JUMO LOGOSCREEN nt - Toggling between RS232 and RS485; Rs232

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3 Connecting the interface
3.2 RS232
The RS232 interface does not use the handshake lines (RTS, CTS). The RTS
line (CTS on the paperless recorder) coming from the master (PC or notebook)
is not taken into consideration. The response is immediately transmitted from
the paperless recorder. The CTS line of the master (RTS on the paperless
recorder) remains open.
If the used program evaluates the handshake lines, they must be bridged in
the cable.
PC COM
interface with 9-
pin Sub-D
socket
PC COM
interface with
25-pin Sub-D
socket
3.3 Toggling between RS232 and RS485
Toggling between RS232 and RS485 interface is carried out by means of the
paperless recorder parameter
Configuration
 Interface  RS232/RS485  General  Type
or via the setup program
Edit
 Serial interface  RS232/RS485  Type
(2) RxD
(3) TxD
(5) GND
RxD
TxD
RTS
CTS
GND
(2)
(3)
(7)
(8)
(5)
Paperless recorder
PC/notebook
(2) RxD
(3) TxD
(5) GND
TxD
RxD
RTS
CTS
GND
(2)
(3)
(4)
(5)
(7)
Paperless recorder
PC/notebook