Coaxial Cable Shielding Process - Hitachi EH-150 Applications Manual

Hidic cpu link module (eh-lnk)

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5.1.6 Coaxial cable shielding process

Figure 5.5 shows the shielding line of a shielded coaxial cable when two EH-LNK units are installed on the

basic base (EH-BS3.) The shielding line is only earthed on the RXD (receiving) side as a basic principle.

However, this depends on the noise environment prevalent with the user, so the cable on the TXD

(transmission) side may also be used without cutting off the shielding line. Insulate the ends of non-shielded

lines with the use of insulation tape

Strip off approximately 1m of the shielding from the module (refer to Figure.5.6) Also, ensure that the

stripped area is located well away from power lines and other types of cable.

Repeating terminal block

D-type earth

Figure 5.5 Example of shielding lines

Shield stripping length

approx. 1 m

To ground

Figure 5.6 Stripped transmission cables

5-4

Chapter 5. Installation and start-up

TXD

RXD

Coaxial cable

Portion covered

with shield

Portion covered with

shield

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