Device Description - WAGO 750-652 Manual

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Device Description

3 Device Description
The I/O module 750-652 (Serial Interface RS-232 / RS-485) allows the optional
connection of devices with a RS-485, RS-422 or RS-232 interface.
It also provides gateways between the serial interface and the fieldbus systems
supported by the WAGO-I/O-SYSTEM 750.
No higher protocol level is required by the module. Communication to the
associated fieldbus master is completely transparent. This provides for a broader
application scope for the serial interface module. If required, communication
protocols can be configured via fieldbus master.
The 2560 byte input buffer provides for high data baud rates. At lower baud rates,
the data received in lower priority tasks is evaluated without data loss.
The 512-byte output buffer provides fast transmission of larger data strings.
The operating mode of the I/O module can be configured with the start-up tool
WAGO-I/O-CHECK 3.3 (firmware version 03 or higher requires WAGO-I/O-
CHECK version 3.5.3 or higher).
NOTE
The default operating mode is RS-485 half-duplex. The default data transmission
rate is 9600 baud. 1 start bit, 8 data bits and 1 stop bit are sent. There is no parity
generation and dataflow control.
Before starting operation, the connections of the I/O module must be cabled
appropriately (see section "Connect Devices" > ... > "Connection Examples" ).
In RS-232 mode, the interface works in accordance with the TIA/EIA-232-F and
CCITT V.28/DIN 66259-1 standards.
In RS-485/RS-422 mode, the interface works in accordance with the TIA/EIA-
485-A, DIN 66259 standards.
The connected device can communicate directly with the control unit via the
fieldbus coupler/controller used.
The active communication channel works independent of the fieldbus system used
in full or half-duplex operation at up to 115200 baud.
In the data flow control through RTS/CTS in RS-232 mode, a lead time or follow-
on time can be configured for the I/O module for the RTS signal. This function is
available with firmware version 03 or higher.
Direct data exchange between different fieldbus nodes of the 750 series is possible
in conjunction with a second I/O module. This function is available with firmware
version 03 or higher.
WAGO-I/O-SYSTEM 750
750-652 Serial Interface RS-232 / RS-485
Manual
Version 1.4.0