BD Simex RS-232 Kullanıcı Kılavuzu - Sayfa 6

Medya Dönüştürücü BD Simex RS-232 için çevrimiçi göz atın veya pdf Kullanıcı Kılavuzu indirin. BD Simex RS-232 12 sayfaları. Converter module

User manual for RS-232 to RS-485 converter module PMT-2/4-Z45

Due to possible significant interference in industrial installations appropriate measures

assuring correct operation of the unit must be applied. To avoid the unit of improper

indications keep recommendations listed below.

Avoid common (parallel) leading of signal cables and transmission cables together

with power supply cables and cables controlling induction loads (e.g. contactors).

Such cables should cross at a right angle.

Contactor coils and induction loads should be equipped with anti-interference

protection systems, e.g. RC-type.

Use of screened signal cables is recommended. Signal cable screens should

be connected to the earthing only at one of the ends of the screened cable.

In the case of magnetically induced interference the use of twisted couples of signal

cables (so-called "spirals") is recommended. The spiral (best if shielded) must be

used with RS-485 serial transmission connections.

In the case of interference from the power supply side the use of appropriate anti-

interference filters is recommended. Bear in mind that the connection between the

filter and the unit should be as short as possible and the metal housing of the filter

must be connected to the earthing with largest possible surface. The cables

connected to the filter output must not run in parallel with cables with interference

(e.g. circuits controlling relays or contactors).

The connections should be made accordingly to sticker on the top of converter's housing

(Figure 4.1 - 4.2).

Figure 4.1. Method of cable insulation replacing and cable terminals