Specification Brand : PUSR BulletPoint1 : PUSR provides 5 different models of expansion units for users to choose from, please see the table for specific differences between different modules. BulletPoint2 : The USR-IO modular controller supports standard Modbus RTU for data acquisition and control, making integration into control systems extremely straightforward. BulletPoint3 : Industrial Grade Design EMC Protection: Level 3, IEC 61000 Wide Operating Temp: -25℃~+75℃ Hardware Watchdog: Supported BulletPoint4 : Flame retardant rating: V0, burning stops within 10 seconds on a vertical part allowing for drops of plastic that are not inflames. CompatibleDevices : Personal Computer ConnectivityTechnology : Wi-Fi Frequency : 40 GHz FrequencyBandClass : single_band IncludedComponents : IO MODULE ItemName : PUSR 4*AI, 4*DO IO Extender IO Controller Extendable Remote IO Module RS485 Interface Modbus RTU Protocol USR-IO0440 ItemPackageQuantity : 1 ItemTypeKeyword : io-modules Manufacturer : PUSR ModelName : Modular IO Controller IO Module ModelNumber : 4AI4DO NumberOfItems : 1 ProductDescription : Modular IO controller is a new generation IO controller launched by PUSR. It adopts standard RS485 interface, standard ModbusRTU protocol, can achieve fast application matching. With compact size, DIN rail & wall mounting installation, it can save space. ProductSiteLaunchDate : 2025-04-17T03:40:24.510Z RecommendedUsesForProduct : Business SupplierDeclaredDgHzRegulation : unknown SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 43222600 WarrantyDescription : 2 years WirelessCommStandard : 802_11_B