52 Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
Chapter 4 Wire Your Controller
Embedded Serial Port
Wiring
The embedded serial port is a non-isolated RS-232/RS-485 serial port, which is targeted to be
used for short distances (<3 m) to devices such as HMIs.
See Embedded Serial Port Cables
on page 21 for a list of cables that can be used with the
embedded serial port 8-pin Mini DIN connector.
For example, the 1761-CBL-PM02 cable is typically used to connect the embedded serial port to
PanelViewâ„¢ 800 HMI using RS-232.
Embedded Serial Port
D
DC COM
OUT
+V DC
S
G
+
–
24V supply
Logic side
User side
Load
Fuse
Source output wiring example
Micro800 source output
Com
Fuse
24V
DC
I/P
+
~
Source input wiring example
Pinout Explanations
Pin Definition RS-485 Example RS-232 Example
1 RS-485+ B(+) (not used)
2 GND GND GND
3 RS-232 RTS (not used) RTS
4 RS-232 RxD (not used) RxD
5 RS-232 DCD (not used) DCD
6 RS-232 CTS (not used) CTS
7 RS-232 TxD (not used) TxD
8RS-485- A(-) (not used)
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