EM-243-SPF is a high-current 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 feedback is provided by one- or two-channel pulse signals. Although one-channel feedback can be used, two-channel 0°/90° pulse feedback is recommended for more reliable position monitoring and direction detection.
The analog position command supports 0–5.5 V, 0–11 V and 4–20 mA signal ranges. The input can be scaled within the selected range. The maximum electrical positioning accuracy of the driver and feedback system is 0.2%.
Position feedback can be obtained using either one pulse channel or two pulse channels with a 0°/90° phase difference.
The two-channel method is preferred because it provides more reliable position information and allows the controller to determine the direction of movement from the pulse sequence.
The position command can be supplied as a 0–5.5 V, 0–11 V or 4–20 mA analog signal. The selected input range can be scaled to match the required mechanical travel.
A 10 kΩ positioning potentiometer is recommended when a potentiometer is used to provide the position command. The maximum permitted potentiometer resistance is 22 kΩ.
The parameter set includes an automatic learn routine that helps determine the full mechanical movement range quickly and easily.
The usable movement range can then be restricted from both ends using software limit parameters. Accumulating pulse-count errors can be corrected using a manually or automatically triggered homing sequence.
Motor speed and current limits can be configured separately for the forward and reverse directions. Additional adjustment parameters include load compensation, positioning dead zone, acceleration and deceleration ramps, and a braking zone.
These settings allow the motion profile to be adapted to the mechanics of the application and support smooth direction changes, controlled braking and accurate final positioning.
The power stage can provide up to 40 A of continuous motor current and 60 A momentarily when operating at the lower PWM frequency.
At the higher PWM frequency, the corresponding current capacities are 25 A continuously and 40 A momentarily. The adjustable current limit ranges from 1 A to 100 A.
During the start ramp, the controller can provide additional current to overcome static friction and high mechanical breakaway loads.
The specified maximum start current is 150 A for one second.
The 2 kHz PWM setting provides the highest available continuous and momentary-current capacity.
The 16 kHz setting moves the switching frequency above the normal audible range and provides quieter motor operation with reduced current capacity.
Parameters and operating status can be configured and monitored using the EM-236A Interface Unit. Parameter settings can also be copied from one driver to other units.
An on-board LED indicates fault conditions using blinking codes.
Combiport can be configured as an NPN open-collector fault output, a position-reached output, an analog position signal output or an active-low disable input.
When configured as an analog position output, the available signal ranges are 0–5 V and 0.5–4.5 V. A 0 V signal indicates a fault condition.
The NPN fan-control output becomes active when the controller temperature reaches 50 °C. It can control a compatible external cooling fan within its 40 V and 1 A output rating.
A separate NPN brake output is available for controlling an external electromagnetic brake or another compatible braking circuit.
The brake output is rated for loads up to 60 V and 5 A.
The EM-243-SPF has a wide operating-temperature range and is EMC tested for household and industrial environments.
The same enclosure options available for the standard EM-243 driver card can also be used with the EM-243-SPF.
The EM-243-SPF is suitable for heavy linear actuators, industrial valves, large positioning mechanisms, hatches, lifting systems and other high-current applications requiring pulse-feedback positioning.
| Firmware version | v1.8 |
| Nominal supply voltage | 12–48 VDC |
| Operating supply-voltage range | 10–58 VDC |
| Shutdown voltage | 8 V |
| Power-up voltage | 9 V |
| Motor current at 2 kHz, continuous | 40 A |
| Motor current at 2 kHz, momentary | 60 A |
| Motor current at 16 kHz, continuous | 25 A |
| Motor current at 16 kHz, momentary | 40 A |
| Adjustable current limit | 1–100 A |
| Maximum start current | 150 A for max. 1 s |
| Overtemperature limit | 100 °C |
| Fan-output activation temperature | 50 °C |
| PWM frequency | 2 kHz / 16 kHz |
| Pulse sampling interval | 0.2 ms |
| Maximum pulse-input frequency | 700 Hz |
| Position control-input ranges | 0–5.5 V / 0–11 V / 4–20 mA |
| Positioning potentiometer | 10 kΩ recommended, 22 kΩ maximum |
| Current-signal input resistor | 250 Ω, socket provided on the board |
| Position output-signal range | 0–5 V or 0.5–4.5 V; 0 V indicates a fault |
| Digital input, high state | 4–30 V |
| Digital input, low state | 0–1 V |
| Digital input impedance | typ. 47 kΩ |
| Limit-FW, Limit-BW and pulse-input impedance | typ. 10 kΩ |
| Combiport fault output | NPN open collector, max. 30 V / 1 A |
| Combiport disable input | Active when Uin < 1 V (NPN) |
| Combiport indication-output impedance | 1 kΩ |
| Fan output | NPN, max. 40 V / 1 A |
| Brake output | NPN, max. 60 V / 5 A |
| Motor and supply connectors | Max. 2.5 mm² cable |
| Signal connectors | Max. 1 mm² cable |
| Operating temperature (Ta) | −40…+60 °C |
| Dimensions | 107 × 72 × 40 mm |
| Weight | 190 g |
| EMC | EN 55022B and EN 61000-4-3, -4, -5 and -6 passed |
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