MAX22190 Octal Industrial Digital Input

Analog Devices MAX22190 Octal Industrial Digital Input translates eight 24V current-sinking industrial inputs to a serialized SPI-compatible output that interfaces with 3V to 5.5V logic. This IEC 61131-2 compliant industrial digital input device features a current setting resistor that allows it 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 on the Analog Devices MAX22190 is asserted, and a registered flag is set if the input current drops below the wire-break threshold for more than 20ms. Additional diagnostics that assert FAULT include: over temperature, low 24V field supply, 24V field supply missing, and CRC communication error.