A compact 16 channel control module that provides flexible input and output options for automation tasks. Outputs: 16 channels driven by ULN2803 NPN outputs for reliable, low drive switching of relays, solenoids, or indicator loads. Inputs: 16 photoelectric isolated inputs with NPN low level active to protect the control system from field noise and transients. Remote control: 16 inputs can remotely control 16 outputs on another board over an RS485 bus; ensure the corresponding registers are configured on both ends. Operation modes: six command options to match different logic needs open, close, momentary, self locking, interlock and delay. Design and reliability: compact form factor suitable for standard control panels; rugged, durable construction for industrial use; low power consumption and clean signal conditioning. Compatibility and performance: easy integration with existing RS485 networks and standard control software; fast, deterministic response for real time control. Use scenarios Industrial doors, gates or valves requiring interlocks and delay sequences. Centralized control of alarms, indicators, or dampers from a master controller. Building automation tasks that require remote actuation across a facility.