Advantech HMI-640S, User Manual

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8 0 HMI-640S User's Manual
HMI-640S is shipped together with a serial cable (NULL modem cable)
for customers to make a direct connection between it and the host PC.
Note that off-the-shelf NULL modem cables may not be wired correct-
ly. The following list is the wiring table for this cable:
9-pin NULL Modem Cable:
Remoet host
serial port
connector
Calling system
serial port
connector
Signal
3 2 Transmit Data
2 3 Receive Data
7 8 Request to Send
8 7 Clear to Send
6,1 4
Data Set Ready
and Carrier Detect
5 5 Signal Ground
4 6,1
Data Terminal
Ready