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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
PanelView™ 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
8
RS-485-
A(-)
(not used)
1
2
3
4
6
7
8
5