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 | the task temperature, strain or force, and position are parameters which must be measured in virtually all areas of industry. they are often used as reference input for control or monitoring systems, safety shutdown systems, or for similar critical jobs. here, normally the highest demands are placed on accuracy, flexibility, and functional safety as well as electrical safety. different sensors are used depending on the measuring task. these sensors provide a raw signal which is prepared, linearized if required, and standardized for further processing using a transmitter. the problem there is a very wide range of standardized and commercial sensors for the detection of temperature, strain or force, and position. the large number of sensors, connection variants, individual measurement ranges, different supply voltages, and required output signals call for very variable transmitters that can be optimally suited to the different conditions. however, the required flexibility should not be paid for with complex operation. rather, it is desirable that adjustments can easily be made on the site. high performance should not result in increased susceptibility - high reliability and availability are key requirements. the solution the polytrans® p 32000 universal transmitters provide connection possibilities for all standard thermocouples, resistance thermometers, strain gage sensors, resistors, and potentiometers/resistive sensors. they can be flexibly adapted to the respective measuring task using dip and rotary decoding switches or via an irda® interface. the broad-range power supply covers all common supply voltages from 24 to 230 v and ensures maximum safety even with instable mains supplies. 3-port isolation with safe isolation up to 300 v ac/dc according to en 61140 ensures optimum protection of personnel and equipment as well as unaltered transmission of measuring signals. the polytrans® p 32000 offer maximum performance in the smallest of spaces. resistance thermometers can be operated either in 2-, 3-, or 4-wire configuration. the configuration type is automatically recognized, adjustment is not required. all commercial thermocouples can be detected with internal or external reference junction compensation. to detect mechanical quantities such as force or strain, strain gages can be connected in full-bridge configuration. the possibility to connect variable resistors and potentiometers cr-eates a wide range of application possibilities, for example, in the field of displacement or position detection. input voltage signals up to +/- 1000 mv are converted into 0/4 to 20 ma or 0 to 10 v standard signals. this enables low-cost implementation of current measurements using shunt resistors, for example. the devices meet the requirements of type of protection "n". this means they can be installed and used in zone 2 hazardous areas in the ec, the usa, and in canada. thanks to their approval to class 1, division 2 (ul 1604), they can also be used according to the traditional north american classification system. knick offers the polytrans® p 32000 transmitter with sil approval for applications with high demands on functional safety. the requirements of en 61508 were implemented by a specially developed hardware and software. the fail-safe concept makes use of structural measures at the device level (redundancy of system components) and diagnostics methods for se-lective fault detection. the product is sil 2 approved (en 61508) by an authorized body (tüv rheinland). operating software the user-friendly, menu-guided paraly® sw 111 communication software runs on standard and pocket pcs and opens a number of further options such as access to further sensor types, input of customer-specific linearization curves, readout of the connection configuration, as well as the use of extensive diagnostic functions. configuration, documentation and, if necessary, maintenance of entire plant components can be accomplished by "infrared remote control". moreover, the output current or voltage can be specified independently of the input value using the simulation function - a useful feature for plant commissioning or revision. the housing the modular housing - 6 mm - is stingy with enclosure space and allows high component density. din rail bus connectors in-serted in the mounting rail facilitate the power supply connection if necessary. |
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