Terminals define the point where device or component conductors come to an end. They can be as simple as the end of a conducting wire, or they may have some sort of connector or fastener attached. Terminals form the electrical interface with external circuits at their endpoint, and in industrial automation are most commonly found as terminal blocks.
These modular, insulated blocks may terminate or join together two or more electrical conductors, and are the simplest way to connect these to the ground, a mains power source, switch or other outlet. In their most basic form, they're just a long strip of individual terminals joined together. Modern industrial applications are now very advanced technologically, and today's terminal blocks are often required to carry both electrical, electronic and ethernet connections, especially where fully automated equipment is governed by a communications network and PLC.
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At Rowse Automation we stock a full range of terminals, terminal blocks and accessories. These include simple feed-through terminals for connecting a single input wire to a single output wire, up to multiple layer, rail-mounted blocks in two, three and four-tier configurations. Many different types of connection are available, including screw-in terminals, spring clamp connections and push-in plugs.
Terminal blocks are often grouped according to the type of device they serve. These can include blocks for connecting thermocouples to provide an accurate temperature measurement, and I/O blocks for a specific device that provide a direct communication to its control unit. Sensor/actuator terminal blocks handle devices such as proximity or photoelectric sensors with several component wires, while other, simpler blocks form the termination point for power cables.
Designated disconnect blocks, sometimes called switch blocks, can easily disconnect an electrical circuit with a knife or blade switch, allowing the wires to remain in place. Terminal blocks can be designed for built-in safety, such as easily interchangeable ground circuit terminal blocks, for grounding components or electrical systems. Fuse holder blocks are designed to connect together various different fuses from a collection of devices, so as to contain any possible short circuits within the block.
Terminal blocks are available with through and through connectors, feed-through connectors or distribution blocks, and are offered with or without a blown fuse indicator. We supply a variety of male and female plugs and sockets, polarity sockets and multi-circuit plugs, as well as isolated ferrules. We can provide mounting kits and disconnect options including a sliding version, knife or blade switches, and a decoupling interface. There are also circuit separators, mini-blocks and miniature fuse connectors. We can supply pins, fuses, fuse plugs, trip plugs, plug housings, voltage sockets and insulation stops.
Rowse Automation stocks various jumper bars, step-down jumpers, staggered jumpers and cross-spacing jumpers, plus intermediate and end plates, separator plates and protective covers. We supply device markers, blank or pre-printed terminal block markers, shield connectors and test plugs and adapters. ATEX-rated terminal blocks are also available for use in various hazardous environments, and terminal blocks can be supplied with diodes or LED modules, ring lugs, studs, or pull tabs.