The PROFIBUS standard defines two variations of the bus CABLE. However it is RECOMMENDED to use cable Type A in all new installations.

Type A is recommended for high transmission speeds and permits a doubling of the network distance in comparison to Type B.

Type A Technical specification:

• Impedance: 35 up to 165 Ohm at frequencies from 3 to 20 MHZ.
• Cable capacity: < 30 pF PER meter.
• Core diameter: > 0,34 mm², corresponds to AWG 22.
• Cable type: twisted pair cable. 1×2 or 2×2 or 1×4 lines.
• Resistance: < 110 Ohm per km.
• Signal attenuation: MAX. 9 dB over total length of line section.
• Shielding: CU shielding braid or shielding braid and shielding foil.
• Max. Bus length: 200 m at 1500 kbit/s, up to 1,2 km at 93,75 kbit/s. Extendable by repeaters.

The PROFIBUS standard defines two variations of the bus cable. However it is recommended to use cable Type A in all new installations.

Type A is recommended for high transmission speeds and permits a doubling of the network distance in comparison to Type B.

Type A Technical specification: