SMPTE 26-pin circular connector is used on studio cameras and camera control units (CCUs) for fiber-based camera chains, carrying video, audio, intercom, power, and tally over a single connection.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground | GND |
| 2 | VIDEO RTN | Video return to camera | BUS |
| 3 | AUDIO 1+ | Program audio 1 positive | ADC |
| 4 | AUDIO 1- | Program audio 1 negative | ADC |
| 5 | AUDIO 2+ | Program audio 2 positive | ADC |
| 6 | AUDIO 2- | Program audio 2 negative | ADC |
| 7 | INTERCOM+ | Intercom audio positive | ADC |
| 8 | INTERCOM- | Intercom audio negative | ADC |
| 9 | TALLY RED | Red tally indicator | I/O |
| 10 | TALLY GREEN | Green tally indicator | I/O |
| 11 | CTRL DATA | Camera control data | BUS |
| 12 | CTRL CLK | Camera control clock | BUS |
| 13 | PWR+ | Power positive to camera | PWR |
| 14 | PWR+ | Power positive | PWR |
| 15 | PWR RTN | Power return | GND |
SMPTE 26-pin circular connector is used on studio cameras and camera control units (CCUs) for fiber-based camera chains, carrying video, audio, intercom, power, and tally over a single connection.