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Manufacturer:
AB Electronics
Order number:
EXP-R72-016
Manufacturer part number:
RS485PI
Availability:
6

View additional product data

In stock

Guaranteed shipping date: 21.05.19, if you order within .

€14.99*
Net price: €12.60
Value added tax: €2.39
All prices incl. value added tax

The RS485 Pi is a communication board supporting the RS-485 serial protocol.

The RS-485 port is connected to the UART port on the Raspberry Pi using a SN65HVD72 interface. The SN65HVD72 IC converts the 3.3V UART signals to RS-485 voltages allowing communication with RS-485 compatible devices over a DB9 serial cable or twisted pair cable. The RS-485 port can be accessed through the DB9 port or the solder points on the PCB.

The RS485 Pi contains protection against voltage spikes in the form of a TVS Diode and two 10-Ω, Pulse-Proof Thick-Film Resistors.

Please note that you can only use one RS485 Pi board on a Raspberry Pi. if stacking with other boards we recommend putting the RS485 Pi at the top of the stack due to the height of the DB9 connector.

Note: Before using the RS485 Pi you will need to solder both connectors onto the PCB.  We suggest soldering the 40 pin GPIO connector first and then the DB9 connector.

Features:

  • RS-485 Half Duplex Port.
  • Up to 250 kbps transfer rate.
  • Use the Raspberry Pi to control external RS-485 devices.
  • Stackable with other Raspberry Pi accessory boards.

Specifications:

  • Supply Voltage: 3.3V
  • Logic Voltage at GPIO Port: 3.3V
  • Differential Input Voltage at A & B: -12V to +12V
  • High-level input voltage: 2V
  • Low-level input voltage: 0.4V
  • Signalling Data Rate: 250 kbps
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