EM-A46 is a signal converter module that transforms a 1–2 ms pulse-length signal — typically used in RF remote control receivers or ArduPilot PWM systems — into corresponding analog control signals.
The card can be implemented in Electromen driver boards that include an option card slot (EM-A1), such as EM-282D and EM-347B. When installed, the direction input of the driver is converted to an ArduPilot PWM input, enabling full forward and reverse control using a standard radio remote controller.
The EM-A46 also includes an optional 3-pin input connector for direct connection to standard RF receiver outputs.
| Supply voltage (Vcc) | 3–6 VDC |
| Current consumption | typ. 10 mA |
| Input signal | “Futaba servo” type 3–10 V PWM, 1–2 ms |
| Output (internal) | 0–5 V speed / 0–5 V direction |
| Aux supply for RF receiver | 4.2 V max, 30 mA Note: RF receiver should be powered externally, not from this output |
| Speed output midpoint dead time | ±25 µs |
| Midpoint adjustment | ±10 % |
| Direction output hysteresis | 15 µs |
| No-signal delay | 1 s (speed to zero) |
| Response time | typ. 20 ms |
| Connectors | 6 × 2.5 mm female pin |
| Dimensions | 19 × 19 mm |
| Weight | 10 g |
| Operating temperature (Ta) | −40 … +60 °C |
