High-speed octal digital input device for PLC and automation

Mouser is now stocking the MAX22195 octal industrial digital input device from Maxim Integrated. Created to lessen power, system cost, and size for PLC digital-input subsystems, the device is a highly integrated IEC 61131-2-compliant digital input device for process, industrial, and building automation applications. The device translates eight 24V industrial inputs to a serialised CMOS-compatible, parallel outputs with propagation delay of less than 300ns from input-to-output for all channels. The fault-tolerant, 5mm x 5mm device interfaces with 3V or 5.5V logic and includes a current-setting resistor, enabling engineers to configure the device for IEC 61131-2 Type 1, 2, or 3 inputs. The device incorporates an internal LDO regulator that gives power to digital isolators and other field-side circuits, as well as energy-less field-side LED drivers that satisfy the indicator light demand of IEC 61131-2 with no further power dissipation. The device also provides surge protection to ±1kV and ±8kV contact ESD and ±15kV air gap ESD protection to add to increased system robustness. The device is supported by the MAX22195EVKIT evaluation system, which offers terminal blocks for all eight inputs and a single header for all eight outputs for easy monitoring and evaluation. Eight field-side LEDs indicate input status, and a READY LED indicates that the device is operating normally.