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Chapter 1: Introduction
BIH11-IHP User’s Manual
1�3
Rear Panel Connectors
COM1: Serial port Connectors (RS-232/RS422/RS485)
1
5
6
9
RS-232 (Default)
RS-422*
RS-485*
Pin Assignment
1
Carrier detect (DCD)
422 TXD-
485 DATA-
2
Received data (RXD)
422 TXD+ 485 DATA+
3
Transmitted data (TXD)
422 RXD+ NC
4
Data terminal ready (DTR)
422 RXD-
NC
5
Signal ground (GND)
GND
GND
6
Data set ready (DSR)
NC
NC
7
Request to send (RTS)
NC
NC
8
Clear to send (CTS)
NC
NC
9
*RI, 5V, 12V selected by
(selected by JP1 setting)
NC
NC
Note
»
»
COM1 (RS-232/422/485) & COM2 (RS-232) selection is controlled by JSEL1/ JSEL2.
