| Number | X-pin, color | Description |
|---|---|---|
| X2617 | 6-pin, Black | Connector Tone-sequence control unit |
| X2618 | 4-pin, Black | Connector Tone-sequence control unit |
| X2837 | 1-pin, Black | Connector Tone-sequence control unit |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Ground | Ground point |
| 2 | A | Signal, terminal 84 | Connector, terminal 84 |
| 3 | Not used | ||
| 4 | E | Signal, terminal 84 | Alarm switch |
| 5 | E | Signal, terminal 84 | Alarm switch |
| 6 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Terminal 30 voltage supply | Fuse, officials F01 |
| 2 | A | Signal, super-tone horns | Connector, super-tone horns |
| 3 | E | Signal, alarm switch | Alarm switch |
| 4 | A | Signal, super-tone horns | Connector, super-tone horns |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply terminal R | Fuse, officials F04 |