Hardware reference guide

CPU Modules
132
35013379 11/2011
Modbus Ports Pinout Connections for Portable Computers
The following figure shows the Modbus port connections for nine-pin portable
computer connections.
The following is the abbreviation key for the above figures.
TX: Transmitted Data DTR: Data Terminal Ready
RX: Received Data CTS: Clear to Send
RTS: Request to Send N/C: No Connection
DSR: Data Set Ready CD: Carrier Detect