IC693ALG391 is a high-resolution analog input module for the GE Fanuc 90-30 series PLC. It provides four channels of 15-bit analog voltage or current inputs. Each channel can be independently configured voltage or current mode, and the input range can be selected based on the specific requirements of the application. The module is designed to interface with various sensors and transducers, allowing the PLC to monitor and control analog signals in industrial automation systems.