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Chapter 2: Hardware installation
BIH11-IHP User’s Manual
JSEL1/JSEL2: RS-232/422/485 Switch Headers for COM1
The headers determine that COM1 belongs to RS-232 (Default), 422, or 485.
JSEL1(JCOM1)
1-2 (Default)
RS-232
3-4
RS-422
5-6
RS-485
JSEL2(JCOM1)
RS-232
RS-422
RS-485
1-3 (Default)
3-5
3-5
2-4 (Default)
4-6
4-6
7-9 (Default)
9-11
9-11
8-10 (Default)
10-12
10-12
COM2/3/4/5/6: Serial Port Headers
Pin Assignment
Pin
Assignment
1
DCD
2
SIN
3
SOUT
4
DTR
5
Ground
6
DSR
7
RTS
8
CTS
9
RI
10
NC
JPC1/2/3/4/5: Serial Port Voltage Switch Jumper for JCOM2/3/4/5/6
Pin 1-2 Close: Pin9=5V
Pin 3-4 Close: Pin9=RI (Default)
Pin 5-6 Close: Pin9=12V
