Better manufacturing has improved the performance of terminal blocks, wire and connectors. "More precise and tighter fabrication tolerances of all components ensure increased reliability of conductor secureness, especially small gauge conductors," says Mike Roknich, design engineer, c3controls (www.c3controls.com). "Advanced thermoplastic injection molding processes and capabilities enable the design and production of smaller components with thinner cross-sections to maximize device current carrying, operating voltage and insulation voltage ratings."
Materials, such as polyamide, zinc plating, stainless steel and electrolytic copper, and the ability to process those materials reliably ensures component durability to withstand the electrical, mechanical and environmental demands of industrial applications over years of continuous service, adds Roknich.
"More precise manufacturing has led to smaller housing requirements for electronics utilizing surface-mount components," explains Brian Traczyk, product manager—fieldbus & remote I/O, Pepperl+Fuchs (www.pepperl-fuchs.us). "Cabling for bus networks has improved with the introduction of exposed run cable which meets crush testing of armored cable without actually being armored. This cable is manufactured from high quality PVC to withstand mechanical hazards."
Push-in terminal blocks can reduce wiring time and operator strain, says Larry Freeland, product marketing manager, ClipLine, Phoenix Contact (www.phoenixcon.com). "The intuitive pushbutton technology requires half the insertion forces of previous terminals and doesn't require special tools," he explains. "The technology is suited for high-vibration applications. Some new products on the market provide up to five times the vibration protection required by IEC standards. Some important features to look for are a clearly defined area for termination, touch-proof actuation button and universal bridging, marking and testing accessories."
The modern I/O terminal is basically an evolved terminal block, explains Kurt Wadowick, I/O systems specialist, Beckhoff Automation (www.beckhoff.com). "The continued miniaturization of electronic components in general has led to more feature-laden terminals that can facilitate a wide range of functions," he says.
"In designing connectors for fieldbus networks where multiple devices connect to a main fieldbus trunk, it's crucial to design for modularity," says Warner Tchan, engineering supervisor, Moore Industries (www.miinet.com). "For example, modern connectors might provide electronic and fully auto-resetting spur short-circuit protection that prevents segment failure caused by single device faults, which is when any failed spur might overdraw current resulting in failure of the entire segment. Better manufacturing and design of connectors also works to eliminate common installation errors. Additional manufacturing improvements, ideal for general connector design, include diagnostic LEDs to positively indicate status of spur power."
|I/O FOR THE OUTDOORS
Outdoor PushPull I/O connector family is an IP67 solution for fiber, power and copper signal connections in telecom installations. The I/O design eliminates the need to inventory costly cable assemblies and can be used for WiMAX and LTE base stations.
Harting North America
|SOCKETS AND BLOCKS
Dinnector terminal blocks and accessories include supplementary circuit breaker terminal blocks and sockets. The blocks are available in sizes ranging ¼–10 A and terminal block sockets in 12 V and 24 V models with or without LED indicators. A new series of single and double level plug-in style terminal blocks are sold in packages with 32 blocks and four pin protectors.
|ADAPT AND TERMINATE
DB9F-to-5 screw terminal block adapter connects field wiring to DB9 connectors on USB serial adapters, Ethernet serial servers and other Sealevel RS-485 products with a DB9M connector. With standard-size DB9 connector, the adapter works with two- and four-wire RS-485 networks and can be secured to the serial port with thumbscrews to prevent accidental disconnection. The adapter is RoHS compliant.
|CABLES AND CONNECTORS
Mur series power cables in a variety of types and sizes and feature connector sizes ranging 7/8–11/8 in., as well as pole arrangements from two to 19 pins, are equipped with a standard PVC jacket and feature cable lengths up to 30 ft. An array of field wireable connections and panel receptacles take connectivity needs from the device through the wire-way and to the control panel.
|SMART I/O SLICE