FP302
Foundation Fieldbus to Pneumatic Signal Converter
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 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;
- Supply pressure: 20 psi;
- Air consumption: 0.15 scfm (20 psi supply pressure);
- The built-in volume booster allows high air capacity (4 SCFM);
- Vibrating resistant;
- Can be mounted in any position;
- Accuracy: 0.4 % of the span.
Some Characteristics:
|
Communication |
Digital only, Foundation Fieldbus, 31.25 kbit/s voltage mode with bus power |
|
Output |
3-15 psi (0,2-1,0 kg/cm?) |
|
Output Capacity |
6.7 Nm?/h (4 scfm) |
|
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.
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|
Configuration |
Using local adjustment magnetic tool if device is fitted with LCD display. Complete configuration possible using PC software interface. |
|
Power Supply |
18-22 psi (1,2-1,5 kg/cm?) |
|
Indication |
Optional LCD indicator |
|
Material |
Injected low copper aluminum with polyester painting or 316 stainless steel housing |
|
Process Temperature Limits |
-40 to 85?C (-40 to 185 ?F) |
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Ambient Humidity Limits |
0 to100 % RH |
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Hazardous Area Certification |
Explosion proof, weather proof and intrinsically safe |
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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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