SI700: Interface RS232/RS485

This module converts the electrical characteristics of the communication signal from the EIA/RS232 specification to EIA/RS485 specification.

The converter circuit provides signal isolation to grant a safe connection between two systems.

This module was designed to use the DFI/LC platform and so, no power supply was embedded in the board. It uses the +5Vdc lines from the IMB bus to energize the circuit.

Description

This module converts the electrical characteristics of the communication signal from the EIA/RS232 specification to EIA/RS485 specification.

No control signal is necessary to manage the bus contention at RS485 side. You just need to connect the transmission and reception lines on the both sides to put the interface to work.

Due to fundamental differences between RS232 and RS485 purposes (the first is proper to peer-to-peer applications) this module was implemented to work automatically.