Proface PS4800 - 19 Panel PC" - Manual (Page 36)

PS-4000B Series User Manual
36
COM Expansion Board (Built-in option)
COM Expansion Board Pin Assignments: This interface is a Built-in option. It is a
combined RS-232C/RS-422/RS-485 interface with D-SUB 9 pin connector. The
operating mode (RS-232C/RS-422/RS-485) is selected automatically, depending on
the electrical connection.
The RS-232C pin assignments are different between the serial interface and the
COM Expansion Board.
Do not connect anything to pins 1, 4, 6, and 9 when using RS-232C with the COM
Expansion Board.
CAUTION
UNINTENDED PIN WIRING
z Do not connect anything to n.c. pins.
Failure to follow these instructions can result in injury or equipment damage.
COM Expansion Board Pin Assignments
Connector D-Sub 9 pin plug
Type RS-232C not modem compatible;
Electrically isolated
UART 16550 compatible, 16 byte FIFO
Transfer rate Max. 115 kBit/s
Cable length Max. 15 meters
(49.21 feet) Max. 1200 meters
(3937.01 feet)
Pin Assignments
(RS-232C) Assignments
(RS-422)
1 n.c. TXD\
2 RXD n.c.
3 TXD n.c.
4 n.c. TXD
5 GND GND
6 n.c. RXD\
7 RTS n.c.
8 CTS n.c.
9 n.c. RXD
1 5
6 9