Samson 3375, Mounting And Operating Instructions

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EB 8332-2 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
The Type 3375 Electric Actuator is used in
industrial plants as well as in heating, venti-
lation and air-conditioning systems.
This linear actuator is particularly suitable,
depending on whether the version is
with or
without fail-safe action , for attachment to
SAMSON Series 240 and 250 Valves as
well as to Type 3260 Valve (DN 200, 250
and 300) and Type 3214 Valve (DN 300
and 400).
The actuator can be used for various types of
control (see the 'Start-up and configuration'
section).
Principle of operation
The electric actuator consists of a reversible
asynchronous motor and a maintenance-free
planetary gear with ball screw drive. The ac-
tuator is switched off by torque-dependent
limit contacts. Additionally, the asynchro-
nous motor is protected by a thermal fuse.
3.1 Fail-safe action
The actuator versions with fail-safe action
contain a spring mechanism and an electro-
magnet. The actuator is moved by the force
of the spring to the fail-safe position when
the electromagnet (terminals L and N) is
de-energized. The direction of action de-
pends on the actuator version and cannot be
reversed.
3.2 Communication
Serial interface
The actuator is fitted with an RS-232 serial
interface as standard. This allows communi-
cation with TROVIS-VIEW using SSP proto-
col.
The actuator can also be fitted with an op -
tional RS-485 module (see the 'Installation'
section).
Configuration
The actuator can be configured with the
TROVIS-VIEW software. In this case, the seri-
al interface on the actuator is used to con-
nect the actuator to the computer.
The TROVIS-VIEW software enables the user
to easily configure the positioner as well as
view process parameters online.
TROVIS-VIEW can be downloaded free of
charge from our website at
u
www.samsongroup.com > Service &
Support > Downloads > TROVIS-VIEW.
Further information on TROVIS-VIEW (e.g.
system requirements) is available on our
website and in the Data Sheet
u
T 6661 as
well as the Operating Instructions
u
EB 6661.
Î
See the 'Start-up and configuration' sec -
tion.
Note
Note