EM-296C is a four-quadrant speed controller for brushed DC motors. It uses pulse-width modulation to provide efficient forward and reverse motor control with controlled acceleration, deceleration and regenerative braking.
Motor voltage is regulated against variations in the supply voltage. Adjustable RxI load compensation improves speed stability when the motor load changes, particularly at low speeds. The adjustable current limit can restrict motor torque or stop the motor during an overload condition.
The full-bridge power stage supports forward and reverse motoring as well as controlled braking in both directions. This provides smooth direction changes and enables regenerated braking energy to be managed by the drive system.
The EM-296C regulates motor voltage against supply-voltage variations, helping the motor maintain the requested speed when the input voltage changes.
Adjustable RxI load compensation increases the motor drive as the mechanical load rises. This improves speed regulation, especially at low motor speeds.
The adjustable current limit restricts motor current and torque. Depending on the selected settings, it can regulate the output during loading or stop the motor when an overload condition occurs.
Independently adjustable start and stop ramps provide smooth acceleration and deceleration. Both ramps can be adjusted between 0 and 2.5 seconds.
The driver supports selectable 2 kHz and 16 kHz PWM frequencies. The 2 kHz setting provides the highest continuous current capacity, while 16 kHz enables quieter motor operation with slightly reduced current capability.
Two configurable control inputs are available for functions such as end-limit stopping, external stop, braking and freewheel control. The inputs use positive PNP control logic.
The setpoint input supports an external Rin resistor. For example, a 250 Ω resistor can be installed for a 0–20 mA control signal.
Output 1 can be configured to control an external braking resistor or magnetic brake. The output is an NPN open-collector output with a maximum current of 3 A.
| 12 V system | Greater than 4.7 Ω |
| 24 V system | Greater than 10 Ω |
| 48 V system | Greater than 22 Ω |
The optional fan version improves cooling during continuous operation at high current or elevated ambient temperature. Fan connections are available through pins 10 and 11.
Pin 11 can also be configured as a 12 V PNP indication output for external status monitoring.
Parameters can be configured using the EM-236 Interface Unit, which connects to the red onboard connector.
PC-based configuration is available using the EM-328 interface and EmenTool Lite. Output 1 and the pin 11 indication function can be assigned through parameters.
| Feature | EM-295C | EM-296C |
|---|---|---|
| Motor direction | One direction | Two directions, four-quadrant operation |
| Regenerative braking | Yes | Yes |
| Recommended motor power | 200 W at 12 V 300 W at 24 V 400 W at 48 V |
200 W at 12 V 300 W at 24 V 400 W at 48 V |
| Continuous current at 2 kHz | 25 A | 25 A |
| Continuous current at 16 kHz | 20 A | 20 A |
| Peak motor current | 40 A for 10 s | 40 A for 10 s |
| Current limit | Adjustable | Adjustable |
| Start and stop ramps | 0–2.5 s, adjustable | 0–2.5 s, adjustable |
| Brake-resistor output | Output 1, max. 3 A | Output 1, max. 3 A |
| Magnetic-brake control | Yes | Yes |
| Auxiliary input functions | Limit, stop, brake or freewheel | Limit, stop, brake or freewheel |
| Fan option | No | Yes |
| Operating temperature | −40…+70 °C | −40…+70 °C |
| Weight | 80 g | 115 g without fan / 130 g with fan |
| Nominal supply voltage | 12–48 VDC |
| Supply voltage limits | 10–58 VDC |
| Adjustable overvoltage shutdown | max. 60 V |
| Continuous motor current at 2 kHz | 25 A (Ta < 50 °C) |
| Continuous motor current at 16 kHz | 20 A (Ta < 50 °C) |
| Peak motor current | 40 A for 10 s |
| Voltage drop at full current | typ. 0.7 V |
| PWM frequency | 2 kHz or 16 kHz |
| Adjustable start ramp | 0–2.5 s |
| Adjustable stop ramp | 0–2.5 s |
| Control input range | 0–5 V or 0–10 V, adjustable |
| Setpoint input impedance | 100 kΩ with external Rin resistor socket |
| Motor output range | 0–10 V to 0–55 V, adjustable |
| Output 1 | NPN open collector, max. 3 A |
| Indication output (pin 11) | PNP, 12 V / max. 10 mA |
| Fan output (pin 11) | 12 V / max. 50 mA |
| Control input 1 | PNP, Rin 100 kΩ |
| Control input 2 | PNP, Rin 10 kΩ |
| Digital input levels | Low = 0–1 V / High = 4–30 V |
| Power connectors | Max. 2.5 mm² cable |
| Control connectors | Max. 1 mm² cable |
| EMC | Measured for industrial environments |
| Operating temperature (Ta) | −40…+70 °C |
| Weight | 115 g without fan / 130 g with fan |
Ordering larger quantities +100pcs.
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