USB-COM485-PLUS1 FTDI, USB-COM485-PLUS1 Datasheet - Page 2

• Manufacturer Part Number: USB-COM485-PLUS1
• Description: Interface Modules & Development Tools USB to RS485 Convrtr Assembly 1 DB9 Port
• Manufacturer: FTDI

Specifications of USB-COM485-PLUS1

• Interface Type: USB, RS-485
• Data Bus Width: Serial
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: FT232R
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: USB-COM485-PLUS-1

Document Reference No.: FT_000132
USB-COM485-PLUS1 Datasheet
Version 1.21
Clearance No.: FTDI# 95
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Introduction
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Functional Description
The USB-COM-Plus modules are a family of communication devices. This model, USB-COM485-Plus1,
provides a simple method of adapting legacy serial devices with RS485 interfaces to modern USB ports.
This is accomplished by incorporating the industry standard FTDI FT232R USB-Serial bridge chip.
The integrated electronics of the USB-COM485-PLUS1 utilise the FTDI FT232R and includes RS485 level
shifters plus TXD/RXD LEDs to provide a visual indication of data traffic through the module.
Figure 1.1 USB-COM485-Plus1
The module uses a standard USB-B device connector for connection to an upstream host or hub port.
RS485-level signals are available on an industry-standard DE-9P connector. The maximum RS485-level
data rate is 3Mbps.
Pin 9 of the DE-9P connector can provide +5V DC at 250mA.
The USB-COM485-Plus1 module requires USB device drivers, available free from www.ftdichip.com, which
are used to make the USB-COM485-Plus1 appear as a Virtual COM Port (VCP). This allows existing serial
communications software, such as HyperTerminal, to exchange data through the USB-COM485-Plus1 to a
legacy RS485 peripheral device.
Copyright © 2010 Future Technology Devices International Limited
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