4-7
Interfaces of the Device
4.1.4 RS232 (X3-SER2)
The interface is only designed to be used for downloads, uploads, a scanner or a log-
ging printer because the interface is not electrically isolated.
4.1.4.1 Pin Assignment
Figure 4-6 25 pin D-SUB female connector strip
Connector in the operating device: 25 pin D-SUB female connector strip.
Table 4-8 Pin assignment RS232
Pin Designation Function
1 Low-Noise Ground
2 TD Transmitted Data
3 RD Received Data
4 RTS Request to Send
5 CTS Clear to Send
7 SGND Signal Ground
The D-SUB connector strips must be shielded sufficiently.
See chapter “Shielding D-SUB Connectors“ on page 4-27.
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