一. Core Function

• Analog Signal Input and Output: This module provides eight channels of analog input and four channels of analog output for a variety of analog measurement and control applications. It processes analog signals collected by sensors such as temperature, pressure, and flow, and converts digital control system outputs into analog signals for actuator control.
• Redundant Design: Triple redundancy ensures system reliability and stability under complex manufacturing processes and demanding controller requirements, reducing the risk of system downtime due to module failure.
• Environmental Adaptability: It operates within a temperature range of -30 to 65 degrees Celsius and supports a -24 VDC power supply with a load of 12 mA per sensor, making it suitable for harsh industrial environments.

二． Operating Principle

• Signal Conversion: An internal high-precision A/D converter converts input analog signals into digital signals for processing and analysis by the control system. Simultaneously, a D/A converter converts the control system's output digital signals into analog signals to drive external actuators. For example, when a gas turbine's temperature sensor detects a temperature change and transmits the analog signal to the IS220PCLAH1A module, the module converts the signal into a digital signal, allowing the gas turbine's control system to make appropriate control decisions, such as adjusting fuel supply.
• Communication Interface: The module provides an electrical interface with the Ethernet I/O network and the terminal board. It communicates with the external network via dual RJ-45 Ethernet connectors, receiving control commands and data from other devices and transmitting its own processed data.
• Power Supply: A 28V DC power supply powers the module, ensuring the proper operation of its internal circuits and chips and providing energy for signal processing and transmission.
• Redundancy: Its triple-redundancy design ensures that if a channel or part of it fails, the remaining redundant channels will continue to operate, ensuring system operation. For example, when one of the analog input channels fails, the other two redundant analog input channels can take over and ensure that the relevant parameters of the gas turbine can continue to be accurately collected and transmitted.