Siemens Technical specifications, Profibus PA or Foundation Fieldbus Input

© Siemens AG 2008

SITRANS P measuring instruments for pressure

Transmitters for gage, absolute and differential pressure, flow and level

DS III series for absolute pressure (from gage pressure series)

■Technical specifications

SITRANS P, DS III series for absolute pressure (from the gage pressure series)

	HART		PROFIBUS PA or FOUNDATION Fieldbus
Input					2
Measured variable	Absolute pressure
Spans (infinitely adjustable) or	Span	Max. perm. test	Nominal measuring	Max. perm. test
nominal measuring range and		pressure	range	pressure
max. permissible test pressure
	8.3 ... 250 mbar a	6 bar a	250 mbar a	6 bar a
	(0.12 ... 3.6 psi a)	(87 psi a)	(3.6 psi a)	(87 psi a)
	43 ... 1300 mbar a	10 bar a	1300 mbar a	10 bar a
	(0.62 ... 18.9 psi a)	(145 psi a)	(18.9 psi a)	(145 psi a)
	160 ... 5000 mbar a	30 bar a	5 bar a	30 bar a
	(2.32 ... 72.5 psi a)	(435 psi a)	(72.5 psi a)	(435 psi a)
	1 ... 30 bar a	100 bar a	30 bar a	100 bar a
	(14.5 ... 435 psi a)	(1450 psi a)	(435 psi a)	(1450 psi a)
Lower measuring limit
• Measuring cell with silicone oil filling	0 mbar a (0 psi a)
Upper measuring limit	100% of max. span
Output
Output signal	4 ... 20 mA		Digital PROFIBUS PA or FOUNDATION Fieldbus
			signal
• Lower limit (infinitely adjustable)	3.55 mA, factory preset to 3.84 mA		-
• Upper limit (infinitely adjustable)	23 mA, factory preset to 20.5 mA or optionally set		-
	to 22.0 mA
Load
• Without HART communication	RB ≤ (UH - 10.5 V)/0.023 A in Ω,
			-
	UH : Power supply in V
• With HART communication	RB = 230 ... 500 Ω (SIMATIC PDM) or		-
	RB = 230 ... 1100 Ω (HART Communicator)
Physical bus	-		IEC 61158-2
With polarity reversal protection	-		Yes
Accuracy	To EN 60770-1
Reference conditions	Increasing characteristic, start-of-scale value 0 bar, stainless steel seal diaphragm, silicone oil filling,
(All error data refer always refer to the set	room temperature 25 °C (77 °F)) r: Span ratio (r = max. span / set span)
span)
Error in measurement and fixed-point setting
(including hysteresis and repeatability)
• Linear characteristic			≤ 0.1%
- r ≤ 10	≤ 0.1%
- 10 < r ≤ 30	≤ 0.2%
Long-term drift (temperature change ±30 °C	≤ (0.1 ⋅ r)%/year		≤ 0.1%/year
(±54 °F))
Influence of ambient temperature
• at -10 ... +60 °C (14 ... 140 °F)	≤ (0.1 ⋅ r +0.2)%		≤ 0,3%
• at -40 ... -10 °C and +60 ... +85 °C	≤ (0.1 ⋅ r + 0.15)%/10 K		≤ 0.25%/10 K
(-40 ... +14 °F and 140 ... 185 °F)
Measured Value Resolution	-		3 ⋅ 10-5of nominal measuring range

Siemens FI 01 · 2009

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