Automation Fair 2003: Switched-mode power aids low-voltage applications

Milwaukee, WI—To meet the increased safety and reliability demands required for many low-voltage power supply applications, Rockwell Automation has launched its Allen-Bradley Bulletin 1606 general-purpose, switched-mode power supplies.


Milwaukee, WI— To meet the increased safety and reliability demands required for many low-voltage power supply applications, Rockwell Automation has launched its Allen-Bradley Bulletin 1606 general-purpose, switched-mode power supplies. This line of low-voltage power supplies accepts wide ranges of ac and dc input voltages, and has global approvals to meet worldwide single-phase and three-phase application requirements.

Including two families, 1606-XL standard and 1606-XLP compact, Bulletin 1606 features start-up and overload response capabilities that provide smooth electrical load distribution. The standard units are designed with a power boost that provides additional power reserves of up to 15% without any reduction in output voltage. All units feature an overload design that delivers up to 80% higher continuous current, above maximum device rating, at a reduced voltage with no negative thermal effects. This eliminates the need for designers to oversize the power supply system and minimizes potential overload damage.

When wired in parallel with an identical device, Bulletin 1606's redundant power supplies provide 1+1 redundancy with no need for additional hardware. The result is that panel designers are able to achieve greater cost efficiency because they no longer need to buy extra components to build a redundant design.

In conditions where input power is unreliable, Allen-Bradley's 1606-XLBuffer module gives panel designers an extra measure of protection against unpredictable threats, such as voltage dips or brownouts. This supplementary module accommodates input power fluctuations by allowing the control circuitry to bridge over voltage dips, and keep the system running. The buffer unit is compatible with 5 to 20 A, single-phase and three-phase supplies, and provides dc power backup for all types of ac power faults.

With the smallest reported per-watt profile in the industry, the 1606-XLP compact power supplies feature a frame size that is 50% smaller than most comparable units, while providing the same performance advantages as the standard devices. In addition, all compact power supply units are DIN-rail-mounted, and feature spring-clamp terminations that require no tools to install. This speeds installation, reduces wiring costs and provides a stable electrical connection under high vibration conditions.

Rockwell adds that its Bulletin 1606 power supplies offer efficiencies ranging from 85% to 93%, and provide cost-effective redundancy for 2.5, 5, 10, 20 and 40 A applications.

Control Engineering Daily News Desk
Jim Montague, news editor

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