The Flex I/O system contains I/O modules, terminal bases, and network adapters. This system can be powered by a Flex power supply or any other compatible power source. You can use up to eight terminal bases for each adapter. This configuration can allow a wide variety of I/O channels per adapter as well as mixing and matching with digital and analog. This system can also use specialty I/O modules to meet your specific needs. The Flex I/O System can be mounted vertically or horizontally on 35mm DIN rail or panel mounted . These modules also come in XT versions which are coated to operate in extreme environments. These modules operate in a temperature range from -20C to 70C.