USB-COM485-PLUS2 FTDI, USB-COM485-PLUS2 Datasheet - Page 7

• 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

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-COM485-PLUS2.
Table 2.1 – RS485 DTE to DCE connection
Figure 2.1 USB-COM485-PLUS2 Termination resistor and echo disable
DTE Pin Number
Installation
Example Applications and Configurations
1
2
3
4
5
6
7
8
9
Signal Name
DATA- = Transmit/Receive
Data, negative polarity
Also Terminator 2
DATA+ = Transmit/Receive
Data, positive polarity
Terminator 1
N/A
GND = signal ground
N/A
echo enable terminal 1
echo enable terminal 2
PWR = +5V DC output
Copyright © 2010 Future Technology Devices International Limited
Pin 2 of 120R Terminating Resistor. Only Required if the USB-
COM485-PLUS2 is the first or last device in a multi-drop RS485
System, to meet RS485 Termination Requirements.
Pin 1 of 120R Terminating Resistor. Only Required if the USB-
COM485-PLUS2 is the first or last device in a multi-drop RS485
System, to meet RS485 Termination Requirements.
Local echo function control. Connect to pin 8 can disable the
Local echo function control. Connect to pin7 can disable the
local echo function. The local echo is enabled by default.
local echo function. The local echo is enabled by default.
Expected Connect Signal
DATA+
DATA-
GND
PWR
Document Reference No.: FT_000136
N/A
N/A
USB-COM485-PLUS2 Datasheet
Clearance No.: FTDI#104
Version 1.2
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