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EXTERNAL CONTROLS
Application
These specications 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
1) Connector on the plasma monitor side: EXTERNAL
CONTROL connector.
Type of connector: D-Sub 9-pin male
No. Pin Name No. Pin Name
1 No Connection 8 CTS (Clear to send)
2 RXD (Receive data) 9 No Connection
3 TXD (Transmit data)
4 DTR (DTE side ready)
5 GND
6 DSR (DCE side ready)
7 RTS (Ready to send)
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).
If DTR (4) and DSR (6) are not available, these 2 pins can be
ignored. If RTS (7) and CTS (8) are not available, these 2 pins can
be tied together.
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
5
9
6
2
3 4
7
8