USB2-H-1016-M Datasheet, PDF (14/38 Pages) List of Unclassifed Manufacturers – USB2-H-100X-M FAMILY Hi-Speed USB to Multi-Ports RS232 Adapter

Document Reference No.: ES_000057
USB2-H-100X-M FAMILY Hi-Speed USB to Multi-Ports RS232 Adapter Data Sheet
Version 1.0
Clearance No.: ES #43
2 Installation
2.1 Hardware Configurations
Insert the A-plug of USB cable into an available USB Host or Hub port. Insert the B-plug of USB cable
into the B-receptacle on the USB2-H-100X-M.
2.1.1 Wiring
RS232 interfaces have followed a standard 9-pin configuration on a D-sub connector since the mid
1980s. The USB2-H-100X-M family follows this standard as a Data Terminal Equipment (DTE) device. If
the RS232 equipment being connected is a Data Communication Equipment (DCE) device, it’s typical that
a straight-through cable can be used.
DTE Pin Number Signal Name
DCE Pin Number
1
DCD = Data Carrier Detect
1
2
RXD = Receive Data
2
3
TXD = Transmit Data
3
4
DTR = Data Terminal Ready
4
5
GND = RS232 signal ground
5
6
DSR = Data Set Ready
6
7
RTS = Request To Send
7
8
CTS = Clear To Send
8
9
RI = Ring Indicator
9
Table 2.1 – RS232 DTE to DCE connection with straight-through cable
If any USB2-H-100X-M module is connected to another DTE device, a serial “null-modem” cable should
be used. A null-modem cable handles connecting output signals to the corresponding input signals on the
other end. Table 2.2 shows a typical null-modem cable. Note that RI and DCD are not always used.
DTE Pin Number Signal Name
DTE Pin Number
2
RXD = Receive Data
3
3
TXD = Transmit Data
2
4
DTR = Data Terminal Ready
6
5
GND = RS232 signal ground
5
6
DSR = Data Set Ready
4
7
RTS = Request To Send
8
8
CTS = Clear To Send
7
Table 2.2 – RS232 DTE to DTE connection with null-modem cable
©2012 EasySYNC Ltd.
14