EM-241C is a full-bridge DC motor driver designed for applications requiring bidirectional motor control, adjustable motion profiles and configurable protection functions. It provides smooth forward and reverse operation for brushed DC motors and actuators.
Adjustable acceleration and deceleration ramps provide smooth starts, stops and direction changes. The adjustable current limit protects the motor and mechanical system against excessive current and torque and can also be utilized as an electronic end-stop.
The FW and BW inputs start the motor in the forward and reverse directions. The STOP input stops the motor, while separate Limit-FW and Limit-BW inputs can be used for direction-specific end-limit switches.
Two adjustable speed settings are available. The SPEED-2 input activates the second preset speed or can be configured as a 0–5 V or 0–10 V analog speed-control input.
The STOP input can alternatively be configured as a 0–5 V analog current-limit input. In this mode, the input signal corresponds to a current-limit range of 0–20 A.
In continuous mode, the motor runs for as long as the corresponding direction command remains active. In impulse mode, a short command starts the motor and another command changes or stops the operating state.
The adjustable current limit protects the motor and mechanism during startup, overload or obstruction conditions. During the start ramp, the selected current limit is temporarily increased by 50%, subject to the driver’s maximum starting-current limit.
The start and stop ramps can be adjusted between 0 and 5 seconds.
The 2 kHz PWM setting provides the highest continuous and peak current capability. The 16 kHz setting enables quieter motor operation but reduces the available output current.
Configurable freewheel options release the motor from active drive and electrical braking, allowing the motor shaft to rotate freely.
The start-kick function provides additional starting effort in applications with high starting friction. Automatic reverse can change the motor direction according to the configured operating conditions.
The digital inputs are divided into control and limit groups. Each group can be configured independently for NPN or PNP control logic.
The FAULT terminal functions as both an input and an output. It is normally high and is pulled low if an overtemperature condition occurs or, depending on the selected parameters, after a current trip.
Pulling the FAULT line below 1 V externally stops the motor and prevents a new start while the signal remains active. Fault terminals from several compatible drivers can be connected together to provide synchronized stopping.
Parameters can be adjusted directly using the EM-236 Interface Unit. PC-based configuration is available with EmenTool Lite and the EM-268 interface.
Mobile configuration is available using the EmenTool application and the EM-326 interface.
| Program version | EM-241C v1.7 |
| Supply voltage | 10–35 VDC |
| Adjustable overvoltage limit | 15–40 V |
| Start-up voltage | 9 V |
| Shutdown voltage | 8 V |
| Continuous current at 2 kHz, 100% PWM | 15 A (Ta < 50 °C) |
| Continuous current at 2 kHz, 5–99% PWM | 10 A (Ta < 50 °C) |
| Continuous current at 16 kHz, 100% PWM | 10 A (Ta < 50 °C) |
| Continuous current at 16 kHz, 5–99% PWM | 5 A (Ta < 50 °C) |
| Peak current at 2 kHz | 30 A for 5 s |
| Peak current at 16 kHz | 25 A for 5 s |
| Adjustable current limit | 0.1–25 A (max. 30 A at startup) |
| Start-ramp current-limit boost | 50%, subject to a 30 A maximum |
| Overtemperature limit | 100 °C |
| Adjustable start and stop ramps | 0–5 s |
| PWM frequency | 2 kHz / 16 kHz |
| Speed input range (pin 12) | 0–5 V or 0–10 V = 0–100% PWM |
| Current-limit input range (STOP) | 0–5 V = 0–20 A |
| Digital input levels | High = 4–30 V / Low = 0–1 V |
| Control input impedance | typ. 47 kΩ |
| Limit-FW / Limit-BW input impedance | typ. 10 kΩ |
| Control input response time | typ. 5 ms |
| Fault output | NPN open collector, max. 30 V / 50 mA |
| Fault input activation | Uin < 1 V (NPN) |
| Motor and supply connectors | Max. 2.5 mm² cable |
| Control connectors | Max. 1 mm² cable |
| Molex connector options | KK 508 / KK 6410 |
| Dimensions | 42 × 72 × 25 mm |
| Dimensions with DIN-rail base | 45 × 80 × 45 mm |
| EMC | CE tested for industrial environments |
| Operating temperature (Ta) | −40…+60 °C |
| Weight | 75 g |
Ordering larger quantities +100pcs.
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