Modular distributed I/O system

Third Quarter 2004 Other technologies Access Control & Identity Management

The new FD67 distributed I/O system from Norgren, represented in South Africa by sole local suppliers Ernest Lowe Pneumatic & Hydraulic Automation Solutions, was developed for use in fieldbus systems such as DeviceNet and Profibus. This modular system simplifies the electrical installation of machines and systems, reduces installation costs, shortens commissioning cycles and facilitates fault diagnosis. The FD67 can be used in many industries, including the packaging, assembly, handling and general machine building sectors.

With a modular concept like this, the I/O layer, beginning with the fieldbus coupler, is distributed through the heart of the machine close to the sensors and actuators instead of being placed in just one spot such as the control cabinet. A single hybrid cable carries all signals and communication, resulting in shorter I/O lines and a consequent reduction in cabling, time and installation costs.

Potential problems relating to incorrect customer wiring are avoided, as a full suite of pre-wired and pre-tested cables is available to ensure minimal downtime and greater system reliability and availability. The FD67 also features a comprehensive debugging facility with single channel diagnoses and shutdown. When a problem is detected, only the affected plug position is shut down. This not only keeps the rest of the module operational, but also serves to indicate the faulty position for fast repair.

Low bus-node counts result in low node costs, further reducing overall build costs. Fully encapsulated electronics and an IP67 rating make the system not only suitable for wash-down environments but also extremely resilient to shock and vibration. System dimensions have been kept small to lessen space requirements and simplify machine design. Flexibility is optimised through the use of multifunctional I/Os - with no separate input or output modules, free parameterisation of the two signals on each plug position further reduces system costs.

Engineers can now standardise machine design around one I/O system. The machine is independent from the controls and fieldbus so, if the end-user wishes to use a different fieldbus, he simply changes the bus coupler, as the I/O periphery does not require adaptation. This allows machine builders quicker response times when constructing to individual customer specifications.

For more information contact Manny Vieira, Ernest Lowe, +27 (0) 11 898 6600, [email protected], www.elco.co.za

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