This document introduces the uses, features, technical specifications, and instructions for the multi-function signal acquisition module (Z7-851). The module has up to 12 channels, and each channel can be independently configured to measure different types of signals such as voltage, current, resistance, and temperature. It is designed with high-performance components and anti-interference circuitry, ensuring good stability and powerful functionality. The module uses the standard Modbus communication protocol and can directly communicate with various devices, making it suitable for remote data acquisition, instrument conversion, process monitoring, and other applications.