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Signal Convertor Isolator Modules

Signal Convertor Isolator Modules


Product Specification :
Model wise descriptions :

Model Products Description Size w x h x d (mm.)
ISM-10 Single input & Single output  with 110-230 VAC supply 45 x 75 x 100
ISM-10-X Single input & Multi output (X = 2, 3 or 4) 45 x75 x 100
ISM-12 Single input & Single output with 24VDC supply 22 x 75 x 100
ISM-12-2 Single input & Two outputs with 24 VDC supply 22 x75 x 100
ISM-12-X Single input & Multi output (X = 2, 3 or 4) with 24 VDC supply 45 x75 x 100

Description :

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.

These modules operate on 230 VAC or 110 VAC supply or 24VDC. The module with single input and multiple parallel outputs (Model ISM-10-X and ISM-12-X) can also be provided to meet the process control requirement requiring simultaneous change of 2 to 4 outputs proportional to the single input variation. These modules are rugged, reliable, field proven and economically priced. These modules operate on 230 VAC or 110 VAC supply or 24VDC. The module with single input and multiple parallel outputs (Model ISM-10-X and ISM-12-X) can also be provided to meet the process control requirement requiring simultaneous change of 2 to 4 outputs proportional to the single input variation. These modules are rugged, reliable, field proven and economically priced.

 

Features :

• Accepts AC/DC signal inputs and provides optically/galvanically isolated proportional analogue output.
• On site calibration facility-using ZERO/SPAN presets.
• Operates on 230VAC/110VAC or 24VDC.


Applications :

• Interface of low-level signals coming from the sensors or transducers from the plant to DCS, SCADA, PLC or PID process controllers without ground
• line interferences.
• Signal multiplier – single input and 2 to 4 outputs

Technical specifications :

Input 1) DC input - RTD (Pt-100) / 2 or 3 wire or Thermocouple (Type to be specified), or mV, mA input or Load cell, pressure sensor, pH/ORP sensor etc. generating DC current or voltage.
2) AC input - Current (through external CT) (0-1)A or (0-5)A or Voltage (0-110)VAC or (0-230)VAC.
3) Frequency input DC levels of clock pulses of max. 10KHZ. @ (12-24)VDC
Range

User 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 Outputs Maximum 4 parallel independent outputs can be provided for single input. Each output can be of different signal type.
Accuracy For Thermocouple and RTD Input, the calibration of output is done for the best straight line fit to give accuracy of +/- 0.5% to +/-1% of the range. For other input the linearity depends on the input signal, where output accuracy is absolute to the input.
Cold junction Compensation

Automatic for Thermocouple Input.

Calibration On site calibration facility through ZERO and SPAN presets accessible to the user.
Isolation Input and Output are optically isolated for DC inputs and galvanically isolated for the AC inputs. Power supply is also isolated from Input and Output.

 

Isolation Voltage Greater than 2KV.
Mounting

35-mm. DIN rail mounting ABS enclosure.

Supply AC Supply : 90-240VAC, 50/60Hz or
DC Supply : 24VDC +/- 10%.
Size  As given in the table.

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