The 2500 Series™ PLC system is a 100% compatible replacement for the former Simatic® 505 PLC system, and includes state-of-the-art enhancements in functionality and performance. Products in the family include controllers, power supplies, bases, remote base controllers, analog and digital I/O, Ethernet TCP/IP, Modbus, DeviceNet networking modules and specialty I/O modules.

CTI 2500 Series™ products are installed in the plants of major industrial companies throughout the world. CTI is continuing a heavy development investment in this system, with plans for enhancements in the instruction set, programming tools, network connectivity, and I/O system. A micro-PLC family based on the same technology, and a line of compatible networked I/O are included in the long-term product roadmap.

The 2500 Series™ Programmable Controller System is designed for use in a broad range of applications, including those that require discrete and analog control. Components include the CPU and the support devices that provide operator interface, communication, I/O control, and power. These systems perform the same functions as relays, static control, or card logic control systems. They can detect the change in state of input signals from such devices as pushbuttons, limit switches, and analog sensors. Acting on this information and executing a relay ladder logic (RLL) program stored in memory, the CPU produces output signals to drive motor starters, solenoids, pilot lights, modulating control valves, etc. These signals are used to regulate the operation of various pieces of equipment. A full line of discrete, analog, word and intelligent I/O modules are available for handling almost any input or output specification. These I/O modules are rugged, plug-in devices capable of functioning within operating specifications in harsh environments.