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Daisy-chained DC drives are easier to program

01 September, 2001

Daisy-chained DC drives are easier to program

Sprint Electric claims to have simplified the configuration of multiple DC drive installations by developing a technique for "daisy-chaining" several drives together so that they can be programmed and monitored simultaneously. The technique is expected to appeal, in particular, to OEMs and plant engineers who need to load the same settings and parameters onto several drives at the same time.

The drives are linked by plugging off-the-shelf RS232-to-RS486 converters into their serial ports and connecting the outputs to the input terminal of the next drive. The drive at the end of the chain is then connected to a PC running Sprint`s Windows-based configuration tool, PL Pilot. All of the drives in the chain can be programmed simultaneously, with split screens on the PC display showing the status of each drive.

The technique can be used with Sprint`s two-quadrant PL and four-quadrant PLX families of three-phase digital drives. The PLX covers the ratings range 5-225kW, while the PL is available in ratings up to 265kW.

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