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Schneider Electric is to supply automation and control equipment to DB Controls, which has been commissioned to supply automation, motor control and a Scada system for a new waste recycling plant.

DB Controls chose Schneider Electric’s equipment to enable it to offer a cost-effective Form 2 type-tested control panel.

The waste facility has been designed and installed by OKLM Recycling Technology for waste management company Cawleys.

The plant, situated in Luton, is a sorting facility for commercial and industrial waste and features the automated separation of paper from this type of waste.

Operating as a subcontractor to OKLM, DB Controls was responsible for system integration.

For the control systems, the Schneider Electric M340 PLC platform was chosen; this compact solution offers plug-and-play options with other Schneider Electric devices.

The PLC features twin Ethernet ports programmed with Unity Pro IEC 61131-3-compliant software.

Although small in size, this PLC controls 80 Tesys Model U direct online integrated motor starters, 18 ATV71 variable-speed drives and four racks of Advantys fieldbus input/output (I/O) with Telefast 2 direct termination units.

The Tesys U DOL starters can be installed in a compact space resulting in a reduced footprint and work in conjunction with VSDs and remote I/O that are all networked using Modbus over TCP.

This package of equipment has been built into a Prisma Plus motor control centre (MCC), a BSEN 61439-2-compliant offer based on a Prisma Plus distribution switchboard and designed to be fully integrated with Schneider Electric distribution, control and automation products.

The recycling plant is designed using a complex arrangement of conveyors to transport waste from stage to stage, recovering different types of recyclable material at each phase.

The MCC’s inverter drives ensure that the motors powering the conveyor system run at the correct speed, even though the loading may be continuously changing.

The separation process uses a range of technologies, including infrared, magnetic and sorting, by blowers in a large rotating drum.

The plant runs continuously and requires constant monitoring to ensure the safety of workers and the protection of the machinery should abnormal items get onto the conveyor system or if blockages occur.

Ensuring safe and reliable plant operation is the primary function of the Scada system.

For DB Controls, there were cost and efficiency advantages in using Schneider Electric components.

David Trueman, sales director of DB Controls, said: ‘Being able to purchase all of the equipment from one source meant that the integration of the various components was very straightforward, particularly with the model used by Schneider Electric for network production.

‘By building the MCC in this way, we were able to offer a fully verified solution.

‘One of the key benefits of working with them [Schneider Electric] has been the ability to use Ethernet networks in control applications,’ he added.

In operation, the M340 and the ATV71 both have an active webpage, accessed through the system software, to open up windows on the Scada display to show device parameters and status.

The system is fully accessible remotely at DB Controls’ engineering office.

Now fully operational at Cawleys’ Luton plant, the control system has also been replicated at two further waste recycling facilities.

Schneider Electric

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