Wika DI35 Manuel d'utilisateur télécharger pdf (Page 17)

6 Commissoning, operation

WIKA operating instructions digital indicator model DI35-M 17

Serial interface

RS 232:

The lines for the RS 232 interface must be connected 1:1, TxD to TxD and

RxD to RxD.

RS 485:

The RS 485 interface is connected via a shielded data line with a twisted pair.

At each end of the bus, a termination of the bus lines must be connected.

This is necessary to guarantee reliable data transmission on the bus. For this,

a resistance of 120 Ohm is inserted between the lines Data B(+) and Data

A(–).

CAUTION!

The potential reference can lead to a compensating current

(interface ⇔ measuring input) with a non-galvanic insulated

interface and can thus affect the measuring signals

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Wika DI35 Manuel d'utilisateur Page 17