Interfaces

Cable lengths and type specification

Signal inputs and outputs (I/Os)

Max. 80 m

  • Wire cross-section: 0.2…1.5 mm2 (consider accuracy impact through cable resistance)
  • NOTICE! Restriction: X05…X12 on NTC 1k & NTC 10k: Max. 30 m

Peripheral extension bus (T72, T74)

Max. 30 m

  • 4-wire (2 wires as twisted pair); shielded if cable length >3 m

Factors affecting maximum cable length

Be aware that the cable resistance and the influence of EMC as well as the hum increases with the length of the cable and has an impact on the accuracy of the analogue value. If the maximum cable length can be reached in an application depends on factors like selection of cable type, dimension, shielding, wiring, distance to high power devices, the requirements regarding measurement and control accuracy etc. and is in the responsibility of the customer.

Important: Siemens does not guarantee any maximum cable lengths.

NOTICE

Installation of connections as per:

- Load

- Local regulations