Calibration drift checks, Off condition, So we can use that, too. in this example, 15.4 k – Rockwell Automation 1715-OF8I Redundant I/O System User Manual User Manual
Page 283: Is a close standard value, so we use 15 k
Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
283
1715-IB16D Digital Input Module Diagnostics
Appendix C
Off Condition
For an off condition, we need to add a new resistor to the formula. We already
know R2 is 3.9 k
so we can use that, too.
In this example, 15.4 k
is a close standard value, so we use 15 k
, which changes
the voltage slightly, but not enough to make us change our range.
Calibration Drift Checks
The 1715I/O analog modules are calibrated at the factory with a default
calibration. As time passes, the electrical specifications of various electronic
components of your analog module drift.
To make sure the best possible accuracy in measurements made by your analog
input module and signals generated by your analog output module are
Shield
(if used)
Terminal
Blocks
OV
20
Ω
100
Ω
50 mA
4.99k
Ω
Termination
Assembly
+24V dc
R1
R2
45678
5 V DC
5.1K
SW1
3.9k
45684