Rockwell Automation Publication 2711P-UM006E-EN-P - January 2017 145
Terminal Connections Chapter 6
Modem Connection
Wire or radio modem communication is possible between the terminal and
controller. Each modem must support full duplex communication. Refer to your
modem user manual for details on settings and configuration.
Figure 17 - Modem Connection
Construct a Null Modem Cable
To construct a null modem cable, refer to this pinout.
Table 67 - Null Modem Pinout
Pin Description
PanelView Plus 6
9-pin
9-pin
M o d e m
PanelView Plus 6
9-pin
25-pin
Modem
Pin Symbol
FG (Frame Ground) - - - 1 FG
TD (Transmit Data) 3 2 3 3 RD
RD (Receive Data) 2 3 2 2 TD
RTS (Request to Send) 7 8 7 5 CTS
CTS (Clear to Send) 8 7 8 4 RTS
SG (Signal Ground) 5 5 5 7 SG
DSR (Data Set Ready) 6 4 6 20 DTR
DTR (Data Terminal Ready) 4 6 4 6 DSR
PanelView Plus 6 Terminal
DF1 Port
Modem
Modem
Optical Isolator
Controller
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