Allen-Bradley 1794-IE8H Spécifications télécharger pdf (Page 9)

Publication 1794-RM001F-EN-P - September 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.

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Allen-Bradley 1794-IE8H Spécifications Page 9