> For the complete documentation index, see [llms.txt](https://arcsky.gitbook.io/x55-public-knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://arcsky.gitbook.io/x55-public-knowledge-base/appendix/electrical-interfaces.md).

# Electrical Interfaces

## Accessory Power Port

#### Model After October 2024

**Panel mount (on X55):**

XT60E-F

**Mating Connector:**

XT60 Male Connector

**Max current:** 3A total

| Pin | Signal      |
| --- | ----------- |
| (+) | ACC PWR 48V |
| (-) | ACC PWR GND |

{% hint style="warning" %}
Do not connect/ disconnect the accessory power connection when the X55 is powered on.
{% endhint %}

#### Model Before October 2024

**Panel mount (on X55):**

PT02A-8-4S

**Mating Connector:**

PT06A-8-4P (SR)

**Max current:** 3A total

**Gasket:**

10-101949-008

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FVXgJTEud9gN08000cZY0%2F0.png?alt=media)

| **Pin**                   | **Signal**  |
| ------------------------- | ----------- |
| A\&B (connected together) | ACC PWR 48V |
| C\&D (connected together) | ACC PWR GND |

## AUX Communication Port

## Model Before July 2023

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FShyFqTajBVZnUa376BT3%2F1.png?alt=media)

### Serial

The Cube part of the harness can be plugged into either a TELEM port or the GPS2 port, depending on the needs of the application.

TELEM2 mapping in Arducopter: SERIAL 2

GPS2 mapping in Arducopter: SERIAL 4

<table data-header-hidden><thead><tr><th width="129"></th><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>Pin</strong></td><td><strong>Signal</strong></td><td><strong>Source (option 1 - GPS2)</strong></td><td><strong>Source (option 2 - Telem)</strong></td></tr><tr><td>1</td><td>5V</td><td>Cube GPS2 pin 1 (VCC_5V)</td><td>Cube TELEM pin 1 (VCC_5V)</td></tr><tr><td>2</td><td>UART TX (OUT)</td><td>Cube GPS2 pin 2 (MCU_TX)</td><td>Cube TELEM pin 2 (MCU_TX)</td></tr><tr><td>3</td><td>UART RX (IN)</td><td>Cube GPS2 pin 3 (MCU_RX)</td><td>Cube TELEM pin 3 (MCU_RX)</td></tr><tr><td>4</td><td>CTS or SCL</td><td>Cube GPS2 pin 4 (SCL)</td><td>Cube TELEM pin 4 (MCU_CTS (TX))</td></tr><tr><td>5</td><td>RTS or SDA</td><td>Cube GPS2 pin 5 (SDA)</td><td>Cube TELEM pin 5 (MCU_RTS (RX))</td></tr><tr><td>6</td><td>GND</td><td>Cube GPS2 pin 6 (GND)</td><td>Cube TELEM pin 6 (GND)</td></tr></tbody></table>

### I2C

| **Pin** | **Signal** | **Source**               |
| ------- | ---------- | ------------------------ |
| 1       | 5V         | Cube I2C pin 1 (VCC\_5V) |
| 2       | SCL        | Cube I2C pin 2 (SCL)     |
| 3       | SDA        | Cube I2C pin 3 (SDA)     |
| 4       | GND        | Cube I2C pin 4 (GND)     |

### CAN1

| **Pin** | **Signal** | **Source**                |
| ------- | ---------- | ------------------------- |
| 1       | 5V         | Cube CAN1 pin 1 (VCC\_5V) |
| 2       | CAN\_H     | Cube CAN1 pin 2 (CAN\_H)  |
| 3       | CAN\_L     | Cube CAN1 pin 3 (CAN\_L)  |
| 4       | GND        | Cube CAN1 pin 4 (GND)     |

### CAN2

| **Pin** | **Signal** | **Source**                |
| ------- | ---------- | ------------------------- |
| 1       | 5V         | Cube CAN2 pin 1 (VCC\_5V) |
| 2       | CAN\_H     | Cube CAN2 pin 2 (CAN\_H)  |
| 3       | CAN\_L     | Cube CAN2 pin 3 (CAN\_L)  |
| 4       | GND        | Cube CAN2 pin 4 (GND)     |

