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1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodRS485™ Reference Manual

Revised November 10, 2014

This manual applies to the PmodRS485 rev. B

DOC#: 502-310

Other product and company names mentioned may be trademarks of their respective owners.

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Overview

The Digilent PmodRS485 uses the ADM2582E from Analog Devices to provide signal and power isolation for high

speed communication lines utilizing RS-485 communication protocol. The PmodRS485 electronically isolates

devices up to +/- 15kV allowing for peace of mind while combining high voltage hardware with Digilent

microcontroller and FPGA system boards.

1 Functional Description

Basic usage of the PmodRS485 is to facilitate RS-485 and RS-422 serial communication protocols between devices

in environments with high electrical noise. The PmodRS485 can operate at half or full duplex modes with

differential paired signals while providing electrical isolation from other devices.

The PmodRS485 easily interfaces with Digilent Pmod headers and will operate at 3.3V and 5.0V, allowing for

connections to a wide variety of hardware. The controlling hardware can then communicate with devices using

standard serial communication protocols, such as UART.

The PmodRS485.

- Isolated RS-485 / RS-422 interfaces

- 16Mbps maximum data rate

- Connect up to 256 nodes on one bus

- Differential Half or full-duplex communication

- Operates with 5V or 3.3V input voltage and digital

signal levels

- +/- 15kV ESD protection

- Thermal shutdown protection

Features include:

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1300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodRS485™ Reference Manual Revised November 10, 2014 This manual applies to th

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Digilent 410-310P Bedienungsanleitung