6 | Chapter 1: Introduction
BIH61-IHP User’s Manual
1�3 Rear Panel Connectors
CN1: COM Port (DB9)
Mode
001
000
010
Pin Define
RS-232
(3T/5R)
RS-422
(1T/1R Full
Duplex)
RS-485
(1T/1R TX Enable
Low Active)
1
COM1C_DCD
TX(B)
(R(B) / T(B))
2
COM1C_RXD
TX(A)
(R(A) / T(A))
3
COM1C_TXD
RX(A)
NC
4
COM1C_DTR
RX(B)
NC
5
GND
GND
GND
6
COM1C_DSR
NC
NC
7
COM1C_RTS
NC
NC
8
COM1C_CTS
NC
NC
9
COM1C_RI
NC
NC
