VIPA SSM-BG41 - Fig. 3-9: RS232 C Interface: Connection Without a Handshake

Manual BG41/BG42/BG43 Interface modules
Rev. 99/49 3-11
3.2.2.3 Connection without a handshake
If the peripheral equipment does not have a handshake signal at its disposal, it is possible to operate
without a hardware handshake. In this case according to VIPA, the RTS/CTS should always be
bridged!
With this type of connection it must be insured, that no character is lost. This can be achieved by
observing the following points:
•= a low baud rate or a quick recording of characters by the peripheral equipment
•= a quick disposal of reception buffers on the PLC side
Fig. 3-9:RS232C interface: connection without a handshake
Observe screening! See construction guidelines!