Description - WAGO I/O-SYSTEM 750 Manual

8 • 750-653 (/xxx-xxx) [Serial Interface RS 485]

Description

2.1.1.3 Description
This interface allows the connection of any device which is equipped with a
RS 485 serial interface.
The wiring to the communication partner is made by the connections TxD,
/TxD, RxD, /RxD and ground.
The screen connection is connected directly to the mounting rail.
The interface works standard-conformal according to DIN 66259.
The connected device may communicate over the fieldbus coupler/-controller
with the control unit directly. The active communication channel works
independently of the higher-level fieldbus system and allows full duplex
operation up to 19200 baud.
Three green LEDs signal readiness for operation and troublefree internal bus
communication as well as the condition of the signal transmission.
The RS 485 interface guarantees high interference immunity because of the
electrically isolated signals.
Any configuration of the specialty modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.
Attention
This module has no power contacts. For field supply to downstream I/O
modules, a supply module will be needed.
The serial interface module 750-653 and its variations can be used with all
couplers/controllers of the WAGO-I/O-SYSTEM 750 (except for the economy
types 750-320, -323, -324 and -327).
This description is valid for hardware and software version XXXX4108.... and
higher. The version is specified in the manufacturing number, which is part of
the lateral marking of the module.
WAGO-I/O-SYSTEM 750
I/O Modules