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Применения > > Channel-to-Channel Isolated Temperature Input (Thermocouple/RTD) for PLC/DCS Applications

Channel-to-Channel Isolated Temperature Input (Thermocouple/RTD) for PLC/DCS Applications (CN0376)

The circuit shown in Figure 1 provides a dual-channel, channel-to-channel isolated, thermocouple or RTD input suitable for programmable logic controllers (PLC) and distributed control systems (DCS). The highly integrated design utilizes a low power, 24-bit, Σ-Δ analog-to-digital converter (ADC) with a rich analog and digital feature set that requires no additional signal conditioning ICs.

Each channel can accept either a thermocouple or a RTD input. The entire circuit is powered from a standard 24 V bus supply. Each channel measures only 27 mm × 50 mm.


Figure 1. PLC/DCS Channel-to-Channel Isolated Temperature Input

(Simplified Schematic: All Connections and Decoupling Not Shown)


Возможности

  • Highly Integrated Two-Channel Isolated PLC/DCS Input
  • Thermocouple/RTD Inputs
  • Signal and Power Isolation
  • Low Power, Small Size

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