Emerson Rosemount 2051G - Configuring in SIS Applications; Damping; Alarm and Saturation Levels

66
Reference Manual
00809-0400-4101, Rev BA
Safety Instrumented Systems Requirements
January 2018
Safety Instrumented Systems Requirements
7.4 Configuring in SIS applications
Use any HART capable configuration tool to communicate with and verify configuration of the
Rosemount 2051G.
Note
Transmitter output is not safety-rated during the following: configuration changes, multidrop, and loop
test. Alternative means should be used to ensure process safety during transmitter configuration and
maintenance activities.
7.4.1 Damping
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.
Reference “Damping” on page 16 to change damping value.
7.4.2 Alarm and saturation levels
DCS or safety logic solver should be configured to match transmitter configuration. Figure 7-1 identifies
the three alarm levels available and their operation values.
Figure 7-1. Alarm Levels
Rosemount alarm level
Namur alarm level
Custom alarm level
1. Transmitter Failure, hardware or software alarm in LO position.
2. Transmitter Failure, hardware or software alarm in HI position.
Normal Operation
4 mA
20 mA
20.8 mA
high saturation
21.75
(2)
3.9 mA
low saturation
3.75 mA
(1)
Normal Operation
4 mA
20 mA
20.5 mA
high saturation
22.5
(2)
3.8 mA
low saturation
3.6 mA
(1)
Normal Operation
4 mA
20 mA
20.1 - 22.9 mA
high saturation
20.2 - 23.0
(2)
3.7 - 3.9 mA
low saturation
3.6 - 3.8 mA
(1)