The ADAM-4500 is a fully functional, stand-alone controller for industrial automation and control. Its built-in ROM-/DOS (MS-DOS equivalent) operating system lets the user run either standard PC language development tools. One of its two communication ports can be configured as an RS-232 or RS-485 port, depending on jumper settings. The other port is a dedicated RS-485 port, allowing the controller to function in 2-wire, multi-drop RS-485 networks. With communication speeds up to 115.2 Kbps, a real-time clock, a watchdog timer, 256 K ROM, 256 K RAM, and panel or DIN-rail mounting, this device is a flexible, powerful unit in a small package.

The ADAM-4501/4501D consists of compact-sized Ethernet-enabled communication controllers with a x86 CPU architecture. They support not only an Ethernet interface but also 4 serial ports, which makes them very suitable for industrial communication and control applications. The Ethernet-enabled features include built-in HTTP Server, FTP Server and email alarm functions. The modularized I/O design provides high flexibility for versatile application requirements. The ADAM-4501/4501D also supports rich Modbus function libraries including Modbus/RTU (Master/Slave) and Modbus/TCP (Server/Client) function libraries.

With its modular design, ADAM-4502 has all the same functionality as ADAM-4501, but provides different I/O options. The ADAM-4502 provides one Ethernet interface and 4 serial ports module, but also features 1 analog input, 1 analog output, 2 digital inputs and 2 digital outputs. This versatility allows users to implement rich interfaces for different applications.