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Reference Manual
00809-0100-4530, Rev DD
Safety Instrumented Systems (4-20 mA only)
May 2016
Safety Instrumented Systems (4-20 mA only)
The loop must be designed so that the terminal voltage does not drop below the minimum
input voltage when the transmitter output is 22.5 mA. See values in
.
Table 8-2. Minimum Input Terminal Voltage (U
i
) at Different Currents
It is assumed that the personnel installing, configuring, and operating the system have the
knowledge equal or greater than that of a qualified Instrument Technician familiar with
safety-related systems, process control applications, and general instrument use.
Note
The Rosemount 5300 Series Transmitter is not safety-rated during maintenance work,
configuration changes, multidrop, loop test, or other activity that affects the safety
function. Alternative means should be used to ensure process safety during such activities.
8.7
Configuring in SIS applications
Use a HART-compliant master, such as Rosemount Radar Master or a Field Communicator,
to communicate with and verify configuration of the Rosemount 5300 Series. A full review
of configuration methods is available in
These instructions are applicable to the Rosemount 5300 Series safety-certified options
with any differences noted.
Damping
User adjusted damping will affect the transmitter’s ability to respond to process changes.
Therefore, the
damping response time
should not exceed the loop requirements. For
further information on damping, see
.
Alarm and saturation levels
DCS or safety logic solver should be configured to handle both High alarm and Low alarm. It
is also required that the transmitter is configured for High or Low alarm.
identifies the alarm levels available and their operation values
(1)
.
Hazardous approval
Current
3.60 mA
3.75 mA
21.75 mA
22.50 mA
Minimum input voltage (U
I
)
Non-Hazardous Installations and
Intrinsically Safe Installations
16 Vdc
16 Vdc
11 Vdc
11 Vdc
Explosion-proof / Flameproof
Installations
20 Vdc
20 Vdc
15.5 Vdc
15.5 Vdc
1.
In certain cases, the transmitter does not go into the user defined alarm state. For example, in case of a short circuit, the transmitter
goes into High Alarm state even if Low Alarm has been configured.