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Process Indicator / Transmitter in FLP Enclosure

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Libratherm offers micro-controller based Process Transmitter model FTX-3000 in flame proof field mountenclosure, for measuring and indicating process parameters such as temperature, pressure, humidity, level etc..and converting to the equivalent analogue and digital values proportional to the Process Input for long distance transmission and interface to the PLC or DCS or any other field device. FTX-3000 is a very useful device to capture the low level signal from the hazardous area and bringing back the signal to the main control room.
For process input type selection, four options are available as given in the above table. Temperature or Process values corresponding to the input is indicated on the digital display and the corresponding display range is converted to the 2 wire current output of 4-20mA/0-10VDC proportional and linearized to the selected process input. This linearized signal can be used for remote measurement and indication. For the dual input model FTX-3000-U-2 or FTX-3000-F-2, two independent 4-20mA/0-10V signals are available. The analog outputs are isolated from the DC power supply. Single FTX-3000 can be used to capture two process inputs, thereby saves on size and price.
To interface low level field signals with PLC or DCS or with any other process controller – the measured and displayed analog values are converted for digital serial communication on isolated RS485 bus with MODBUS RTU protocol in slave mode.
Advantage of RS485 interface: Providing the feature of RS 485 digital serial interface is advantageous, since the number of wires coming from the various sensors / transmitters can be avoided and instead, only two wires can be used to interface multiple such FTX-3000 on serial port. The digital communication has the greatest advantage of exactly replicating the process value, that is what is measured at the plant and what is displayed in the control room always matches one to one as compared to transmitting the analogue values. In today’s technology, most of the PLCs and DCS accepts RS485 digital interface.
Features:

  • Microcontroller based design.
  • Universal single or dual industrial process input (user selectable).
  • Isolated dual 4-20mA output, proportional and linearized to the selected input.
  • RS-485 MODBUS RTU serial interface.
  • Bright red LED display.
  • IP 65 Flameproof Enclosure – suitable for Gas group I, IIA and IIB.

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