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12 •
750-651 (/xxx-xxx) [TTY-Interface 20mA Current Loop]
Description
2.1.1.3 Description
This interface allows the connection of devices which are equipped with a
20 mA current interface.
The wiring to the communication partner is made by the connections TxD,
/TxD, RxD and /RxD.
The interface is working in active, semi-active or passive operation mode. The
module communicates with the control unit over the fieldbus coupler/-
controller.
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 TTY interface guarantees high interference immunity because of the
electrical isolation and the driven loop current.
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 TTY-Interface module 750-651 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 from hardware and software version XXXX3A03...
and up. The version is specified in the manufacturing number, which is part of
the lateral marking on the module.
WAGO-I/O-SYSTEM 750
Busklemmen
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