Siemens 6DR55 Series, Manual

Page: 36 / 178

Design and method of operation
34
SIPART PS2 PA Manual
A5E00127926--05
2.6.2 Installation of options modules in explosion proof version
The following option modules are available for the positioner in the
explosion proof version:
-- I
y
module
-- Alarm module
The options modules are protected and mechanically fixed by a module
cover ((1), see figure 17, page 36).
.
NOTE
The housing must be opened to install the options modules. The
degree of protection IP66/NEMA4x is not guaranteed as long as the
positioner is open.
!
WARNING
In areas in which the atmosphere may be potentially explosive, the
explosion proof positioner may only be supplied with electrical auxiliary
power when the housing is closed and when built--in, approved
electronics are used.
The feed--though openings for the electronic connections must be
sealed with EEX-d certified cable glands or EEx-d certified plugs or an
ignition lock must be mounted at a maximum distance of 46 cm
(18 inches) when using the “conduit”--system.
See figure 17, page 36. Disconnect or isolate the power supply cables
first.
To open the positioner, the safety catch (12) must be opened and the
screw--on cover unscrewed.
After loosening the four fixing screws (13.1) the complete rack (13) can
be removed. The actuator may have to be turned so that the clutch can
be easily disengaged.
Remove the module cover (1). To do this, the two screws (1.1) must be
removed with a screwdriver.
Installation
Open the positio-
ner