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MCU (9W D plug)
It is highly recommended that the UCC BI is connected to the MCU using the cable provided with the MCU kit.
Connector details
The following is provided for information only:
This is a 9-pin 'D' plug suitable for connection to the MCU5, MCU5-2, MCU W, MCU W-2 or MCUlite-2 joystick.

| Pin no. | Function | Description |
|---|---|---|
| 1 | 0 V | Ground |
| 2 | RX - | RS422 recieve |
| 3 | RX + | RS422 recieve |
| 4 | TX + | RS422 transmit |
| 5 | Reserved | Reserved |
| 6 | +15 V | MCU supply |
| 7 | TX - | RS422 transmit |
| 8 | E-STOP_B | E-STOP chain |
| 9 | E-STOP_A | E-STOP chain |
| Shell | Screen | Screen |