Libratherm Instruments Pvt. Ltd.
Libratherm Instruments Pvt. Ltd.
Dahisar East, Mumbai, Maharashtra

Signal Isolators

Libratherm offers AC / DC Signal Convertor cum Isolator (Model: ISM-10), designed in 35 mm. DIN Rail compatible modules. These modules accepts AC/DC input signal and provides optically / galvanically isolated output in the form of (4-20)mA or (0-5)V or (0-10)V proportional to the input signal. Both the input and output levels have their grounds optically / galvanically isolated. Thus the process signals received from the Transducers or transmitters or Sensors can be directly connected through ISM-10 to the PLC, DCS or to any other electronics in the process industry accepting such signals, without any signal loss or ground line interference. The ZERO and SPAN presets are accessible to the user for on site calibration and matching.

DIN Rail Modules Signal Isolator & Converter

DIN Rail Modules Signal Isolator & Converter
  • DIN Rail Modules Signal Isolator & Converter
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Product Details:

Mounting TypeHorizontal
Power Supply12-24 VDC

With maximum, 4 parallel independent outputs signal isolator and converter din rail modules can provide single input.


DesignBased on F/V and V/F linear circuit.
Input typesDC input - RTD (Pt-100) / 2 or 3 wire or Thermocouple (All Types – type to be specified) or mV, mA input or Load cell, pressure sensor, pH/ORP sensor etc. generating DC current or voltage. AC input - Current (through external CT) (0-1)A or (0-5)A or Voltage (0-110)VAC or (0-230)VAC or 415VAC Frequency input DC levels of clock pulses of max. 10KHZ. @ (12-24)VDC
RangeUser may specify the required temperature range (for RTD or T/C input). For other inputs, the required calibration range can be specified.
Output(4-20) mA, (0-20) mA, (0-1) VDC, (0-5) VDC, (0-10) VDC, Frequency (0-1)KHz, (0-5)KHz, (0-10)KHz etc. proportional to the specified input range. For current output, RL (max.) = 500 Ohms. For voltage output, RL (min) = 10K Ohms.
No. of OutputsMaximum 4 parallel independent outputs can be provided for single input.
AccuracyFor Thermocouple and RTD Input, the calibration of output is done for the best straight line fit to give an accuracy of +/- 0.5% of the range. For other input, the linearity depends on the input signal, where output accuracy is absolute to the input.
CalibrationOn-site calibration facility through ZERO and SPAN presets accessible to the user.
IsolationInput and Output are optically isolated for DC and frequency inputs and galvanically isolated for the AC inputs.
Isolation VoltageGreater than 2KV.
Mounting35-mm. DIN rail mounting ABS enclosure.
Supply90 -260 VAC, 50/60Hz or 24VDC @ 200mA
Size65(W) x 80(H) x 125(D) mm.
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Kamlesh Panchal (CEO)
No. 401-403, Diamond Industrial Estate, Ketki Pada Road Dahisar East
Mumbai- 400068, Maharashtra, India

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