Samson 5824 - Fail-Safe Action; Communication

3-2 EB 5824-2 EN
Design and principle of operation
TestingaccordingtoDINEN14597
TheTypes5825ElectricActuatorwithfail-
safe action "actuator stem extends" is tested
bytheGermantechnicalsurveillanceassoci-
ation(TÜV)accordingtoDINEN14597in
combination with various SAMSON valves.
Tested versions are indicated on the name-
plate. Refer to Technical data.
The registration number is available on re-
quest.
3.2 Communication
Serial interface
TheactuatoristtedwithanRS-232serial
interface. This allows communication with
TROVIS-VIEW using SSP protocol (see
Fig.3-2).
Serial inter-
face
Fig.3-2: Serial interface
3.1 Fail-safe action
Type 5825 with fail-safe action
The actuators with fail-safe action largely
correspondstotheType5824described
above.However,theyalsoincludeaspring
mechanism (8) and an electromagnet.
The actuator moves to the fail-safe position
when the electromagnet is de-energized. This
causes the actuator stem to be completely re-
tracted or extended by the spring mecha-
nism.
TheType5825Actuatorisavailableinthe
followingversions:
Fail-safe action
− Actuatorstemextends: upon supply
voltage failure, the actuator stem
extends.
− Actuatorstemretracts: upon supply
voltage failure, the actuator stem
retracts.
Î The fail-safe action must not be used to
control the valve position.
The Type 5825 Actuator does not have a
handwheel (2) on the housing cover. Manual
override is possible, after removing the front
cover,usinga4mmAllenkey.Theactuator
returns to its original position as soon as the
Allen key is released.