Emerson Rosemount 2051 Reference Manual page 3

WARNING
SuperModule and electronics housing must have equivalent approval labeling in order to maintain hazardous location
approvals.
When upgrading, verify SuperModule and electronics housing certifications are equivalent. Differences in temperature class
ratings may exist, in which case the complete assembly takes the lowest of the individual component temperature classes (for
example, a T4/T5 rated electronics housing assembled to a T4 rated SuperModule is a T4 rated transmitter.)
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Severe changes in the electrical loop may inhibit HART Communication or the ability to reach alarm values. Therefore, Emerson
cannot absolutely warrant or guarantee that the correct failure alarm level (HIGH or LOW) can be read by the host system at the
time of annunciation.
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users' equipment. This could
be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access
by unauthorized personnel to protect end users' assets. This is true for all systems used within the facility.
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