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WNIP JUL AUG 19.4 Digital

WNIP JUL AUG 19.4 Digital

28 19.4

28 19.4 Stationary* Battery Basics: Jars & Straps There is so much terminology related to stationary batteries and it’s hard to know what everything means. So, what’s the difference is between jars and straps? What is a jar? A stationary battery jar is the container that holds the cell or group of cells and electrolyte. It is also commonly referred to as a battery case or cell case. Jars are typically made out of some kind of thermoplastic substance. However, hard rubber is sometimes used as well. If the battery contains nickel-cadmium cells, the jar may even be made out of steel. Vented lead-acid batteries normally have transparent jars to allow for plate and sediment inspection. What is a strap? A stationary battery strap is the component in a cell that joins plates of like polarity in parallel. It is an electrical conductor that is made of copper. It typically has a lead or tin plating for leadacid cells. Nickel-cadmium cells require a different connector. They are typically made with nickel-, cadmium-, or tin-plated copper, or even steel bar. Occasionally, the strap may be insulated copper wire or lead (with or without a copper insert) for lead-acid batteries, depending on the manufacturer’s specifications. *Stationary batteries Transportation batteries function as start/stop batteries. The primary discharge occurs when the vehicle is started. After that, it spends the rest of the drive time recharging. Motive power batteries do not operate this way. Instead of only being used to start the machinery, there is a continual discharge. Stationary batteries are used constantly while in operation and used until depleted, or until the job is done, and then recharged after use. Midtronics electrical system testing technology is used by six major automotive manufacturing facilities in South Africa in onvehicle equipment, recording events that may lead to battery or electrical system failure. In addition to this, two leading South African battery manufacturers and distributors have committed to using the Midtronics technology in their facilities and distribution outlets. sales@comtest.co.za Solution for monitoring and controlling large-scale photovoltaics systems The Array Control switchgear and controlgear assembly helps system operators and planners to implement efficient park management for large-scale photovoltaic systems. A solar system consists of a variety of string combiner boxes, inverters, and additional monitoring components such as reference sensors, weather Universal process indicator stations or energy meters. In order to manage the accumulated data volume, the photovoltaic park is divided into individual segments called arrays. The switchgear and controlgear assembly receives the measuring data in an array according to a uniform data model and forwards these to a central control room. Preprogrammed function blocks simplify the connection of individual components to the Array Control. In the event of a network overload, the inverter is controlled, in order to reduce the power. Furthermore, the solution takes on numerous diagnostic functions, e.g., in the event of a drop in performance in a string. patrickr@phoenixcontact.co.za The LT1200 panel mount process indicator is a precision digital indicator for interfacing to and measuring most process variables. The LT1200 is capable of measuring and processing variables such as mA, volts, potentiometers, frequency, counting and also has built in functions such as an event timer, real time clock (RTC option required) and a manual analog output station (analog output option required). The LT1200 also includes a multiple output excitation voltage selection for sensor excitation of 2 or 7 wire transmitters, encoders, potentiometers and many more. Calibration of the analog process variables is simply done by either entering in the display range selection or by direct sensor injection calibration. The high bright 6-digit 14 segment LED displays make for easy setup and readability. A simple menu system with built in help hints allows for easy configuration of display and sensor settings. A universal mains switch mode power supply (85-264VAC) is provided as standard but an optional low voltage (10-70VDC) isolated power supply or a high voltage (25-70VDC) isolated power supply can be installed. RS272 communications is supplied as standard with the MODBUS RTU and MODBUS ASCII protocol. A simple ASCII out protocol is also provided for serial printing and communicating to large displays. A second communication RS485 interface can be added in conjunction with the standard RS272 interface. The LT1200 also has an analog out or an isolated analog out option to generate a precision 0/4- 20mA and 0-10V analog output signal. The LT1200 also includes advanced features such as user input linearisation, max/min recording, programmable front push buttons, programmable digital inputs, security menu lockout, advanced digital filtering, plus many more to provide a truly universal process indicator. glen@loadtech.co.za

