_em-347B.pdf - Download product file (4617 kb)
- EM-347B_Modbus_Data_Address_1v0.pdf - Download product file (134 kb)
- Test_Modbus_connection_with_Qmodbus.pdf - Download product file (209 kb)
- 19 pcs. in stock
156,00 € /unit