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Electrical/Electronics

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By Rick DeMeis, Senior Editor -- Design News, January 8, 2001

Connectors

Wire nut connectors feature a no-slip spring insert that creates a secure connection. The insert threads the wires after an assembler inserts them, so pre-twisting is not necessary. The wing nuts withstand gasolines, oils, alkalines, and acids. Their polypropylene shells are color coded by wire size range.

Nelco Products Inc., 22 Riverside Dr., Pembroke, MA 02359; FAX (781) 826-7344; www.nelcoproducts.com.

For Information, enter 653

Filter

Flex-Frame air filters can bend around jutting components and other obstacles in small electronics enclosures. The flame-retardant, polypropylene frame comes in thicknesses ranging from 0.03 to 0.12 inch for varying degrees of rigidity.

Universal Air Filter Co., 1624 Sauget Industrial Pkwy., Sauget, IL 62206; FAX (618) 271-8808; www.uaf.com.

For Information, enter 654

Relay

Equipped with an RS-485 port that is Modbus compatible, the Motor Logic Plus™solid-state overload relay can provide motor protection and diagnostics as a stand-alone device or over a network. Users can network up to 100 relays, and program and control them remotely via a PC. The relay protects motors from high voltage, low voltage, voltage unbalance, current unbalance, phase reversal, rapid cycling, and other hazards.

Square D, 1415 S. Roselle Rd., Palatine, IL 60067; FAX (847) 925-7271; www. SquareD.com.

For Information, enter 655

Interface card

The BU-65565 MIL-STD-1553 PMC card provides a hardware and software interface between an embedded system with a PCI bus and one or more 1553 buses. Cards include one to four dual redundant 1553 channels and a 32-bit, 33-MHz PCI interface that operates at 3.3 or 5V.

Data Device Corp., 105 Wilbur Pl., Bohemia, NY 11716-2482; FAX (631) 567-7358; www.ddc-web.com.

For Information, enter 656

D/A converters

Triple D/A converters are available with 8- or 10-bit resolution and operate at 100, 150, or 200 MHz to provide high-quality analog RGB and video output. Features include powerdown control to conserve battery power, double-buffered digital inputs for low distortion, and a bandgap voltage reference.

Fairchild Semiconductor, 1322 Crossman Ave., Sunnyvale, CA 94089; FAX (408) 822-2104; www.fairchildsemi.com.

For Information, enter 657

T coupler

The BusQuick™T-Coupler I/O system provides RFI/EMI protection and speeds installation of Fieldbus cabling compared with screw terminal technology. To make a 3-way connection, a user inserts each cable into one of the device's connecting ports then twists the central contacting element. The system has a class IP 67 rating and operates from -25 to 85C.

Hirschmann, 30 Hook Mountain Rd., Pine Brook, NJ 07058; FAX (973) 830-1470; www.hirschmann-usa.com.

For Information, enter 658

Sensors

CR7310 series sensors detect ground fault currents of 10 mA to 100A in single- and multiple-phase electrical systems running from 120 or 240V ac. When ground current reaches the adjustable trip-point level, the sensor's electromechanical relay energizes, illuminates the tripped LED, and provides an output signal. The devices are rated UL 1053-Class 1.

CR Magnetics, 544 Axminister Dr., Fenton, MO 63026; FAX (314) 343-5119; www.crmagnetics.com.

For Information,enter 659

A/D converter

Designed as a 2-chip set to minimize mixed-signal crosstalk and noise, an 18-bit dual-slope integrating A/D converter draws 28µA. The ALD500R analog chip performs dual-slope integration and includes a precision voltage reference. The ALD521D microprocessor provides the necessary control and handshake functions for outputting a 24-bit serial binary data word. Applications include PC-based digital panel meters, laboratory datalogging, process monitors, and calibration systems.

Advanced Linear Devices, 415 Tasman Dr., Sunnyvale, CA 94089-1706; FAX (408) 747-1286; www.aldinc.com.

For Information,enter 660

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