29 19.4 All-in-one PLC + HMI + I/O The Unitronics Vision controller series welcomes its newest member – the Vision470. The wide 4.7” built-in colour touchscreen brings added value to any application that requires a compact PLC controller with onboard I/O’s. A flat fascia with an IP66/ IP65/NEMA4X rating houses the touchscreen and function keys. Each Vision470 model offers a unique on-board I/O configuration that can include digital, high-speed, and analog I/O’s, including PT100 / thermocouple and weight / pressure measurement. Expansion modules enable local and remote I/O at distances of up to 1000m, making Vision470 a cost-effective solution for applications up to 512 I/O’s. Power features include 24 auto-tuned PID loops to control temperature, level and pressure. Time-based and immediate interrupt support make the controller a natural for rapid response applications such as packaging machines. Built-in recipe capabilities are supported by data tables, which store the parameters required to control a specific process. Data tables also enable the Humidity probe for tough processes controller to store data logs to micro-SD card, which also stores application back-ups and allows complete PLC cloning. Communication options include Ethernet, cellular and industrial protocols such as Modbus, DF1 Slave, BACnet, J1979 and CANopen. In addition the protocol utility allows Vision470 to communicate via almost any ASCII protocol. The unit is directly accessible via mini-USB programming port and remotely accessed using GPRS/GSM/CDMA and other IP networks for data acquisition and program download. Another major benefit is the ability to notify supervisors of critical information via e-mail and SMS, enabling real-time remote management. The machine operator communicates directly with the application via the resistive analog touchscreen or remotely, via the free Remote Operator utility – which displays data, colour trend graphs and attention grabbing alarm screens. Display options are almost endless, with more than 1024 user-designed screen supported by 12MB of memory for images and 1MB for fonts. OEMs and machine builders profit from intuitive, all-in-one VisiLogic software that enable rapid hardware configuration, PLC and HMI application programming. VisiLogic includes a full library of drag-and-drop function blocks for complex automation and control tasks, such as PID, and a rich library of colour industrial images. info@visionautomation.co.za The new HygroSmart HS7 probe has designed to withstand the kind of harsh and demanding conditions found in industrial processes. Unlike many ‘disposable’ probes that have a short life within harsh conditions before needing to be replaced, the HygroSmart HS7 sensor has a polymer tile to give longterm reliable measurements. In addition, it also has an accuracy of 0.8%RH, making it among the most accurate and reliable RH probes on the market, as well as allowing for longer recalibration periods. This not only gives peace of mind to process operators, but also provides a low life-time cost of ownership when compared to the disposable probes. The HygroSmart HS7 consists of a solid, corrosion-resistant probe body with an interchangeable sensor. When recalibration is due, the old HygroSmart HS7 sensor is simply exchanged for a new, freshly calibrated one. This simple procedure takes only a few seconds to carry out with the probe itself remaining installed. Replacing just the sensor, rather than the whole probe, is not only quick and simple, it also saves users money over the lifetime of the probe. In most industrial applications, RH probes have to withstand vibration, exposure to water, occasional heavy shocks and high levels of electrical interference. The HygroSmart HS7 body is designed to cope with all these environmental factors. As well as the solid body, the probe also has a 10bar pressure rating, rfi/emc electrical noise approvals and IP67 ingress protection rating. As well as its ability to withstand harsh process conditions, the HygroSmart HS7 probe also gives control to the user, as it is 100% configurable. This gives users the ability to alter their RH and temperature measurements to keep step with changes or developments in their process, with no extra cost. sales@instrotech.co.za PORT ELIZABETH - 30 AUGUST 2016 VANDERBIJLPARK - 27 OCTOBER 2016 To book a stand contact Roxanne roxannewnip@mweb.co.za or 0861 776 237 See You There! Register online: www.whatsnewinprocessing.co.za FREE ENTRANCE!

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