NEC PX-42VM3A User Manual - Page 45

External Control Application These specifications cover the communications control of the plasma monitor by external equipment. Connections Connections are made as described below. plasma monitor External equipment e.g., Personal computer Communication Parameters (1) Communication system Asynchronous (2) Interface RS-232C (3) Baud rate 9600 bps (4) Data length 8 bits (5) Parity Odd (6) Stop bit 1 bit (7) Communication code Hex 1) Connector on the plasma monitor side: EXTERNAL CONTROL connector. Type of connector: D-Sub 9-pin male No. Pin Name 1 No Connection 2 RXD (Receive data) 3 TXD (Transmit data) 4 DTR (DTE side ready) 5 GND 6 DSR (DCE side ready) 7 RTS (Ready to send) 8 CTS (Clear to send) 9 No Connection 12345 678 9 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). E-39