EM-379 is a high-power brushless DC motor driver with hall sensor feedback and an efficient MOSFET power stage. The driver supports 120° commutation and includes a true 4-quadrant power stage, enabling regenerative braking.
During regenerative braking the supply voltage rises. This voltage rise can be controlled with a braking resistor, or in battery-powered systems the regenerated energy can be directed back into the battery, eliminating the need for a braking resistor.
Cooling is implemented through the aluminum base plate. In high-power applications an additional heatsink or mounting to a sufficient metal structure may be required.
The EM-379 includes digital command inputs such as:
Analog inputs are available for speed and current control. The driver can alternatively be controlled and monitored through RS-485 Modbus RTU.
Two NPN outputs are available for:
Several input and output functions can be configured with parameters.
The driver includes protection against:
Fault conditions are indicated with an on-board fault LED. Overtemperature and current limit events can be reset using:
Start and stop ramps operate in both modes. Speed range, closed-loop RPM range and ramp settings are parameter adjustable.
Filtered analog inputs also support PWM control signals for speed and current control.
The EM-379 supports additional control methods through optional auxiliary cards connected to the A1 socket:
Settings can be configured digitally using the EM-236A Interface Unit or with a PC running EmenTool Lite together with the EM-328 adapter cable.
Parameters are stored in non-volatile memory.
DIP switches are also available for selecting:
These special braking modes improve holding torque during stop conditions.
The special shutdown input forces the driver into low power consumption mode. This input overrides all other control commands and immediately disables motor operation.
The device also includes a dedicated cooling fan output. The fan is activated automatically when the temperature rises above 65°C.
| Supply voltage | 12–48 V (11–60 VDC) |
| Overvoltage limit | 15–65 V (adjustable) |
| Idle current | typ. 30 mA |
| Idle current (shutdown) | "open" or low < 0.5 mA |
| Max current (continuous) | 60 A (Tamb. 50 °C) |
| Max current (continuous with fan) | 70 A |
| Max current peak | 80 A (max. 5 s) |
| Notice | Continuous current > 20 A requires additional heatsink |
| Max brake output current | 20 A (pin 21) |
| Recommended brake resistor | 1.5–10 Ω |
| PWM frequency | typ. 16 kHz |
| Overtemperature shutdown | 90 °C |
| Fan output activation | > 65 °C |
| Current limit setting | 1–100 A (step 1 A) |
| Current limit analog scale | 0–5 V = 0–100 A |
| Digital input logic level | "off" = 0–1 V or open / "on" = 4–30 V |
| Logic input impedance | 10 kΩ |
| Shutdown input | open or < 1 V (= low idle) |
| Digital input response time | 2 ms |
| Analog input range | 0–5 V up to 0–10 V |
| Analog input impedance | 100 kΩ |
| Analog input filter | 100 Hz |
| RS-485 | 9600 / 19200 baud, Modbus RTU |
| Overcurrent output | NPN max. 2 A / 60 V |
| Fault output | NPN max. 50 V / 50 mA |
| Fan cooling output | 12 V max. 100 mA |
| EMC | Measured |
| PCB flammability class | UL94V-0 |
| Dimensions | 143 × 110 × 32 mm |
| Weight | 340 g / 360 g with fan |
