Electropneumatic Positioner Type 3730-2 and
Type 3730-3 with HART® communication
Application
Single-acting or double-acting positioner for attachment to
pneumatic control valves. Self-calibrating, automatic adapta
tion to valve and actuator.
Reference variable 4 to 20 mA
Travels 3.6 to 200 mm
Opening angles 24° to 100°
The positioner ensures a predetermined assignment of the valve
stem position (controlled variable x) to the electric input signal
(reference variable w). It compares the control signal received
from a controller to the travel or opening angle of the control
valve and issues a corresponding output signal pressure (output
variable y).
Special features
* Simple attachment to common linear and rotary actuators
with SAMSON direct attachment interface (Fig. 1), NAMUR
rib (Fig. 2), valves with rod-type yokes acc. to IEC 60534-6-1
or rotary actuators acc. to VDI/VDE 3845 (Fig. 3)
* Any desired mounting position
* Simple one-knob, menu-driven operation
* LCD easy to read in any mounting position due to selectable
reading direction
* Configurable with a PC over the SSP interface using the
TROVIS-VIEW software
* Variable, automatic start-up with four different initialization
modes
* Preset parameters - only values deviating from the standard
need to be adjusted
* Calibrated travel sensor without gears susceptible to wear
* "Sub" initialization mode (substitution) allows the positioner
to be started up in case of emergency whilst the plant is run
ning without the valve moving through the whole travel range
* All parameters saved in EEPROM (protection against power
failure)
* Two-wire system with a small electrical load between 300 Ω
and 410 Ω depending on the version (see Table 1)
* Adjustable output pressure limitation
* Tight-closing function can be activated
* Continuous monitoring of zero point
* Integrated temperature sensor and operating hours counter
* Two standard configurable position alarms
* Self-diagnostics; alarms as condensed state conforming to
NAMUR Recommendation NE 107, issued over a fault alarm
contact or optional analog position transmitter
* Integrated EXPERT+ diagnostics (see T 8388 EN), suitable for
control valves for throttling and on/off service with additional
partial stroke test for valves in safety-related applications
* Certified according to IEC 61508/SIL
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and spare parts from brands such as Fi sher, Rotork, Samson, ASCO, TOPWORX, GO SWITCH, YTC, Masoneilan, and more. With years of
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