BELGACOM Forum 523, Mounting And Commissioning Manual

Page: 42 / 244

Interface Cards 40
Installation
Interface Cards
Forum 523/524 can be expanded through the use of interface
cards. Forum 523/524 has two slots for interface cards.
Please note: Switch off the Forum 523/524. Pull the plug out of
the mains power supply socket. Never install or de-install inter-
face cards when the Forum 523/524 is switched on.
Installing Interface Cards
Each interface card is connected to the main board via two sock-
ets. Forum 523/524’s slots have the following characteristics:
z
There is no prescribed order for assignment. You can, for
example, use an interface card in slot 2, although slot 1 is not
assigned.
z
Slot 1 is connected to a group of pressure terminals. The
pressure terminals of the slot are given the same colour to
make them easier to identify.
z
The slots are not identical. Interface cards can therefore not be
used in all and any slots. Please see the overview under
Position of the Interfaces starting on page 42 for details.
Installing an interface card
label
handle here
handle here
1
2