Samson 3274 - Electrical Connection

EB 8340 EN 5-9
Installation
5.7 Electrical connection
Risk of fatal injury due to electric shock.
Î Upon installation of the electric cables,
you are required to observe the regula-
tions concerning low-voltage installations
according to DINVDE0100 as well as
the regulations of your local power sup-
plier.
Î Only use a suitable supply voltage which
guarantees that no dangerous voltages
reach the device in normal operation
and in the event of a fault in the system
or any other system parts.
Î Only perform the electrical connection
after switching off the supply voltage.
Make sure the supply voltage cannot be
switched on again unintentionally.
Special motor electronics ensures that the
contacts of the controller's output relay (e.g.
for three-step control) are protected and only
loaded with relatively low control capacities
when the actuator is wired according to the
circuit diagrams.
The power switching is performed by a TRI-
AC and a relay in the motor electronics.
Howtoproceed:
Î Unscrew and remove the side housing
cover.Guidethecablesthroughtheca-
ble glands on the housing to the termi-
nalsandconnectthem(seeFig.5-5to
Fig.5-7orcircuitdiagramstuckinside
the housing cover).
If required, two additional cable glands can
be mounted after carefully knocking out the
blanking plugs.
Î Connect the grounding conductor to the
separate PE terminal on the inside hous-
ing wall.
Accessories
The wiring diagrams apply to the accessories
(Fig.5-5toFig.5-7)aswell.
Î Do not connect the limit contacts to the
terminal block, but to a separate screw
terminal.
Fortheversionwithpositioner(seeFig.5-6)
andpositiontransmitter(Fig.5-7),output
signals, which are proportional to the valve
travel, can be provided at the terminals 31,
32, 33 to be used for position feedback (sig-
nal increases as the actuator stem retracts).
Î Jumpertheterminals31and32when
the voltage output is used for position
feedback.
Fuse
Aholderwithane-wirefuse(seethe'De-
sign and principle of operation' section) on
the motor electronics board protects the actu
-
ator and contacts of the external controller.
DANGER
!
Note