Allen-Bradley Micro870

Rockwell Automation Publication 2080-UM002K-EN-E - March 2019 55
Wire Your Controller Chapter 4
Embedded Serial Port
Wiring
The embedded serial port is a non-isolated RS232/RS485 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8 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 Component HMI using RS232.
Embedded Serial Port
Pinout table
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)
IMPORTANT
• Do not connect the GND pin of the serial port to Earth/Chassis
Ground. The GND pin of the serial port is the DC common for the
Serial Port Communication signals and is not intended for Shield
Ground.
• If the length of the serial cable is more than 3 meters, use an isolated
serial port, catalog number 2080-SERIALISOL.
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