Network Cable
The PROFIBUS cable can be used as a network cable.
There are four types (A, B, C, and D) of PROFIBUS cables. Normally, cable type A is used for PROFIBUS DP network. The cable type A specifications are shown in the table below.
| Item | Specification |
|---|---|
| Impedance | 135 to 165 Ω |
| Capacity | < 30 pf/m |
| Loop resistance | 110 Ω/km |
| Wire diameter | 0.64 mm |
| Core cross-section | > 0.34 mm2 |
It is recommended to use a 9-pin D-Sub connector for protecting rating IP 20. For IP 65/67, M12 connector (IEC 947-5-2 compliant), Han-Bird connector (DESINA compliant), and Siemens hybrid connector are available.
Pin assignment (9-pin D-Sub)
| Pin No. | Signal | Assignment |
|---|---|---|
| 1 | Shield | Shield/Protective ground |
| 2 | M24 | Ground of output voltage (24 V) |
| 3 | RxD/TxD-P | Data line B |
| 4 | CNTR-P | Repeater control signal (directional control) |
| 5 | DGND | Communications power supply (5 V) |
| 6 | VP | Supply voltage to terminating resistor (P5V) |
| 7 | P24 | Output voltage (24 V) |
| 8 | RxD/TxD-N | Data line A |
| 9 | CNTR-N | Repeater control signal (directional control) |
Use pins 2 and 7 for connecting a maintenance device without any power supply.
The following figure illustrates wiring sample.
PROFIBUS cables are produced by a variety of manufacturers.
For details of the PROFIBUS cables, see PROFIBUS International’s website:
- Japan branch http://www.profibus.jp/ (opens new window)
- Headquarters (USA) http://www.profibus.com/ (opens new window)