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| Minimum Order Quantity | 1 Number |
| Application | Wireless |
| Power Supply | 24 VDC |
| Material | Stainless Steel |
| Color | White |
Why Wireless I/O?
Many companies have geographically scattered assets, so they need sensor data at a central point. In the past, the only available option included digging trenches or running conduit and pulling wire to acquire the signals. Today, many wireless I/O applications offer simple, cost-effective measurement of monitoring points to eliminate manually collecting field data, thereby improving labor productivity.
In more sophisticated applications, wireless I/O enables users to extract full diagnostic data and predictive intel-ligence from the devices that will automatically notify the appropriate personnel of the precise problem before a costly asset, unit or plant shutdown occurs.
Foundation of Wireless I/O and I/O Expansion
The foundation of wireless I/O and I/O expansion is license-free 900MHz spread spectrum radio technology designed specifically for integration into remote assets and SCADA systems. This technology has been used reliably in field automation for almost 20 years.
Frequency Hopping Spread Spectrum (FHSS) uses pseudo-random hopping patterns that are proprietary to the radio manufacturer, making industrial FHSS radios inherently secure and less prone to interference. This makes FHSS the preferable choice for industrial wireless I/O applications, such as simple analog and digital signals.
Advantages Compared to Wired Options:
In addition to the labor and material costs associated with hard-wiring instrumentation, one of the other advantages is deployment speed. Wired systems can take days or weeks to be installed, isolated and commis-sioned. Wireless I/O networks generally require only the end points to be installed an`d configured, saving substantial time for projects with aggressive schedules.
In the event of a communication failure, communi-cation link alarms let the user know if a loss of signal between an I/O slave and the I/O master is halting data transfer from the instrument. The I/O slave will control its outputs based on the fail-safe default condition that was pre-programmed in the radio during system configuration.
Wireless I/O Expansion
Scalability is the next biggest advantage of wireless I/O compared to hard-wired alternatives. Some I/O expansion solutions allow users to expand their wireless I/O capabil-ity by adding expansion modules.
Each expansion module allows for 12 additional I/O points. Up to 15 modules can be stacked and snapped onto a base radio module. This allows for a scalable solution of up to 192 I/O points per remote location via Modbus from the master radio into the PLC. Each I/O slave is given a unique Modbus device ID, and the PLC is configured to poll Modbus registers of the specific Mod-bus address for each slave device.
Wired I/O Expansion
While the I/O expansion module offers great utility when stacked on a radio module, it also can be deployed without a radio on an I/O expansion base module. This is useful for applications in which the PLC has limited I/O capacity.
The expansion stack starts with a PC module directly connected to the PLC via the serial port. It’s Modbus addressable, as is the radio module. Users can add more I/O expansion modules to meet the I/O count required for the application. This offers a cost-effective, scalable solution for bringing in additional I/O points to the controller system with minimal programming and setup.
Reliability
Wireless systems must be just as reliable as traditional copper wire. Corrupted data can result in anything from a disruptive glitch to a devastating failure.
To identify and ultimately maximize signal reliability, users should perform a radio-frequency (RF) site survey or path study. Also, use a comprehensive software package that will allow for system configuration and diagnostic monitoring of signal reliability
Ozone as a cooling tower biocide is not only environmentally beneficial, it also brings a significant number of other benefits. The circulating water of cooling tower systems has always been an ideal place for growth of microorganisms. The warm temperature of the water and the addition of nutrients from the scrubbed air flowing through the tower provide a virtual nirvana for all sorts of microbes and algae.
Ozone is a practical oxidizing biocide because it is the fastest acting and the most efficient oxidizing agent against all microbiological organisms - when properly applied, ozone will kill all viruses, bacterium, cysts, and algal species. And, any ozone not consumed as a biocide naturally decays to oxygen, making ozonation the preferred choice for biological control of many cooling tower systems. Field tests have demonstrated that the use of ozone in place of chemical treatment can reduce the need for blowdown, and, in some cases where make-up water and ambient air are relatively clean, can eliminate it. As a result, cost savings accrue from decreased chemical and water use requirements and from a reduction of wastewater volume. There are also environmental benefits as fewer chlorine or chlorinated compounds and other chemicals are discharged.
There is also a belief within the industry (and some evidence) that under certain conditions ozone acts as a descaling agent. The premise is that ozone oxidizes the biofilm that serves as a binding agent adhering scale to heat exchange surfaces. When scale buildup on condenser tubes is reduced, higher heat transfer rates are achieved. Increasing the condenser heat transfer rate will reduce the chiller head pressure, which then allows the chiller to operate more efficiently and consume less energy. Biological growth, scaling, and corrosion are the main maintenance concerns with these cooling towers.
Benefits Of Ozone Over Conventional Method :
- Will not load any substance in water unlike chlorine which builds up the TDS till the cooling power is lost.
- Virtually eliminate the necessity for the blowdown.
- Saves you from the 'who-pollutes-pay tax' which is becoming standard worldwide (people are made to pay according to the load they dump even in the permitted drains)
- Makes the water crystal clear, eliminating all turbidity.
- Removes all bacteria, including the dreaded 'Legionella'.
- Costs almost nothing, once installed. Just a little power
- Dissolves the scale and inhibits further scaling, hence improving heat transfer and further saving on chemicals and pollution.
- Decreases the corrosion by 50% (acts by passivation like chromates which are used as corrosion inhibitors, but dangerous)
- Removes froth and does not generate further froth.
- Brings the bacteria countdown to below 1000CFU/ml compared to 105 to 107 for chlorine
- Makes you free from the s of chemicals and maintenance personnel as well.
- Reduced Chemical Usage-Chlorine can substitute for several chemicals in a cooling tower treatment package, reducing and possibly eliminating the use of such chemicals.
- Increases dramatically Heat Transfer Efficiency.
- Repays for its capital cost in 6 to 18 months.
- After this, it adds good money to the bottom line of your clients, balance sheet
Additional Information:
Minimum Order Quantity : 1 Piece- 1