USB-COM485-PLUS-4 FTDI, USB-COM485-PLUS-4 Datasheet - Page 2

• Manufacturer Part Number: USB-COM485-PLUS-4
• Description: MODULE, DEV, USB-RS485, 4 COM PORT
• Manufacturer: FTDI
• Type: Developmentr

Specifications of USB-COM485-PLUS-4

• Mcu Supported Families: FT232R, FT2232, FT232BM
• Kit Features: Works With USB 1.1 & 2.0 Host And Hub Ports, FIFO
• Svhc: No SVHC (18-Jun-2010)
• 2.0 Host And Hub Ports, Fifo: 2KB Transmit Buffer, 2KB Receive Buffer
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document Reference No.: FT_000153
USB-COM485-PLUS4 Datasheet
Version 1.2
Clearance No.: FTDI# 108
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Introduction
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Functional Description
The USB-COM485-PLUS4 is a USB to a quad interface RS485 level serial UART adaptor incorporating
FTDI’s FT4232H Hi-Speed USB2.0 (480Mb/s) to quad serial UART interface IC device. The FT4232H
handles all the USB signalling and protocols. The adaptor provides a fast, simple way to connect devices
with an RS485 interface to USB.
USB-COM485-PLUS4 is a USB to a quad-port RS485 adapter.
The integrated electronics of the USB-COM485-PLUS4 utilise the FTDI FT2232H 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-PLUS4
The module uses a standard USB mini-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 10Mbps.
The USB-COM485-PLUS4 module requires USB device drivers, available free from www.ftdichip.com,
which are used to make the USB-COM485-PLUS4 appear as a Virtual COM Port (VCP). This allows existing
serial communications software, such as HyperTerminal, to exchange data through the USB-COM485-
PLUS4 to a legacy RS485 peripheral device.
Copyright © 2010 Future Technology Devices International Limited
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