Siemens SIMATIC S7-400 CP 440 - Features of the X27 (RS 422;485) Interface

Product Description
1.4 Features of the X27 (RS 422/485) Interface
Point-to-point connection CP 440 Installation and Parameter Assignment
20 Manual, 09/2007, A5E00057742-03
1.4 Features of the X27 (RS 422/485) Interface
Definition
The X27 (RS 422/485) interface is a voltage-difference interface for serial data transmission
in compliance with the X27 standard.
Properties
The X27 (RS 422/485) interface has the following attributes and is in compliance with the
following requirements:
● Type: Differential voltage interface
● Front connector: 15-pin sub-D female with screwed interlock
● Max. transmission rate: 115.2 Kbps
● Max. cable length: 1200 m at 19200 Bps
● Standard: DIN 66259 Parts 1 and 3, EIA-RS 422/485, CCITT V.11
Note
With the RK 512 and 3964(R) protocols, the X27 (RS 422/485) interface submodule can
only be used in four-wire mode.
Cables
Siemens offers standard cables in various lengths for point-to-point connection between the
communication processor and a communication partner.
See also
X27 (RS 422/485) Interface of the CP 440 (Page 143)
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com