System manual CECX / Serial option module CECX-C-S1
CECX-II 31-7
31.5 Connections and wiring
31.5.1 Wiring and shielding
This section covers issues that concern in particular the serial interface
connections.
For all serial interfaces holds true:
z Use shielded cables
z Contact shield directly at metallic interface plug casing
Required cable (must be shiel-
ded in all cases)
Take account of line
termination
RS 232 C Standard line no
verdrillte 2-Drahtleitung
Signalmasse
Schirm mit Schirmmass
Twisted 2-pair line
Signal ground
Shield with shield ground
Structure of a shielded twisted pair wiring with signal ground
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