viewed from wiring side
| Application | 1 | 2 | 3 | Notes |
|---|---|---|---|---|
| Canford Talkback backbone | earth/screen | +24V DC | audio | |
| D54 | screen | no connection | analogue multiplex | |
| DMX | screen | data - | data + | this is not an official standard:
reversible polarity |
| High End Systems intelligent fixtures control | ground | data - | data + | |
| Loudspeakers | ||||
| Martin intelligent fixtures control (old) | screen | data + | data - | this is not the same as 3-pin DMX! |
| Martin intelligent fixtures control (new) | screen | data - | data + | Martin have now changed to be pin compatible with 3-pin DMX |
| Martin smoke machine control | ||||
| Microphones (Europe standard) | screen | signal + | signal - | |
| Microphones (US standard) | ||||
| Microplex | common | +15 VDC | data |