Features: Brand new and high quality RTU Analog Output 8CH is an industrial standard analog output Modules, supports 8ch simultaneous output. Adopts RTU protocol with built-in protections circuits such as power isolation, magnetical isolation and TVS. Configurable device address (1~255), multi devices can be cascaded on RS485 bus Onboards voltage regulator, supports 7~36V wide ranges power supply Onboards unibody power supply isolation, provides stable isolated voltage, needs no power supply for the isolated terminal Onboards unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference Onboards resettable fuses and TVS (Transient Voltage Suppressor), effectively suppresses surges voltage and transient spikes voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic 12-bit DA conversion, using high-precisions resistors for more accurate output data External LEDs for indicating the MCU status and signal transceiving status Specifications: Material:Plastic Size:Approx.72x121mm/2.83x4.76inch Package Includes: 1 Set RTU Analog Modules note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.