Safety Instrumented Systems (Sis) - Emerson Rosemount 3051 Quick Start Manual

Quick Start Guide
8

Safety Instrumented Systems (SIS)

The following section applies to Rosemount 3051C Transmitters used in SIS
applications.
8.1 Installation
No special installation is required in addition to the standard installation
practices outlined in this document. Always ensure a proper seal by installing
the electronics housing cover(s) so that metal contacts metal.
The loop must be designed so the terminal voltage does not drop below
10.5 Vdc when the transmitter output is 22.5 mA.
Position the security switch to the ON position to prevent accidental or
deliberate change of configuration data during normal operation.
8.2 Configuration
Use any HART-compliant master to communicate with and verify
configuration of the Rosemount 3051.
User-selected damping will affect the transmitters ability to respond to
changes in the applied process. The damping value + response time must
not exceed the loop requirements.
1. Transmitter output is not safety-rated during the following:
configuration changes, multidrop, loop test. Alternative means
should be used to ensure process safety during transmitter
configuration and maintenance activities.
2. DCS or safety logic solver must be configured to match transmitter
configuration.
their operation values. Position the alarm switch to the required HI or
LO alarm position.
24
Figure 8-1 identifies the two alarm levels available and
March 2020
Emerson.com/Rosemount