Samson TROVIS 3730-3 Notice De Montage Et Mise En Service page 197

13 Description of Equipment or Protective System:
TROVIS 3730-1
General – The TROVIS 3730-1 Positioner is a single acting positioner for attachment to pneumatic
control valves. The positioner mainly consists of a non-contact travel sensor system, an i/p converter
and the electronics with the microcontroller. The valve position is transmitted either as an angle of
rotation or a travel to the pick-up lever, from there to the travel sensor and forwarded to the
microcontroller. The PID algorithm in the microcontroller compares the valve position measured by the
travel sensor to the 4 to 20 mA DC control signal issued by the control system after it has been converted
by the AD converter. In case of a set point deviation, the i/p converter causes the actuator to be either
vented or filled with air. As a result, the closure member of the valve is moved to the position determined
by the reference variable. The pneumatic module is supplied with supply air and the flow rate of the
module's output can be restricted by software
Construction - The Type TROVIS 3730-1 Positioner mainly consists of the electronics part. The parts
are assembled in an enclosure made of aluminium die cast or stainless-steel die cast. The enclosure
has a cover with a polymeric inspection window. As an alternative to the polymeric material, the window
can be made from aluminium. The enclosure has an ingress protection rating of IP66
See Annex for model code, thermal and electrical values.
TROVIS 3730-3
General - The Type TROVIS 3730-3 HART Positioner is a single acting positioner for attachment to
pneumatic control valves. The positioner ensures a predetermined assignment of the valve position
(controlled variable x) to the input signal (reference variable w). It compares the input signal received
from a control system to the travel or rotational angle of the control valve and issues a corresponding
output signal pressure (output variable y) for the pneumatic actuator.
Construction - The Type TROVIS 3730-3 HART Positioner mainly consists of the electronics part and
one pneumatic module. The parts are assembled in an enclosure made of aluminium die cast or stainless-
steel die cast. The enclosure has a cover with a polymeric inspection window. As an alternative to the
polymeric material the window can be made from aluminium. The enclosure has an ingress protection
rating of IP66
See Annex for model code, thermal and electrical values.
3730-4/5
General - The positioners type 3730-41, 3730-51, 3730-45 and 3730-55 are communication-capable,
bus-powered field devices which are used to assign a valve position to a control signal. The bus interface
connection (bus-coupling) can be performed according to the FISCO-concept for both specifications,
Profibus PA and FoundationTM Fieldbus. They are mounted onto levitation and slewing actuators. Non-
flammable media are used as pneumatic auxiliary power. The equipment is intended for the application
inside the hazardous area.
The positioners type 3730-48 and 3730-58 are communication-capable, bus powered field devices which
are used to assign a valve position to a control signal. They are mounted onto levitation and slewing
actuators. Non-flammable media are used as pneumatic auxiliary power. The equipment is intended for
the application inside the hazardous area.
Construction - The Type 3730-4/5 Positioner mainly consists of the electronics part. The parts are
assembled in an enclosure made of aluminium die cast or stainless-steel die cast. The enclosure has a
cover with a polymeric inspection window. As an alternative to the polymeric material, the window can
be made from aluminium. The enclosure has an ingress protection rating of Type 4X and IP66
See Annex for model code, thermal and electrical values.
THIS CERTIFICATE MAY ONLY BE REPRODUCED IN ITS ENTIRETY AND WITHOUT CHANGE
FM Approvals Ltd. Voyager Place, Maidenhead, Berkshire, SL6 2PJ. United Kingdom
T: +44 (0) 1753 750 000 F: +44 (0) 1753 868 700 E-mail:
F UKEX 029 (Jan/21)
EB 8484-3 FR
SCHEDULE
to Type Examination Certificate No. FM21UKEX0203X
atex@fmapprovals.com www.fmapprovals.com
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