RS-485 I/O Modules: ADAM-4000 ADAM-4000 Series Applications ƒ ƒ Remote data acquisition ƒ ƒ Process monitoring ƒ ƒ Industrial process control ƒ ƒ Energy management ƒ ƒ Supervisory control ƒ ƒ Security systems ƒ ƒ Laboratory automation ƒ ƒ Building automation ƒ ƒ Product testing ƒ ƒ Direct digital control ƒ ƒ Relay control Introduction The ADAM-4000 series modules are compact, versatile sensor-to-computer interface units designed specifically for reliable operation in harsh environments. Their built-in microprocessors, encased in rugged industrial grade plastic, independently provide intelligent signal conditioning, analog I/O, digital I/O, data display and RS-485 communication. The ADAM-4000 series can be categories into three groups: controllers, communication modules, and I/O modules. General Features RS-485 The ADAM-4000 series of modules use the EIA RS-485 communication protocol, the industry’s most widely used bi-directional, balanced transmission line standard. The EIA RS-485 was specifically developed for industrial applications. It lets ADAM-4000 modules transmit and receive data at high rates over long distances. All modules use optical isolators to prevent ground loop problems and reduce damages caused by power surges. Modbus Communication Protocol Since Modbus is one of the most popular communication standards in the world, Advantech has applied it as the major communication protocol for eAutomation product development. The new-generation ADAM-4000 modules now also support the Modbus/RTU protocol as the remote data transmission mechanism. Featuring the Modbus-support capacity, the new ADAM-4000 series becomes universal remote I/O modules, which work with any Modbus systems. The HMI server or controller can read/write data via standard Modbus command instead of complex ASCII code. Watchdog Timer A watchdog timer supervisory function will automatically reset the ADAM-4000 series modules if required, which reduces the need for maintenance. It also provides great reliability to the system. Flexible Networking ADAM-4000 series modules need just two wires to communicate with their controlling host computer over a multidrop RS-485 network. Their ASCII-based command/ response protocol ensures compatibility with virtually any computer system. Modular Industrial Design You can easily mount modules on a DIN-rail, a panel or modules can piggyback on top of each other. You make signal connections through plug-in screw-terminal blocks, ensuring simple installation, modification and maintenance. Controller Features Alternative Standalone Control Solution A standalone control solution is made possible when the ADAM-4000 series modules are controlled by the ADAM-4501 or ADAM-4502 PC-based communication controller. The ADAM-4501 and ADAM-4502 allow users to download an application (written in a high-level programming language) into its Flash ROM. This allows customization for your applications. Chapter 16 Table of Contents Table of Contents