High-Performance 800 Channel Acquisition Box for Seamless Connectivity. Ultra-Long Distance Transmission: Powered by 4th-generation ZSTC drive circuitry and algorithms, supporting stable transmission up to 1600 meters to resolve signal attenuation over long distances in l. Massive 800-Node Capacity: Features 4 independent collection channels, with each channel supporting up to 255 sensors, allowing a single unit to handle up to 800 temperature and humidity points simult. Industrial-Grade Anti-Interference: Equipped with dedicated discharge and anti-interference modes to effectively shield against electromagnetic noise from high-voltage cables and frequency converters. Broad Sensor & Wiring Compatibility: Fully compatible with DS18B20 (and domestic equivalents) and SHT31 single-bus sensors, supporting both 3-wire (powered) and 2-wire (parasitic power) modes. Dual RS485 & Flexible Debugging: Features dual RS485 interfaces for independent master communication (Primary to PLC/upper computer, Secondary to local display), plus a Work/Debug switch for easy conf.