General recommendations:
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use shielded cables and link their shields to the terminals provided for this (Restart shielding),
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for high-level inputs and thermocouples, the "power source + wiring" resistance must be less than 100 Ohms so that the module performance is not impaired,
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for thermowell inputs (four threads installed), each of the threads must have a resistance less than 50 Ohms, which matches a brass wire of 0.6 mm diameter2 and a maximum run, total length, of 3000 m,
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for Pt100 thermowell inputs, cabled as two wires, each of the wires must have a resistance lower than 50 mOhms (so that a measurement error due to Ohms loss in the cables is not introduced).
Wiring example for a high-level voltage and current sensor on channel 0:
(1) Using range 0.20 mA or 4.20 mA requires the recording of an external shunt of 250 Ohms – 0.1 % - 1/2 W - 25 ppm/°C, parallel on the input limits. This shunt provided with the module in the form of a batch of four, which can also be separately supplied under the reference TSX AAK2.
2 Thread Thermowell and 2 Thread Thermocouple
Wiring example for a 2 thread thermowell and a 2 thread thermocouple on channel 0:
3 and 4 Thread Thermowells
Wiring example for 3 and 4 thread thermowells on channel 0:
NOTE: The module TSX AEY 414 was not designed to interface with the three thread Pt100 probes (no compensation effect), but it is nevertheless possible to connect this type of probe according to the diagram above. The precision obtained is therefore the same as in a 2 thread installment.
