EM-A46 is a compact signal converter that transforms a standard RC servo-type pulse signal into analogue speed and direction control signals. It allows compatible Electromen motor controllers to be operated from an RF remote-control receiver or an ArduPilot-compatible PWM output.
The module is designed for installation in Electromen motor controllers equipped with an EM-A1 option-card slot. Compatible driver examples include the EM-282D and EM-347B. Once installed and correctly configured, the motor can be controlled in both forward and reverse directions using a conventional radio-control transmitter.
The EM-A46 accepts a servo-type pulse input with a nominal pulse length of 1–2 ms. The incoming pulse length is converted into separate internal 0–5 V speed and direction signals for the host motor controller.
The centre position represents the neutral motor command. A ±25 µs deadband around the centre position prevents small pulse-length variations from unintentionally starting the motor.
The centre position can be adjusted to accommodate differences between transmitters, receivers and control systems. Direction switching includes 15 µs hysteresis to reduce unstable switching close to the neutral position.
If the input pulse signal is lost, the module sets the speed command to zero after a delay of approximately one second. This provides a basic response to interrupted communication between the transmitter, receiver and motor controller.
An optional three-pin input connector allows a standard RC receiver output to be connected directly to the module. The EM-A46 provides a limited auxiliary 4.2 V output for receiver-related use, but an external receiver power supply is recommended.
| Supply voltage (VCC) | 3–6 VDC |
|---|---|
| Current consumption | Typically 10 mA |
| Input signal type | RC servo-type pulse signal |
| Input signal voltage | 3–10 V |
| Input pulse length | 1–2 ms |
| Internal speed output | 0–5 V |
| Internal direction output | 0–5 V |
| Auxiliary supply for RF receiver | 4.2 V, maximum 30 mA |
| Receiver supply recommendation | External receiver power supply recommended |
| Neutral deadband | ±25 µs |
| Centre-position adjustment | ±10% |
| Direction output hysteresis | 15 µs |
| Signal-loss delay | 1 s before speed command is set to zero |
| Response time | Typically 20 ms |
| Option-card connector | 6 × 2.5 mm female pin |
| Optional receiver connector | Three-pin input connector |
| Dimensions | 19 × 19 mm |
| Weight | 10 g |
| Operating temperature (Ta) | −40 … +60 °C |
Ordering larger quantities +100pcs.
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