USB-COM422-PLUS2 FTDI, USB-COM422-PLUS2 Datasheet - Page 7

• Manufacturer Part Number: USB-COM422-PLUS2
• Description: Interface Modules & Development Tools USB HS to RS422 Conv Assembly 2 DB9 Ports
• Manufacturer: FTDI

Specifications of USB-COM422-PLUS2

• Interface Type: USB, RS-422
• Data Bus Width: Serial
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: FT2232H
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: USB-COM422-PLUS-2

2
2.1
2.1.1 Wiring
Insert the A-plug into an available USB Host or Hub port. Insert the mini-B-plug into the USB mini-B-
receptacle on the USB-COM422-PLUS2.
The USB-COM422-Plus2 follows EIA-422 standard as a Data Terminal Equipment (DTE) device. If the
RS422 equipment being connected is a Data Communication Equipment (DCE) device, it’s typical that a
straight-through cable can be used.
Table 2.1 – RS422 DTE to DCE connection with straight-through cable
Some serial devices may require certain handshake signals to be connected. Refer to your device manual
for cabling details.
DTE Pin Number
Installation
Example Applications and Configurations
1
2
3
4
5
6
7
8
9
Signal Name
TXD- = Transmit Data,
negative polarity
TXD+ = Transmit Data,
positive polarity
RXD+ = Receive Data,
positive polarity
RXD- = Receive Data,
negative polarity
GND = signal ground
RTS- = Request To Send,
negative polarity
RTS+ = Request To Send,
positive polarity
CTS+ = Clear To Send,
positive polarity
CTS- = Clear To Send,
negative polarity
Copyright © 2010 Future Technology Devices International Limited
Expected Connect Signal
RXD+
TXD+
CTS+
RTS+
RXD-
TXD-
CTS-
RTS-
GND
Document Reference No.: FT_000135
USB-COM422-PLUS2 Datasheet
Clearance No.: FTDI#103
Version 1.1
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