FP302

Foundation Fieldbus to Pneumatic Signal Converter

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In order to connect existing valve actuators to a FIELDBUS system, SMAR developed a FIELDBUS to pneumatic signal converter, with very low air consumption and a very stable output signal. A 0 to 100% digital signal from the FIELDBUS is converted into a 3 to 15 psi or 3 to 30 psi pneumatic signal according to a characteristic curve selected by the user. Besides the normal PID control function, linearization, master capability, alarms and damping, the FP302 offers signal limitation and reversing and many other features for valve actuation:

  • Output signal: 3 to 15 psi (default) or 3 to 30 psi (extended)
  • Supply pressure: 18 to 100 psi;
  • Vibrating resistant;
  • PID Controller
  • Can be mounted in any position;
  • Accuracy: 0.4 % of the span.
 
Specifications
Communication
Digital only, Foundation Fieldbus, 31.25 kbit/s voltage mode with bus power
Output
3-15 psi (0,2-1,0 kg/cm²) or 3 to 30 psi (0,2-2,1 kg/cm 2)
Output Capacity

3.40 Nm3/h (2 scfm) @ 1.24 bar (18 psi) air supply;
6.80 Nm3/h (4 scfm) @ 2.8 bar (40 psi) air supply;
15.30 Nm3/h (9 scfm) @ 7 bar (100 psi) air supply.

Accuracy
0.4% of span
Power Supply
Bus powered: 9-32 Vdc
Power Consumption
Quiescent 12 mA
Function Blocks
Up to 20 Dynamically Instantiable Function Blocks.
The Function Blocks available allow simple and complex control strategies to be placed inside the field device, making the field device an integral part of the control system. In order to fully benefit from the Function Blocks in the device a True Foundation Fieldbus system is recommended.
Configuration
Using local adjustment magnetic tool if device is fitted with LCD display. Complete configuration possible using PC software interface.
Supply Pressure
18 - 100 psi (1,24 - 7 kg/cm²)
Indication
Optional LCD indicator
Material
Injected low copper aluminum with polyester painting or 316 stainless steel housing
Process Temperature Limits
-40 to 85ºC (-40 to 185 ºF)
Ambient Humidity Limits
0 to100 % RH
Hazardous Area Certification
Check order code.
Mounting
Wall, panel, or 2" pipe with optional bracket
Weight
Nominal: 1.80 kg;
Digital display adds: 0.13 kg;
Mounting bracket adds: 0.60 kg.

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