Contemporary-control-systems PCI20U Adapters Instrukcja Użytkownika Pobierz pdf (Strona 10)

TD030700-0IG

-4000 AC-Coupled EIA-485 (backplane mode)

The -4000 transceiver is used when backplane mode operation is desired. It is

similar to the -485X transceiver in operation but has some subtle differences.

A maximum of 8 NIMs may be connected on a single bus segment with up to

262 feet of twisted-pair cable. Termination can be accomplished by installing

a TB5-TER, RJ-45 terminator in the unused RJ-45 jack.

For 485X only

For 485D only

Figure 7 — Jumper settings for EIA-485 models.

Electromagnetic Compatibility

The PCI20U series complies with Class A radiated and conducted emissions

as defined by CFR 47 Part 15 and EN55022. This equipment is intended for

use in non-residential areas.

Warning

This is a Class A product as defined in EN55022. In a domestic

environment this product may cause radio interference in which case

the user may be required to take adequate measures.

-485 DC-Coupled EIA-485 (backplane mode)

The -485 transceiver is used when backplane mode operation is desired. All

operating parameters are the same as the -485D transceiver except that the

COM20022 is set for backplame mode operation. Refer to the -485D section

for operating details.

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Contemporary-control-systems PCI20U Adapters Instrukcja Użytkownika Strona 10