Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual page 250

Safety Instrumented Systems (4-20 mA only)
April 2019
Figure 8-2: Alarm Levels and Operation Values
A. Rosemount Alarm Level
B. Normal Operation
C. Namur Alarm Level
1.
2.
3.
4.
It is assumed that the current output signal is fed to a SIL 2-compliant analog input board
of a safety logic solver. For instructions on alarm level settings see
Note
Only the High or Low Alarm Mode can be used for the safety function. Do not choose
Freeze Current.
8.6.3 Write protection
A Rosemount 5300 Level Transmitter safety-certified transmitter should always be
protected from unintentional configuration changes by a password protected function. It
is recommended to use write protection described in
8.6.4 Site acceptance
After installation and/or configuration, proper operation of the transmitter (including
verification of all configuration changes) must be verified. A site acceptance test is
therefore recommended. The proof-tests outlined in
applications
250
3.75 mA (1) 4 mA
(3)
3.9 mA
3.6 mA (1) 4 mA
(3)
3.8 mA
Transmitter Failure, hardware or software alarm in Low position.
Transmitter Failure, hardware or software alarm in High position.
Low saturation
High saturation
can be used for this.
A
B
20 mA
(4)
20.8 mA
C
B
20 mA
(4)
20.5 mA
Write protection.
Perform proof test for SIS
Rosemount 5300 Level Transmitter
Reference Manual
00809-0100-4530
21.75 mA (2)
22.5 mA (2)
Analog output (HART).