is it safe to connect to RS-485 few ADM485 and ADM3485?
Some devices have Vcc=+3,3V and ICs ADM3485 are used for them,
some devices have Vcc=+5V and ADM485 are used.
Yes, both 3.3V and 5V powered RS-485 transceivers can be connected on the same bus, both types of transceiver are RS-485 compliant. Just check that each ADM3485 is powered with 3.3V and each ADM485 is powered with 5V.
We would recommend making sure the bus is properly terminated, for example with 120 Ohm resistors on each of the far ends of the cable (where the cable impedance is also 120 Ohms).
Thank You for quick and comprehensive answer.
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