The XLR connectors are used mostly in professional audio and video electronics cabling applications. Home audio and video electronics normally use RCA connectors. There is no common pinout - it's depends on application.
Balanced Audio (3 pole XLR):
| Pin | Signal | Description |
|---|---|---|
| 1 | Ground / Screen / Earth | |
| 2 | In phase / +ve / Hot | |
| 3 | Out of phase / -ve / Cold |
Unbalanced Audio (3 pole XLR):
| Pin | Signal | Description |
|---|---|---|
| 1 | Ground / Screen | |
| 2 | Signal | |
| 3 | Ground / Screen (connect to pin 1) |
| Application | Pin 1 | Pin 2 | Pin 3 | Notes |
|---|---|---|---|---|
| D54 | Screen |
No connection |
Signal (analogue multiplex) |
Strand analog multiplex - 384 channels Sometimes uses an XLR4 connector for compatibility with AMX192 |
| DMX512 (DMX) | Screen | Data - | Data + |
Digital multiplex - 512 channels Standard connector is the XLR5 |
|
TecPro Backbone |
Earth/ Screen |
Power +24VDC |
Audio | |
|
Audio Signal (European) |
Screen |
Signal + (Hot) |
Signal - (Cold) |
|
|
Jem TechnoHaze |
Black | Yellow | White | Remote from above (cable rear) |
| Canford Talkback backbone | earth/screen | +24V DC | audio | |
| High End Systems intelligent fixtures control | ground | data - | data + | |
| 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 |
| Microphones (Europe standard) | screen | signal + | signal - | |
| Microplex | common | +15 VDC | data | |
| AKG K702 headphones | ground | right | left | it is mini XLR connector |
correct
incorrect