The IA-3158-U is an intelligent 24-ch Power Relay Controller, with 1-ch Isolated Digital Input and multi-drop operation capability. The IA-3158-U is an Industrial grade relay controller, easy operated, supported by a simple, yet, powerful command set. Rich software support, incloding open source code samples, setting utilities and sequence operation program makes it fast and easy adaptable device. The IA-3158-U is part of the IA-3000 Series. This Series include Relay controllers, Digital and Analog controllers, usually equipped with USB, RS-232/485, IP or Wireless communication port.