Samson 3274 - Versions; Additional Equipment

EB 8340 EN 3-3
Design and principle of operation
3.2 Versions
Depending on the application, the following
versionsareavailable(seesection3.8on
page 3-6)
Withelectricoverride:
Manual override with two pushbuttons
− Type3274-11
− Type3274-12
− Type3274-13
− Type3274-14
Withmechanicaloverride:
Mechanical override implemented using an
Allenkey(widthacrossats24mm)atthe
additional gear housing
− Type3274-15
− Type3274-16
− Type3274-17
− Type3274-18
Versions with fail-safe action and with elec-
tricoverride:
− Type3274-21
− Type3274-22
− Type3274-23
The Types3274-11, -12, -15 and -16
Actuators as well as the version with 110V
supply voltage described in this document
are no longer available since the beginning
of 2020. The description applies to devices
already in use.
Note
3.3 Additional equipment
Positioner
Thepositionercomparesthe0/4to20mA
or0/2to10Vcontrolsignalissuedbythe
controller with the position of a potentiome-
ter which is proportional to the travel. The
actuator stem is moved to the position deter-
mined by the positioner.
The input signal results in an output signal of
0/4to20mAor0/2to10V.
Priority circuit
Theversionwithpositioneristtedwitha
priority circuit, which is activated at termi-
nals 82 and 83 (see the 'Installation' sec-
tion).
Position transmitter
The version with three-step control can be
ttedwithapositiontransmitter.A
potentiometer(0to1000Ω)isusedtoissue
a0/4to20mAor0/2to10Voutput
signal, which is proportional to the travel.
Mechanical limit contacts
Theactuatorcanbettedwithamaximum
of three mechanical changeover switches.
Optionally, the actuators can be equipped
with two limit contacts, which are actuated
by continuously adjustable cam disks. The
oatingcontactscanbeusedaseithermake
orbreakcontactstoinuencethetasksof
control equipment.
The installation and adjustment of the
mechanical limit contacts is described in the
'Installation' section.