Document Reference No.: FT_000120
USB to RS485 UART Serial Converter PCB Datasheet
Version 1.2
Clearance No. FTDI#80
4
USB-RS485-PCB Connector Pin Out and Mechanical details
TOP
BOTTOM
RED
LED
GRN
LED
FT232R
RS 485
Transceiver
Resistor
Termination 1
Resistor
Termination 2
5V
Data-
Data+
GND
USB-RS485-PCB Rev 1
RED
5V
TOP
LED
GND
GRN
LED
RS 485
Transceiver
Data -
Data +
120 ? Resistor
Termination 1
BOTTOM
FT232R
120 ? Resistor
Termination 2
GND
5V
USB-RS485-PCB Rev 2
Figure 4.1 USB-RS485-PCB Pin Out (Top is TOP View, Bottom is BOTTOM View)
The mechanical details of the PCB are shown in the following diagram Figure 4.2
Additional pads were added to the PCB to allow for easier wiring which resulted in a Rev 2 PCB. There
were no other changes between Rev 1 and Rev 2.
Copyright ? 2011 Future Technology Devices International Limited
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