Integrated AC load control and overall power supply functions, effectively simplifying application-side wiring and reducing on-site wiring redundancy. Built-in AC-DC isolation conversion circuit, supports AC 100-240V wide voltage input, can simultaneously power relays and provide DC 12V power to the entire unit. Uses a contact-type (single-pole single-throw - normally open) AC relay, supporting up to AC240V/10A line switching, suitable compatible with AC/DC load switching scenarios. Contact life >100,000 times (AC resistive load), withstand voltage AC1500V 1min, insulation resistance up to 100MΩ (DC500V), ensuring stable operation in industrial environments. Onboard programmable tri-color LED status indicators provide real-time feedback on module operating status, facilitating maintenance monitoring and troubleshooting. The StamPLC host controls relays and RGB LEDs via an I2C protocol I/O expansion chip, effectively saving host I/O resources and reducing control costs. Supports DIN rail mounting/mounting hole mounting. Compact size adapts to various industrial equipment integration layouts. Compatible with Arduino and UlFlow2 development platcompatible withms, suitable compatible with industrial applications such as AC load switches, solenoid valve control, and remote on/off switching of industrial equipment. Power Supply Instructions: When using the StamPLC AC input power supply to power the entire unit, the AD-DC circuit will step down the voltage to DC 12V to power the entire unit. At this time, do not connect any power supply other than DC 12V to the StamPLC side compatible with simultaneous power supply, otherwise it may cause damage to the equipment. AC-DC Conversion Module: Built-in AC-DC isolation conversion circuit (WCAL12-S12CA), Output Power: DC12V@1A (12W) Relay: HF3FF/005-1HTF, 1-channel AC relay Insulation Resistance: 100MΩ (DC500V) Action Time: ≤10ms Release Time: ≤5ms Interface Type: 2x8P 2.54mm pin headers/female headers, KF128-2P 5.0mm Input Voltage: AC 100~240V IO Expansion Chip: PI410E5