NEC RS232 PLASMA CONTROL CODES COMMERCIAL MODELS Manual page 3

2) Connector on the external equipment side: Serial port (RS-232C) connector.
See the specifications of the equipment that is to be connected for the type of
connector and the pin assignment.
3) Wiring
Use a crossed (reverse) cable.
Wire the cable so that each pair of data lines cross between the two devices.
These data line pairs are RXD (Receive data) and TXD (Transmit data), DTR
(DTE side ready) and DSR (DCE side ready), and RTS (Ready to send) and CTS
(Clear to send).
Communication Parameters
(1) Communication system
(2) Interface
(3) Baud rate
(4) Data length
(5) Parity
(6) Stop bit
(7) Communication code
Asynchronous
RS-232C
9600 bps
8 bits
Odd
1 bit
Hex
3