### SERVO 1 (Top)

SERVO1 mapping in Arducopter: SERVO10

| **Pin** | **Signal** | **Source**                                     |
| ------- | ---------- | ---------------------------------------------- |
| 1       | GND        | Cube AUX OUT 2 GND                             |
| 2       | VCC        | Cube AUX OUT 2 PWR (rail normally not powered) |
| 3       | PWM        | Cube AUX OUT 2 signal                          |

### SERVO 2 (Bottom)

SERVO1 mapping in Arducopter: SERVO11

| **Pin** | **Signal** | **Source**                                     |
| ------- | ---------- | ---------------------------------------------- |
| 1       | GND        | Cube AUX OUT 3 GND                             |
| 2       | VCC        | Cube AUX OUT 3 PWR (rail normally not powered) |
| 3       | PWM        | Cube AUX OUT 3 signal                          |

### Sbus Out

| **Pin** | **Signal** | **Source**                                 |
| ------- | ---------- | ------------------------------------------ |
| 1       | GND        | Cube SBUSo GND                             |
| 2       | VCC        | Cube SBUSo PWR (rail normally not powered) |
| 3       | Signal     | Cube SBUSo signal                          |

## Model After July 2023

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2F5gKjhN5QV972QGqctYz4%2F2.png?alt=media)

### Serial

The SERIAL connector is internally connected to SERIAL3

| **Pin** | **Signal**    |
| ------- | ------------- |
| 1       | 5V            |
| 2       | UART TX (OUT) |
| 3       | UART RX (IN)  |
| 4       | NONE          |
| 5       | NONE          |
| 6       | GND           |

### CAN

The CAN connector is internally connected to CAN1 (pins 77 and 79 on the Cube connector)

| **Pin** | **Signal** |
| ------- | ---------- |
| 1       | 5V         |
| 2       | CAN\_H     |
| 3       | CAN\_L     |
| 4       | GND        |

### SERVO S1

Mapping in Arducopter: SERVO10

| Pin | Signal |
| --- | ------ |
| 1   | GND    |
| 2   | VCC    |
| 3   | PWM    |

### SERVO S2

Mapping in Arducopter: SERVO11

| Pin | Signal |
| --- | ------ |
| 1   | GND    |
| 2   | VCC    |
| 3   | PWM    |

### Sbus.o

| **Pin** | **Signal**                    |
| ------- | ----------------------------- |
| 1       | GND                           |
| 2       | VCC                           |
| 3       | Sbus out signal from the Cube |

### Sbus-ext

| **Pin** | **Signal**                                                   |
| ------- | ------------------------------------------------------------ |
| 1       | GND                                                          |
| 2       | VCC                                                          |
| 3       | Sbus pass through signal (needs to be configured internally) |

#### Master Payload Connector

Only on X55 Units as of October 2024

**Panel mount (on X55):**

PT02A-14-19S(025)

**Mating Connector:**

PT06A-14-19P(SR)

<figure><img src="https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2Fh0NwRJvTJ6ZmrrQ5YIOT%2Fconn.JPG?alt=media&amp;token=0b3f6151-2bfe-499b-9b17-f0bf9c570eef" alt=""><figcaption></figcaption></figure>

| Pin | Signal                             |
| --- | ---------------------------------- |
| A   | 12V PWR (Fused at 3A)              |
| B   | GND-PWR (12V)                      |
| C   | Ethernet Rx-                       |
| D   | Ethernet Rx+                       |
| E   | Ethernet Tx-                       |
| F   | Ethernet Tx+                       |
| R   | Ethernet signal GND                |
| M   | 5V PWR (Fused at 3A)               |
| L   | GND-PWR (5V)                       |
| K   | GND-PWR (VBUS-48V)                 |
| J   | VBUS-48V PWR (Fused at 3A)         |
| H   | SBus (or Servo/PWM) - configurable |
| G   | GND-SBus                           |
| S   | UART GND                           |
| T   | UART RX (Aircraft Side) - SERIAL3  |
| U   | UART TX (Drone Side) - SERIAL3     |
| N   | CANH                               |
| P   | CANL                               |
| V   | GND-CAN                            |