The IA-3128-U is an intelligent 24-ch Relay Controller, with 24-ch Isolated Digital Input and multi-drop operation capability, in the original IA-3131 foot print. The IA-3128-U is an Industrial grade relay controller, easy operated, supported by a simple, yet, powerful command set. Rich software support, including open source code samples, setting utility and sequence operation program makes it fast and easy adaptable device. The IA-3128-U is part of the IA-3000 Series. This series include Relay controllers, Digital and Analog controllers, usually equipped with RS-232/485, USB, IP or wireless communication ports.