Why do not the adm3485?


Hello!

It is necessary to connect the device(master) to a single sensor(salve), but device(master) have adm3485 and single sensor(slave) have adm485. When there is a transfer from the master to the slave, the data is successfully reach.When there is a transfer from slave to the master, master can not count the data. The oscilloscope shown that after adm3485 a logic zero at the level 1.4 V. Why is this happening?

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