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New multi-featured counter module adds flexible counting capability to CPX systems

New multi-featured counter module adds flexible counting capability to CPX systems Festo introduces the latest addition to its well-established CPX Modular Automation Platform, the CPX-2ZE2DA-PI Counter Module. System builders can now incorporate counting capability simply by plugging a CPX Counter Module directly into their CPX system; this eliminates the need for an external counter and the associated costs it would present in terms of hardware and software integration effort, space requirement, cabling and installation time.

Once installed, the Counter Module's high I/O, operational mode and parameterization flexibility allows engineers and machine builders to set up sophisticated counting applications with minimal effort. These can be implemented directly on the CPX system with a wide range of plant sensors and actuators far more rapidly than was previously possible.

Festo's CPX platform is a complete automation solution that integrates a wide choice of pneumatic and electrical, analogue and digital I/O. CPX systems configured for specific requirements are delivered pre-built, tested and ready for installation, enabling system integrators to meet tight timeframes and budgets. For additional flexibility, the CPX platform can operate as either a self-contained industrial PLC, or as a local unit on a Fieldbus or Industrial Ethernet-based distributed system. In addition, a wide choice of I/O and connector modules makes interfacing to process sensors and actuators easy.

The CPX Counter Module has two channels, allowing compact and cost-effective solutions for applications with multiple sensors. Each channel accepts most 24 V and 5 V pulse and single-ended or differential incremental encoders, as well as SSI absolute types; this facilitates a wide range of length, position, speed and angular position measurement applications. A direction signal, or 90˚ phase shift inputs, on each channel allow extraction of direction information for incremental encoders. Count continuously, count once and periodic count modes at 24 V and 5 V levels are supported with pulse count frequencies to 1 MHz.

Output functions are also well supported; these include configurable 24 V digital, pulse, pulse train, pulse-width modulation (PWM), On/Off control with delay and frequency output to 20 kHz. In addition, by pairing the Counter channels 24 V DC motors can be controlled._The Counter Module has features to improve the quality of its results. These include hysteresis to overcome encoder fluctuations, and limit monitoring and diagnostics. For ease of use and added flexibility, parameterisation of each channel for its input and output connections and functionality can be managed via a laptop using Festo's free to download FMT software, as are commissioning and diagnostics.

IP-rated CPX systems using the Counter Module can be mounted directly onto the machine being controlled rather than relegated to a cabinet, as the module can achieve IP65-rated ingress protection with an optional cover. This allows engineers to design more compact, reliable and cost-effective systems with reduced cabling requirements. The module features Festo's new push-in connection technology, which makes connection to the counters' inputs and outputs quick and easy.

The Counter Module is designed for applications within the packaging, drive engineering, process, food and drink, mechanical engineering and other industries. One example concerns rotary or in-line filling machines of up to 18 nozzles each with flowmeters for accurate volume dispensing. The Counter Module counts the flowmeter pulses and controls outputs to the nozzle shut-off valves. Other examples include fast, bus- and control-independent reactions for controlling fast-switching valves, valve opening times and direction changing for fast drives, and pulse-width modulation control for thermostat temperature settings, drive speed and lamp brightness.

"These Counter Modules add an easily-installed, compact and highly functional counting capability to CPX systems," comments Jacqui Hanbury, Product Manager at Festo GB. "In line with the CPX's Functional Integration philosophy, the modules connect directly to encoders without need for A/D converters and associated wiring. Parameterisation is also performed simply and quickly. Overall, this means that CPX users in a wide variety of applications can start benefiting from the Counter Module's considerable flexibility with minimal disruption or delay."
 

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