USB-COM485-PLUS1 FTDI, USB-COM485-PLUS1 Datasheet - Page 7

• 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

2
2.1
2.1.1 Wiring
Insert the A-plug into an available USB Host or Hub port. Insert the B-plug into the B-receptacle on the
USB-COM485-Plus1.
Table 2.1 RS485 DTE to DCE connection
Figure 2.1 USB-COM485-PLUS1 Termination resistor
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
N/A
N/A
PWR = +5V DC output
Copyright © 2010 Future Technology Devices International Limited
Pin 2 of 120R Terminating Resistor. Only Required if the USB-
COM485-PLUS1 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-PLUS1 is the first or last device in a multi-drop RS485
System, to meet RS485 Termination Requirements.
Expected Connect Signal
DATA+
DATA-
GND
PWR
Document Reference No.: FT_000132
N/A
N/A
N/A
N/A
USB-COM485-PLUS1 Datasheet
Clearance No.: FTDI# 95
Version 1.21
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