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Technical Appendix – Interfaces
Technical Appendix – Interfaces
The following tables contain the plug assignments for the external connections of
the JRex-IBOX.
Low-active signals are indicated by a minus sign.
Serial Port [COM1 (RS232C)]
Pin Signal Name
1
DCD (Data Carrier Detect)
2
RXD (Receive Data)
3
TXD
(Transmit Data)
4
DTR
(Data Terminal Ready)
5
GND (Signal Ground)
6
DSR (Data Set Ready)
7
RTS
(Request to Send)
8
CTS
(Clear to Send)
9
RI
(Ring Indicator)
USB Port
Pin Signal Name
1
VCC
2
Data-
3
Data+
4
GND
44
9-pin D-SUB Plug
4-pin USB Socket
Type A Version 2.0/1.1
JRex-IBOX – User's Manual
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