Siemens SITRANS P DS III - Output Signal and Characteristics

Technical data
13.3 Output
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
199
13.3
Output
Output
HART
PROFIBUS PA and FOUNDATION
Fieldbus
Output signal 4 … 20 mA Digital PROFIBUS PA or
FOUNDATION
TM
Fieldbus signal
• Low saturation limit (fully
adjustable)
3.55 mA, set to 3.84 mA in the factory –
• High saturation limit (fully
adjustable)
23 mA, set to 20.5 mA or optionally
22.0 mA in the factory
–
• Ripple (without HART
communication)
I
SS
≤ 0.5 % of the max. output current –
adjustable time constants
damping coefficient
0 … 100 s, continuously adjustable 0 … 100 s, continuously adjustable
Adjustable time constants (T63)
with local operation
0 … 100 s, in steps of 0.1 s
Factory-set to 2 s
0 … 100 s, in steps of 0.1 s
Factory-set to 2 s
• Current transmitter
3.55 … 23 mA –
• Failure signal
3.55 … 23 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 … 500 Ω
–
Characteristic curve
• Linearly increasing or linearly decreasing
• Linear increase or decrease or square root extracting increasing (only for
DS III differential pressure and flow rate)
Bus physics
–
IEC 61158-2
Polarity-independent
–
Yes