Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manual de usuario descargar pdf (Pagina 71)

Differences Between Series A RTD Modules and Series B. C and D RTD Input Modules F–3

Publication 1771Ć6.5.129 - March 2000

• The excitation current on Series B flows out of termination A.

The excitation current on the series A flowed into termination A.

Systems wired according to the IR User’s Manual will work

without modification, presuming the transducer is polarity

insensitive.

• Allowable ambient temperature change to maintain accuracy is

C/min.

Description Series A Series B, C and D

Use of Data Table 8 in; 8 out; 8 read words, 14 write words 8 in; 8 out; 9 read words, 15 write words

Resistance Range 18.4 to 400.00 ohms 1.00 to 600.00 ohms

Common Mode Impedance <50 megohms shunted by <4700pF Greater than 10 megohms

Input Overvoltage Protection 40V rms continuous 120V rms continuous

Scan Time 50ms for 6 channels 50ms for 6 channels

Real Time Sampling None 50ms to 3.1s

AutoĆCalibration None Yes - Uses Block Transfer Write word 15

Open RTD Response Time None Open excitation (terminal A) to overrange: <0.5sec

Open common (terminal C) to underrange: <0.5sec

Open sense (terminal B): drift high

Power Dissipation 5.0W maximum 4.75W maximum

Thermal Dissipation 15.0 BTU/hr 16.2 BTU/hr

Agency Certification

(when product or packaging is marked)

• CSA certified

• CSA Class I, Division 2, Groups A, B, C,

D certified

• UL listed

• CSA certified

• CSA Class I, Division 2, Groups A, B, C, D

certified

• UL listed

• CE marked for all applicable directives

• Series D C-Tick marked for all applicable acts

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Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manual de usuario Pagina 71