Multi-loop controller for modular system

Eurotherm has introduced a high performance multi-loop PID control unit which has the capability to run up to eight multiple, single or compound loops.

A high performance multi-loop PID control unit from Eurotherm has the capability to run up to eight multiple, single or compound loops, considerably broadening the number of application areas for which the 2500 is suitable.

The enhanced system provides access to a range of advanced functions including PID control with auto tuning and gain scheduling. Designed to communicate with any Modbus or Profibus master, the system can be used for signal conditioning, alarm monitoring, remote data acquisition or devolved control for systems such as Eurotherm’s proprietary Visual Supervisor, PC-based Scada packages or PLCs.

Introduced early in 1999, the 2500 System uses a flexible modular ‘building block’ concept of high flexibility to bridge the gap between accurate local analogue control systems and more complex digital process control architectures. It incorporates a number of hardware and software interactions tat provide fast, accurate response times for analogue process and machine control systems.

The newest I/O controller features eight high stability PID blocks, which provide an extensive range of control strategies. Each PID block offers one-shot auto tuning to optimise control performance without the need for specialist knowledge. Every PID block may be a single PID, Cascade, Ratio or Override controller, each providing the choice of analogue, time proportioned or valve position output.

The 2500 system is now available in three base sizes, taking four, eight or 16 I/O modules each. Up to 16 bases may be daisy chained to provide acquisition and multi-loop control solutions with up to 128 loops. DIN rail mounting allows the 2500 to be located where the control action is required, minimising the cost of the cable used, as only the communications need to be taken to the User Interface. The system may also be mounted on part of the controlled machine, saving the cost of centralised control cubicles.

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