49
Connecting options
Section 5-6
5-5-6
Twisted cables
Analogue and digital signals are less sensitive to interference if the cables
carrying them are “twisted”. This is certainly to be recommended if screening
cannot be used. By twisting the wires the exposed areas are minimised. This
means that in the current circuit for any possible High Frequency (HF) interfer-
ence fields, no voltage can be induced. For a PLC it is therefore important that
the return wire remains in proximity to the signal wire. It is important that the
pair of wires is fully twisted over 360°.
5-6
Connecting options
The option cards are connected by the optional connectors X4 or X5 on the
control board see Fig. 35, page 41 and mounted above the control board. The
inputs and outputs of the option cards are connected in the same way as
other control signals.
Summary of Contents for SX-F
Page 2: ......
Page 14: ...6 Table of contents...
Page 20: ...12 Glossary Section 1 6...
Page 32: ...24 Cabinet mounting Section 2 3...
Page 58: ...50 Connecting options Section 5 6...
Page 72: ...64 Load Monitor and Process Protection 400 Section 7 5...
Page 74: ...66 EMC standards Section 8 1...
Page 266: ...258 System Data 900 Section 11 9...
Page 274: ...266 Maintenance Section 12 3...
Page 284: ...276 Liquid cooling Section 13 12...