EM-241-SAF is a positioning driver for brushed DC motors. Its solid-state power stage uses efficient MOSFET technology, providing a long service life compared with electromechanical relay-based control solutions.
Position control and feedback are based on analog signals. The position command can be provided as a voltage or current signal, while the feedback can be supplied as a voltage signal or by an external feedback potentiometer. The maximum positioning accuracy is 0.2%, making the driver suitable for a wide range of actuator-positioning applications.
The position command can be supplied as a 0–5.5 V, 0–11 V or 0–20 mA analog signal. Position feedback can be provided as a 0–5 V or 0–10 V voltage signal.
Potentiometer feedback is also supported. The driver provides 0 V and 5.5 V auxiliary outputs for supplying the feedback potentiometer.
The movement range can be restricted at both ends using software limit parameters. Motor speed and current limits can be configured separately for the forward and reverse directions.
Additional parameters include load compensation, positioning dead zone, acceleration and deceleration ramps, and a braking zone. These adjustments support smooth direction changes and accurate approach to the requested position.
The EM-241-SAF can alternatively be controlled and configured through serial communication using the Modbus protocol.
Parameters and operating status can be configured and monitored using the EM-236 Interface Unit. Parameter settings can also be copied easily from one driver to other driver units.
An on-board LED indicates fault conditions using blinking codes.
The configurable Combiport can be used to forward fault information to other driver cards. Alternatively, it can provide a position-reached indication or an analog voltage signal representing the current position.
The driver has a wide operating temperature range and has been EMC tested. Several enclosure options are available for the EM-241-SAF driver card.
| Supply voltage | 10–35 V |
| Shutdown voltage | 8 V |
| Power-up voltage | 9 V |
| Motor current, continuous at 2 kHz | 15 A (Ta < 50 °C) |
| Motor current, momentary at 2 kHz | 30 A (Ta < 50 °C) |
| Motor current, continuous at 16 kHz | 8 A (Ta < 50 °C) |
| Motor current, momentary at 16 kHz | 25 A (Ta < 50 °C) |
| Current limit | 0.1–20 A |
| Start-ramp current-limit boost | 50% |
| Overtemperature limit | 100 °C |
| Start and stop ramp | 0–5 s |
| PWM frequency | 2 kHz / 16 kHz |
| Analog feedback range | 0–5 V / 0–10 V |
| Position control input range | 0–5.5 V / 0–11 V / 0–20 mA |
| Current-signal input impedance | 250 Ω (resistor not included) |
| Position output signal range | 0.5–4.5 V / 0–5 V |
| Digital input levels | High = 4–30 V / Low = 0–1 V |
| Digital input impedance | typ. 47 kΩ |
| Limit-FW / Limit-BW input impedance | 10 kΩ |
| Combiport pin | 13 |
| Fault output | NPN open collector, max. 30 V / 50 mA |
| Fault input | Uin < 1 V (NPN) |
| Indication output impedance | 1 kΩ |
| Motor and supply connectors | Max. 2.5 mm² cable |
| Signal connectors | Max. 1 mm² cable |
| Operating temperature (Ta) | −40…+60 °C |
| Dimensions | 72 × 42 × 25 mm |
| Weight | 80 g |
| EMC | EN 55022B and EN 61000-4-3, -4, -5 and -6 passed |
Ordering larger quantities +100pcs.
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