Proface PS4800 - 19 Panel PC" - Manual (Page 103)

PS-4700/4800 Series (Atom N270 / Core 2 Duo P8400 Pre-installed Model) User Manual
103
COM Expansion Board (Built-in option)
The COM Expansion Board is an option which can be pre-installed when shipped.
The serial interface 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 serial interface and COM Expansion
Board use a different pin assignment for RS-232C communication.
When using the COM Expansion Board for RS-232C communication, pins 1, 4, 6
and 9 are not connected to anything.
CAUTION
UNINTENDED PIN WIRING
Do not connect anything to n.c. pins.
Failure to follow the instruction can result in unintended communication.
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