USB-COM485-PLUS2 FTDI, USB-COM485-PLUS2 Datasheet - Page 3

• Manufacturer Part Number: USB-COM485-PLUS2
• Description: Interface Modules & Development Tools USB HS to RS485 Conv Assembly 2 DB9 Ports
• Manufacturer: FTDI

Specifications of USB-COM485-PLUS2

• Interface Type: USB, RS-485
• 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-COM485-PLUS-2

1.2
The USB-COM485-PLUS2 uses three LEDs to indicate a valid link as well as data traffic according to the
following table:
Table 1.1 – LED Description
1.3
Figure 1.2 USB-COM485-PLUS2 Block Diagram
1.3.1 Block description
USB B Client Connector
This connector provides the interface for connection to a USB Host or Hub port. The maximum cable
length is 5 meters, according to the USB 2.0 specification.
FTDI FT2232H
FT2232H Hi-Speed USB2.0 (480Mb/s) is a dual serial UART interface IC device. Operating system device
drivers are required in order to work with the one to provide the Virtual COM Port serial functionality.
Dual RS485 Level Shifter
The RS485 level shifter converts the signals provided by the FT2232H into the voltage levels required by
RS485 devices.
DE-9P Connector (Male)
The DE-9P connector is configured in an industry standard (TIA/EIA-574) pin-out to provide connection to
RS485 peripherals through standard cables. See section 3.1.2
LED Colour
Connector
Yellow x 1
Green x 2
USB B
Red x 2
Client
LED Description
Block Diagram
Function
RxD Activity
TxD Activity
Power
Hi-Speed USB Serial
Copyright © 2010 Future Technology Devices International Limited
FTDI FT2232H
Bridge
Channel A
Channel B
Description
ON when USB-COM485-PLUS2 is configured and ready
Flashes when data is transmitted from the USB-COM485-PLUS2 to the
attached RS485 device
Flashes when data is transmitted from the attached RS485 device to the
USB-COM485-PLUS2
Level Shifter
Level Shifter
RS485
RS485
Document Reference No.: FT_000136
USB-COM485-PLUS2 Datasheet
Connector
Connector
DE-9P
DE-9P
Clearance No.: FTDI#104
Version 1.2
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