The Standard bus interconnections are made with a 6-conductor cable containing two separately-shielded twisted pair transmission lines for signaling, two power conductors and an overall shield. The two twisted pairs are crossed in each cable assembly in order to create transmit-receive connection. The power conductors (8 to 40 v, 1.5 a max.) supply power to the physical layer in isolated devices.
|
4-pin connector |
6-pin connector |
Name |
Description |
|
|
1 |
Power |
Unregulated DC; 30 V no load |
|
|
2 |
Ground |
Ground return for power and inner cable shield |
|
1 |
3 |
TPB- |
Twisted-pair B, differential signals |
|
2 |
4 |
TBP+ |
Twisted-pair B, differential signals |
|
3 |
5 |
TPA- |
Twisted-pair A, differential signals |
|
4 |
6 |
TPA+ |
Twisted-pair A, differential signals |
|
Shell |
Shell |
Outer |
Cable shield |
