ABB RER 133 기술 설명 - 페이지 7

{카테고리_이름} ABB RER 133에 대한 기술 설명을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB RER 133 16 페이지. Bus connection module

1MRS755163

RER 133

Technical Description

Principle of operation

The RER 133 Bus Connection Module is designed to work with RE_ 54_ products.

The module utilizes the RS-232 communication port located on the rear panel of the

RE_ 54_. The module is not designed to be connected to any other ABB product,

nor to any third party products.

REF 542 and REF 542plus are not supported by RER 133.

The signal levels and the functionality of the RER 133 module are defined in the

RS-485 standard. RER 133 module is a regular type of RS-485 interface, meaning

that a maximum of 32 nodes can be connected in a daisy chain type of bus

configuration.

Collision detection on the RS-485 bus is supported when a maximum of 32 nodes

are connected to the same daisy chain. In order for collision detection to operate, the

communication speed has to be set to 4800, 9600 or 19200 bits/s. These speeds are

set by using the DIP switches on the front of the module. For an example on how to

set these DIP switches, please see section "Module configuration" on page 9. When

collision detection is not used, the communication speed does not have to be set.

Fig. 4.-1 Daisy chain

Bus Connection

Module

A050315