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SI700

Interface RS232/RS485


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

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.

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.

 

Technical Specifications:

Number of Communication Channels
1
Data Communication Interface
RS232 / RS485
Baudrate
Up to 200 KBPS enable
RS232 side
Enables RS232 Half-Duplex or Full-Duplex mode
RS485 side
Enables Embedded Bus Terminator activation
Protection RS485
No transmission when the bus is in break state
Isolation
1600 Vrms @ 1 minute
Power Supply
Supplied by the IMB bus, +5 Vdc, @ 100 mA Typical

 

 



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