Rockwell Automation 1771-IR Series D RTD Input Module User Manual - Manual (Page 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
1
o 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