EM-356C is a compact brushless DC motor driver with Hall sensor feedback and an efficient MOSFET power stage. The driver is designed for motors using 120° Hall commutation.
A true 4-quadrant power stage enables regenerative braking. During braking, the supply voltage rises and can be controlled using a braking resistor. In battery-powered systems, the regenerated energy can be returned to the battery, eliminating the need for a braking resistor.
The EM-356C includes digital command inputs for direction, start/stop, disable, and speed-2 activation. Analog inputs are provided for speed and current-limit control.
A PNP indication output provides external fault signalling. Fault conditions are also indicated by an on-board LED. Several input and output functions can be modified using parameters.
The true 4-quadrant power stage allows controlled operation and braking in both directions. When the motor decelerates, mechanical energy is converted back into electrical energy.
A suitable braking resistor can be connected to limit the resulting rise in supply voltage. When the driver is powered from a rechargeable battery, the regenerated energy can be returned to the battery.
The EM-356C provides two selectable speed control modes:
Adjustable start and stop ramps operate in both speed control modes. The speed range, closed-loop RPM range, and ramp times can be configured using parameters.
The analog inputs can be used for both speed and current-limit control. The speed input range can be selected from 0–5 V up to 0–10 V.
The analog inputs include a 100 Hz filter, allowing PWM signals to be used for speed and current-limit control.
The motor current limit can be set from 1 to 40 A in 1 A steps. An external 0–5 V analog signal can also be used for current-limit control, with 0–5 V corresponding to 0–40 A.
The driver includes protection against overvoltage, undervoltage, and overtemperature. Overvoltage shutdown occurs at 60 V, and overtemperature shutdown occurs at 90°C.
The EM-356C can optionally be equipped with an RS-485 Modbus interface. It enables external control, parameter adjustment, and monitoring from a host system or PLC.
Parameters can be configured digitally using the EM-236 Interface Unit. PC-based configuration is available using EmenTool Lite together with the EM-328 adapter cable.
Parameter settings are stored in the driver’s non-volatile memory. The interface can also be used to monitor motor current and RPM.
A version with a cooling fan is available for applications requiring higher continuous current. The maximum continuous current increases from 15 A to 20 A when the fan-cooled version is used at an ambient temperature of 40°C.
The device can be installed on a DIN-rail mounting base. Optional enclosure versions are available for different installation environments.
| Supply voltage | 12–48 V nominal (11–56 VDC) |
| Overvoltage shutdown | 60 V |
| Idle current | Typ. 30 mA |
| Maximum continuous current | 15 A at Tamb = 40°C |
| Maximum continuous current with fan | 20 A at Tamb = 40°C |
| Maximum peak current | 40 A for max. 2 s |
| Maximum brake output current | 5 A |
| PWM frequency | Typ. 16 kHz |
| Overtemperature shutdown | 90°C |
| Current-limit setting | 1–40 A in 1 A steps |
| Current-limit analog scale | 0–5 V = 0–40 A |
| Digital input OFF level | 0–1 V or open |
| Digital input ON level | 4–30 V |
| Digital input impedance | 10 kΩ |
| Digital input response time | 2 ms |
| Speed input range | 0–5 V up to 0–10 V |
| Analog input impedance | 100 kΩ |
| Analog input filter | 100 Hz |
| Indication output | PNP 12 V, max. 30 mA |
| Fan output | NPN, max. 70 mA |
| EMC | 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) |
Ordering larger quantities +100pcs.
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