USER MANUAL
CHAPTER 2
HARDWARE INSTALLATION
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CHAPTER 2: HARDWARE INSTALLATION
This chapter provides information on external connectors on IHMH100 M-Series Box PC
and hardware specifications and installation instruction.
2.1 Connector Pin Assignments
This section includes I/O side connectors and its pinouts.
2.1.1 Isolated DC in Connector
IHMH100 has a 3pin terminal block that accepts DC in 12~24V.
2.1.2 Audio In and Audio Out
2.1.3 COM1 Serial Port Connector
The IHMH100 Box PC uses D-SUB 9pin connector to connect serial interfaces. Serial
COM1 settings can be configured for RS-232, RS-422 or RS-485 by jumpers located on the
motherboard.
Voltage
Minimum Voltage 12V
Maximum Voltage 24V
Maximum Current 6.6A
Color
Signal Name
Blue
Line In
Green
Line Out
Pin №
RS-232
(Default)
RS-422
RS-485
1
DCD
TxD-
D-
2
RXD
TxD+
D+
3
TXD
RxD+
NC
4
DTR
RxD-
NC
5
GND
GND
GND
6
DSR
NC
NC
7
RTS
NC
NC
8
CTS
NC
NC
9
RI
NC
NC