Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 63)

Appendix
F
FĆ1
Differences Between Series A and Series B
RTD Input Modules
The following is a list of major changes from Series A to Series B RTD Input
Module (cat. no. 1771–IR).
The customer applied “10 ohm resistance value @ 0 o C” is now “10 ohm
resistance value @ 25 o C” with a range of 9.00 to 11.00 ohms.
Calibration is now done automatically using the auto–calibration feature, or
manually through programming.
Auto–calibration is done at 1.00 ohm and 402.0 ohms. Manual software
calibration is done at 1.00 and 402.00 ohms (not 18.83 and 375.61 ohms).
The module should be configured for platinum ohms display, not
temperature, during the calibration procedure.
If EEPROM read of the auto–calibration values fails, BTR WORD 1 bit 7 is
asserted.
RTS can be reduced to 100ms by programming RTS = 1.
The default RTS setting at power up is inhibited and data is available every
50ms for Series B (was 300ms for Series A).
Backplane power is approximately 0.85A at 5V. Series A was 1.0A at 5V.
Accuracy specifications over RANGE and TEMPERATURE are:
Typical
Copper = + 4.91 o C
Platinum = + 2.60 o C
OHM = + 0.82 Ohms
User offset calibration range is +1.29 ohms maximum. Series A was +3.81
ohms. Offset correction is 10.2mohms/bit. User gain correction is now
0.00152588%/LSB for a maximum of +0.193787%.
Multiple BTRs may occur before configuration of the module.
Major Differences between
Series