The 3730-4 positioner is a smart, bus-powered field unit conforming to PROFIBUS-PA specification based on IEC 61158-2 transmission technology. The microprocessor-controlled positioner compares the reference variable cyclically transmitted over the PROFIBUS-PA net- work to the travel or opening angle of the control valve and pro- duces the corresponding output signal pressure. The Type 3730-4 Positioner communicates using PROFIBUS-PA specification according to IEC 61158 and IEC 61784 to ex- change data with programmable logic controllers, automation systems and various engineering tools.
The SAMSON 3730-4 is a smart, bus-powered field unit designed for attachment to pneumatic control valves. It conforms to the PROFIBUS-PA specification and uses a microprocessor to compare reference variables with valve travel, producing the corresponding output signal pressure. The device features automatic ID adaptation and integrated EXPERTplus diagnostics for safety-instrumented systems.
| Travel range (direct attachment) | 3.6 to 30 mm |
|---|---|
| Travel range (IEC 60 534-6-1) | 3.6 to 200 mm |
| Opening angle (rotary actuators) | 24 to 100° |
| Permissible operating voltage | 9 to 32 V DC |
| Maximum operating current | 15 mA |
| Degree of protection | IP 66 / NEMA 4X |
| Weight | Approx. 1.0 kg |
It communicates using PROFIBUS-PA specification according to IEC 61158 and IEC 61784.
The range is -45 to +80 °C, or -25 to +80 °C with an inductive limit switch.