13.4 Output
Output
HART
Output signal 4 … 20 mA
● Low saturation limit (continuously
adjustable)
3.55 mA, set to 3.8 mA in the factory
● High saturation limit (continuously
adjustable)
22.8 mA, factory-set to 20.5 mA or optionally 22.0 mA
● Ripple (without HART communication)
I
SS
≤ 0.5 % of the max. output current
Adjustable damping 0 … 100 s, continuously adjustable over remote operation
0 … 100 s, in steps of 0.1 s adjustable over display
● Current transmitter
3.55 … 22.8 mA
● Failure signal
3.55 … 22.8 mA
Load Resistor R [Ω]
● Without HART communication
U
H
Power supply in V
● With HART communication
HART communicator (Handheld) R =230 … 1100 Ω
SIMATIC PDM R =230 … 600 Ω
Characteristic curve
● Linearly increasing or linearly decreasing
●
Linear increase or decrease or according to the square root (only for
differential pressure and flow)
Bus physics –
Polarity-independent –
13.5 Operating conditions
Operating conditions for gauge pressure and absolute pressure (from the gauge pressure series)
Ambient conditions
● Ambient temperature
Note Observe the temperature class in hazardous areas.
Enclosure -40 … +100 °C (-40 … +212 °F)
Measuring cell with sili‐
cone oil filling
-40 … +85 °C (-40 … +185 °F)
Measuring cell with inert
oil
-40 … +85 °C (-40 … +185 °F)
Measuring cell with FDA-
compliant oil
-10 ...+85 °C (14 ... +185 °F)
Display -20 … +80 °C (-4 … +185 °F)
Technical data
13.5 Operating conditions
SITRANS P320/P420 with 4 to 20 mA/HART
228 Operating Instructions, 11/2019, A5E44852162-AC
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