FRI303 Profibus-PA Remote I/O

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The FRI303 PROFIBUS-PA Remote I/O makes the integration of Profibus and conventional I/O easy. FRI303 is a PROFIBUS-PA device that has two built-in relays and two dry contact inputs making integration of PROFIBUS-PA and conventional devices such as on/off sensors, solenoids, on/off valves, electrical actuators, motors, pumps, starters, etc.

The FRI303 can be located at the field, mounted close to the conventional devices without the need to run the conventional wiring to the control room. The FRI303 is an integral part of SYSTEM302 but also integrates into other systems supporting Profibus.



Profibus-PA on 31.25 kbit/s voltage mode according to IEC 61158-2.

Power Consumption

Quiescente 17mA (bus power).

Output Impedance

Non-intrinsic safety from 7.8 kHz - 39 kHz should be greater or equal to 3 kΩ. Intrinsic safety output impedance (assuming an IS barrier in the power supply) from 7.8 kHz – 39 kHz should be greater or equal to 400 Ω.

Function Blocks

2 Discrete Input Function Blocks (DIs) and  2 Discrete Output Function Blocks (DOs).

Temperature Limits

Operation: -40 to  85 ºC (-40 to 185 ºF).
Storage:    -40 to 110 ºC (-40 to 230 ºF).


-10 to   60 ºC ( 14 to 140 ºF) Operation;


-40 to   85 ºC (-40 to 185 ºF) without damage.


Injected low copper aluminum with polyester painting or 316 stainless steel housing.

Local Configuration

Using local adjustment magnetic tool if device is fitted with LCD display. Complete configuration possible using PC software interface.


Via Profibus Communication using tools based on EDDL and FDT/DTM.


Optional LCD indicator.


Wall, panel, or 2" pipe with optional bracket.


Nominal: 0.80 kg;
Digital display adds: 0.13 kg;
Mounting bracket adds: 0.60 kg.


2 dry contact inputs electrically isolated from each other.


02 built-in relays:

  • 02 Normally-closed (NC);
  • 02 N.O Normally-open (NO);
  • 01 N.C. and 01 N.O.


According to IEC 801.


According to IEC 61158-2 and FISCO model.

Contact Us

“Industrial Technical Services is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels”.


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