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Octal Industrial Digital Input with Diagnostics
General Description
The MAX22190 is an IEC 61131-2 pliant industrial digital input device. The MAX22190 translates eight, 24V current-sinking, industrial inputs to a serialized SPIpatible output that interfaces with 3V to 5.5V logic. A current setting resistor allows the MAX22190 to be configured for Type 1, Type 2, or Type 3 inputs. Field wiring is verified for proximity switches, by a second threshold detector on each input. When wire-break is enabled, the FAULT output is asserted and a register flag is set if the input current drops below...