Forum Gateway 560 Installation
95
Each of the two groups (1 or 2, or C and D, respectively, in the illustration)
requires its own power supply unit. Power for the control module is always
supplied by the group 1 power supply unit. The group 1 power supply unit
must therefore always be installed.
Modules can be installed either when the entire system is configured or as an
upgrade at a later time.
Notes on Disconnecting the Mains Supply
DANGER!
Hazardous voltages inside the device!
A Forum Gateway 560
must
be disconnected from the mains supply for the
following installation work:
●
Installation of the central control module
●
Installation of a power supply unit
If a 1-12 frame is being powered by two power supply units, it is de-energised
by unplugging
both
mains cables.
DANGER!
Always unplug the mains cables of both power supply
units when installing the central control module or a
power supply unit.
If you unplug the mains cable of the group 2 (B) power supply unit, the
Forum Gateway 560 will still be operational! However, only the modules
supplied by the group 1 (A) power supply unit, i.e. the central control module
and the interface cards in slots 1 - 6, will be functional.
If you unplug the mains cable of the group 1 (A) power supply unit, a
Forum Gateway 560 ceases to be operational. However, slots 7 - 12 (D) will
still be supplied with operating voltage. (Refer to the illustration
Forum Gateway 560: 1-12 frame slots
on page 94 to determine the location
of the modules specified in parentheses above.)
The LEDs of each module indicate whether the respective module is
operational. For further information on LED indicators, refer to
