EM-356-SBL is a high-power brushless DC motor driver with Hall sensor feedback. It includes an efficient MOSFET power stage, true 4-quadrant operation and regenerative braking capability. The unit supports 120° commutation and meets modern EMC requirements, making it suitable for industrial and OEM applications.
The EM-356-SBL uses the motor’s Hall sensor pulses not only for commutation, but also for position feedback in a servo-like manner. The positioning resolution depends on the number of motor pole pairs: a 1 pole-pair motor generates 6 positions per revolution, while a 7 pole-pair motor gives 42 positions per revolution. With a gearbox, the mechanical resolution improves further.
The internal positioning amplifier allows detailed adjustment of dynamics, braking behaviour, start/stop ramps and accuracy. The driver also includes a 31-bit position counter, enabling extremely large movement ranges and precise absolute positioning.
EM-356-SBL provides all the necessary interfaces for modern automation:
The device can operate as a locally controlled actuator or as a fully remote, bus-controlled positioning system in a Modbus network. Input and output behaviours are parameter-configurable, offering excellent flexibility.
Built-in protection features include overvoltage, undervoltage and overtemperature shutdowns. Faults are indicated with an onboard LED and can be monitored over Modbus. Current limiting and I-trip functions safeguard the motor and electronics against overloads. Faults can be reset via the reset input, a reset timer or by driving the analog reference to zero.
The 4-quadrant power stage supports regenerative braking. When braking energy feeds back to the supply, the rising voltage can be dissipated via a braking resistor output, or in battery systems, the energy can be returned to the battery.
Parameters can be configured with the EM-236 interface unit or Emen-Tool Lite software using the EM-328 adapter. All parameters are stored in non-volatile memory. Motor current, speed and diagnostics can also be monitored through the same interface or via Modbus.
The unit is DIN-rail mountable, with additional enclosure options for OEM use.
| TECHNICAL DATA – EM-356-SBL | |
|---|---|
| Supply Voltage | 12–48 V (11–56 Vdc) |
| Overvoltage Shut Down | 60 V |
| Idle Current | Typ. 30 mA |
| Max. Continuous Current | 15 A @ 40 °C 20 A with fan @ 40 °C |
| Max. Peak Current | 40 A (max. 2 s) |
| Max. Brake Output Current | 10 A (pin 21) |
| PWM Frequency | Typ. 16 kHz |
| Overtemperature Shut Down | 90 °C |
| Current Limit Setting | 1–40 A (step 1 A) |
| Current Limit Analog Scale | 0–5 V = 0–40 A |
| Digital Input Logic Level | “Off” = 0–1 V or open / “On” = 4–30 V |
| Digital Input Impedance | 10 kΩ |
| Digital Input Response Time | 2 ms |
| Analog Input Range | 0–5 V up to 0–10 V |
| Analog Input Resolution | 10-bit (1024 steps) |
| Analog Input Impedance | 100 kΩ |
| Analog Input Filter | 100 Hz |
| Position Counter Resolution | 31-bit (2,147 million steps) |
| Hall Input Max. Frequency | 800 Hz |
| Fault Output | PNP, max. 20 mA (5 V or 12 V) |
| Fan Output | NPN, max. 70 mA (12 V) |
| EMC Compliance | Measured for industrial environment |
| PCB Flammability Class | UL94V-0 |
| Dimensions | 89 × 73 × 32 mm (height 44 mm with fan) |
| Weight | 150 g (200 g with fan) |
