Rockwell Automation 1794 FLEX I/O System with ControlLogix for SIL2 - Manual (Page 8)

Publication 1794-RM001G-EN-P - December 2011
1-4 SIL Policy
• Calibration of analog input and output modules to verify that accurate
data is obtained from and used on the modules.
For more information on system proof tests, see Publication 1756-RM001 . For
more information on the necessary I/O module, see Table 1.1.
IMPORTANT
Users’ specific applications will determine the timeframe
for the proof test interval.
However, keep in mind that the Probability of Failure on
Demand (PFD) calculations listed in Table 1.2 on page 1-8
use a proof test interval of once per year. If the proof test
interval is changed, the information must be recalculated.