Samson 3375-10 - Additional Equipment

3-2 EB 8332-1 EN
Design and principle of operation
3.2 Additional equipment
Mechanical limit contacts
Optionally, the actuator can be equipped
with two limit contacts. They consist of two
changeover switches. Their switching posi-
tions are changed independently from one
another by continuously adjustable cam
disks.
Thelimitcontacts(4)aresuitableforretrot-
ting. The installation and adjustment of the
mechanical limit contacts is described in the
'Installation' section.
Resistance transmitters
Optionally, the actuator can be equipped
with resistance transmitters. They are linked
to the gear and produce a resistance signal
betweenapprox.0and1000Ω(usable
range0to900Ω)proportionaltothevalve
travel. It can be used to assess the position of
the actuator stem.
The resistance transmitters (1) are suitable
forretrotting.Theinstallationandadjust-
ment of the mechanical limit contacts is de-
scribed in the 'Installation' section.
1 Actuator gear for resistance transmitter
2 Limit contact
3 Contact cam for limit contacts
4 Limit contacts
1 12 34
Fig.3-2: Inside view · Actuator board