ABB AC 800M

Enclosures Section 2 Installation
48 3BSE 027 941 R301
The AC 800M controller will shut down safely in the event of a power failure.
During down-time, the application memory and the system clock will be backed up
by the internal battery. In systems subject to long non-operational periods, it is
recommended that an external battery back-up unit be installed. When the power
supply is reconnected, the AC 800M Controller will re-start and run the application
as normal.
If the effects of unexpected shutdowns are not acceptable, it is highly recommended
that the AC 800M Controller be fully protected by connection to an Uninterruptable
Power Supply (UPS) source.
Enclosures
The AC 800M and S800 I/O units hold protection class IP20, with each unit being
individually CE-marked. Although these units can be used without an additional
enclosure, it is recommended, within a normal industrial environment, to use a
protection class higher than IP20 by adding a suitable enclosure.
Normally the use of an additional enclosure will not influence the EMC
characteristics of the controller.
Enclosure Mounting
When mounting the controller enclosure, it is important to provide certain minimum
distances between the enclosure, the walls and the ceiling, in order to provide
satisfactory ventilation.
If the enclosure is provided with removable wall cladding, it is important to ensure
that this is not removed from any enclosure adjacent to other enclosures containing
equipment not belonging to the AC 800M Controller and its connected S800 I/O.