Page 33
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
EL 9000 B 15U/24U Series
2.3.16
Adding new units
Some models have a spare position for another slave unit to install later in order to extend the total power. The
new slave unit can be purchased and delivered separately and installed on location. See
for
details. There are a few things to consider before extending the cabinet:
•
When installing the additional slave, the previous cabinet configuration will be modified regarding total current,
total power and the device name. The ratings as printed on the type label will become invalid. Actually, even the
article number isn’t valid anymore. This doesn’t affect operation, but in cases of seeking support or returning a
cabinet for repair, it’s an important detail
•
Existing cables for the DC connection would probably have to be replaced by bigger ones matching the higher
current
•
The slave unit to add must be of the same model as the already existing slave units
•
Depending on the resulting current after the installation of the additional unit, further bars on the DC bus have
to be installed. Contact us so we can assemble the correct set for you.
Adding a unit follows the same procedure as described in
and .
.
2.3.17
Emergency stop
An emergency stop system is optionally available and factory built-in (also see
). It consists of an emergency
stop switch (manual operation, mounted on top of the cabinet), two door contacts (rear door) and a contactor.
The three contacts are wired in series and will cut the units in the cabinet from AC supply once any of the breaker
contacts is acted.
2.3.17.1
External emergency stop contacts
It’s possible to extend the stop circuit with external contacts using two screw terminals located inside the cabinet
(accessible from the rear). These terminals are bridged by default. The bridge would be replaced by one or several
external breaker contacts in series, in order to have the emergency stop system act also when initiated from outside.
The external contacts must be of type “dry contact”, i.e. potential-free, and suitable for 24 V DC.
