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 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/cm²) |
Output
Capacity |
6.7
Nm³/h (4 scfm) |
Accuracy |
0.4%
of span |
Power
Supply |
Bus
powered: 9-32 Vdc |
Power
Consumption |
Quiescent
12 mA |
Function
Blocks |
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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/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 |
Explosion
proof, weather proof and intrinsically safe |
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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