204
Reference Manual
00809-0100-4530, Rev DD
Safety Instrumented Systems (4-20 mA only)
May 2016
Safety Instrumented Systems (4-20 mA only)
To identify a Rosemount 5300 Series safety-certified transmitter:
Verify the option code QS or QT in the model code, on the label affixed to the
outside of the transmitter head.
Check if a yellow label is affixed to the transmitter head for option code QT.
Before doing any configuration, write down the serial number from the label, and
make sure you are connected to the correct transmitter by verifying the same serial
number in your communication device.
Note
In Rosemount Radar Master, this information can be found in the Device Properties window.
Select
Device
>
Properties
.
8.5
Functional specifications
The safety function is based on the analog output 4-20 mA, used as the safety variable. It is
configured to activate the alarm function if an error occurs. If a measured value goes
beyond the measurement range, the transmitter enters saturation mode (limit alarm is
disabled) or alarm mode, depending on the current configuration. The minimum time for
the alarm condition is 200 ms.
Only the 4-20 mA output can be used in the safety function.
The HART protocol can only be used for setup, calibration, and diagnostic purposes, not for
safety critical operation. The measurement signal used by the logic solver must be the
analog 4-20 mA signal proportional to the level generated.
8.6
Installation in SIS applications
The device should be installed and configured as a level sensing device per manufacturer’s
instructions. The materials must be compatible with process conditions and process fluids.
No special installation is required in addition to the standard installation practices outlined
in this manual.
Environmental and operational limits are available in
Appendix A: Specifications and
.
Safety Device (QS option)
Serial No
Software/Firmware
