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RCV420JP Datasheet(PDF) 8 Page - Texas Instruments |
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RCV420JP Datasheet(HTML) 8 Page - Texas Instruments |
8 / 12 page 8 ® RCV420 FIGURE 8. RCV420 Used in Conjunction with XTR101 to Form a Complete Solution for 4-20mA Loop. 0.01µF Q 1 1N4148 –12V 1µF 5 4 2 3 15 13 14 11 10 12 1µF V O = 0 to 5V RCV420 16 +12V 8 7 9 E B 14 11 12 13 4 3 2 XTR105 R CM = 1kΩ 1 0.01µF R Z 137 Ω R LIN1 5760 Ω R G 402 Ω RTD Pt100 100°C to 600°C 6 R G R G V IN – V IN + V LIN I R1 I R2 V REG V+ I RET I O 10 I O = 4mA – 20mA NOTE: A two-wire RTD connection is shown. For remotely located RTDs, a three-wire RTD conection is recommended. R G becomes 383Ω, RLIN2 is 8060Ω. See Figure 3 and Table I. FIGURE 9. Isolated 4-20mA Instrument Loop (RTD shown). 5 4 2 3 15 13 14 11 10 12 RCV420 16 16 2 15 10 8 7 9 V– V O V+ 0 – 5V ISO122 1 +15V 0 –15V 1µF 1µF Isolated Power from PWS740 0.01µF Q 1 1N4148 8 7 9 E B 14 11 12 13 4 3 2 XTR105 R CM = 1kΩ 1 0.01µF R LIN1 R G R LIN2 RTD 6 R G R G V LIN I R1 I R2 V REG V+ I RET I O 10 I O = 4mA – 20mA V IN – V IN + R Z NOTE: A three-wire RTD connection is shown. For a two-wire RTD connection eliminate R LIN2. |
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