IF302 Triple Channel Current to FOUNDATIONTM Fieldbus Converter

The IF302 is from the first generation of Fieldbus devices. It is a converter mainly intended for interface of analog transmitters to a Fieldbus network. The IF302 receives a current signal, typically 4-20 mA or 0-20mA, and makes it available to the Fieldbus system. The digital technology used in the IF302 enables a single model to accept three inputs and also provide several types of transfer functions, an easy interface between the field and the control room and several interesting features that reduce considerably the installation, operation and maintenance costs.

The IF302 is part of Smar’s complete 302 series of Fieldbus devices. Fieldbus is a complete system enabling distribution of the control function to equipment in the field.

Using Fieldbus technology, with its capability to interconnect several devices, very large control schemes can be constructed. In order to be user friendly, the function block concept was introduced. The user may now easily build and overview complex control strategies. Another advantage is added flexibility, the control strategy may be edited without having to rewire or change any hardware.

The need for implementation of Fieldbus in small as well as large systems was considered when developing the entire 302 series of Fieldbus devices. They have the common features of being able to act as a master on the network and be configured locally using a magnetic tool, eliminating the need for a configurator or console in many basic applications.


Some Characteristics:

0-20 mA, 4-20 mA or any within 0 and 20 mA. Reverse polarity protected.
FOUNDATION Fieldbus on 31.25 kbit/s voltage mode according to IEC 61158-2
±0.03% of span for 4-20 mA, 0.005 mA for other spans
Power Supply
Bus powered: 9-32 Vdc.
Power Consumption
Quiescent 12 mA.
Function Blocks
Up to 20 Dynamically Instantiable Function Blocks.
Click here for the list of available 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.
For more information about SYSTEM302, click here.
Master Capacity
Fieldbus master backup.
Using local adjustment magnetic tool if device is fitted with LCD display. Complete configuration possible using PC software interface.
Optional LCD indicator.
Injected low copper aluminum with polyester painting or 316 stainless steel housing.
Process Temperature Limits
Ambiente: -40 a 85 ºC (-40 a 185 ºF)
Ambient Humidity Limits
0 to 100 % RH
Hazardous Area Certification
Explosion proof, weather proof and intrinsically safe.
Wall, panel, or 2" pipe with optional bracket.
Nominal: 0.80 kg;
Digital display adds: 0.13 kg;
Mounting bracket adds: 0.60 kg.


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