Description

The MAX22191 is an IEC 61131-2 compliant, industrial digital input (DI) device. The MAX22191 translates a 24V industrial switching signal to a 3.3V/5V CMOS-level output, or to a 2.3mA (typ) current output for driving an optocoupler and/or LED. Voltage thresholds and current levels in the MAX22191 are compliant with Type 1 andType 3 inputs, while minimizing power dissipation. The MAX22191 is also compliant with 48V inputs, with theaddition of external resistors.Operating power is derived from the input signal, eliminating the need for an external field-side power supply. A 250ns (max) fast response time is ideal for high-speed inputs. Additionally, a CMOS-compatible test input is available for safety diagnostics.The MAX22191 features robust functionality for harsh industrial systems and is capable of normal operation with input signals ranging from -60V to +60V. Integrated thermal shutdown further protects the device when VCC is present.The MAX22191 is available in a small, 6-lead SOT23 package and operates over the -40°C to +125°C ambient temperature range. Design Solution: Worried About Heat in Your I/O Module? No Need to Sweat ›ApplicationsCurrent Sourcing InputsIndividually Isolated InputsIndustrial AutomationMotor ControlsProcess Automation