[原创] Maxim MAX22192集成数字隔离八路数字输入器件解决方案

Maxim公司的MAX22192是IEC 61131-2兼容的集成了数字隔离的八路工业数字输入器件,隔离电压600VRMS 60秒,直接从现场供电(7V-65V)工作,和1.8V,3.3V或5V逻辑兼容,±8kV接触ESD和±15kV空气隙ESD,采用1kΩ电阻有±1kV耐浪涌,工作温度-40℃ 到 +125℃,主要用在可编逻辑控制器,工业自动化,过程自动化.本文介绍了MAX22192主要优势和特性,绝缘八数字输入框图和功能框图,应用框图以及评估系统MAX22192 EVS主要特性,系统框图,电路图,材料清单和PCB设计图.

The MAX22192 is an IEC 61131-2 compliant industrial digital input device with integrated digital isolation. The MAX22192 translates eight, 24V current-sinking, indus­trial inputs to an isolated serialized SPI-compatible output that interfaces with 1.71V to 5.5V logic voltage. A current-setting resistor allows the MAX22192 to be configured for Type 1, Type 2, or Type 3 inputs. For proximity switches, the field-wiring is verified using the wire break feature. When wire break is enabled, the LFAULT output is assert­ed and a register flag set if the input current drops below the wire break threshold for more than 20ms. Additional diagnostics that assert LFAULT include: overtemperature protection, low 24V field supply, 24V field supply missing, and CRC communication error.
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