Siemens SITRANS P Instrucciones de operaciones Pagina 179

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 234
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 178
11.3 Output
Output
HART PROFIBUS PA or Foundation Fieldbus
Output signal 4 … 20 mA Digital PROFIBUS-PA or
Foundation Fieldbus signal
Lower limit (continuously
adjustable)
3.55 mA, set to 3.84 mA in the factory
Upper limit (continuously
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
8+
9
P$
5
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
11.4 Measuring accuracy
Measuring accuracy (as per EN 60770-1) gauge pressure
HART PROFIBUS PA or Foundation Fieldbus
Reference conditions Rising characteristic curve
Start of scale value 0 bar
Seal diaphragm: stainless steel
Measuring cell with silicon oil filling
Room temperature 25°C (77°F)
Measuring span ratio r
r = maximum measuring span or set
measuring span
Technical data
11.4 Measuring accuracy
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 177
Vista de pagina 178
1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 233 234

Comentarios a estos manuales

Sin comentarios