Wiring & Pinout Guide
Ewing Aerospace
This document describes the connector pinout and wiring for the Ewing 55A 4-in-1 ESC based on the top and bottom views shown in the reference diagram. Wire colors shown in diagrams are for reference only and may not match your harness.
🔌 ESC ↔ Flight Controller Connector Pinout
Connector Signal Definitions
| Pin Name | Description | Notes |
|---|---|---|
| VBAT | Battery voltage output | Direct VBAT from ESC |
| GND | Ground | Common ground |
| ADC_CURR | Current sensor output | Used by FC for current draw |
| TLM | ESC Telemetry | Enable telemetry on FC UART |
| ESC1 | Motor 1 signal | DSHOT / digital |
| ESC2 | Motor 2 signal | DSHOT / digital |
| ESC3 | Motor 3 signal | DSHOT / digital |
| ESC4 | Motor 4 signal | DSHOT / digital |
📌 Connector Pin Order — Top View
When viewing the ESC from the top side, with the ESC connector at the top:
| Connector Order (Left → Right) | Signal |
|---|---|
| 1 | VBAT |
| 2 | GND |
| 3 | ADC_CURR |
| 4 | TLM |
| 5 | ESC1 |
| 6 | ESC2 |
| 7 | ESC3 |
| 8 | ESC4 |
⚙️ Motor Output Pads
The Ewing 55A is a 4-in-1 ESC, providing three motor phase pads per motor.
Motor Pad Mapping (Top View Reference)
| Motor | Location |
|---|---|
| Motor 1 | Bottom Right |
| Motor 2 | Top Right |
| Motor 3 | Bottom Left |
| Motor 4 | Top Left |
Each motor consists of three phase pads. Phase order does not matter; motor direction can be reversed in software.
🔋 Battery Input Pads
| Pad | Function |
|---|---|
| + | Battery positive (VBAT) |
| − | Battery ground (GND) |
- Rated for 3–8S LiPo
- Use 12 AWG wire or larger
- Install the included low-ESR capacitor across these pads as close as possible to the ESC