|Velleman MM107 RS485 Driver Mini Module|
Read the Data Sheet for MM107
22 x 22 x 5mm
|This breakout board is the interface between a serial TTL and a RS485 bus, a serial interface too but in balanced configuration consisting of two wires referred to ground, rather than unbalanced (only one conductor connected to ground) as in the classic TTL.|
The RS485 is a simplex data communication line specifically designed to operate in electrical noisy environments and on long distances, up to 1.2 km.
RS485 is a bus, so it is possible to connect in parallel (to the two line wires) many devices, the farthest of those must be terminated with a 120 Ohm stub resistor between A and B wire. The maximum data rate is 35Mbps up to 10m distance or 100kbps at 1200m.
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