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TEMA TELECOMUNICAZIONI SRL
Doorphone AA-550
MAS-AA550-REV07EN
Page 27 of 67
8.3.3. Connecting the system expansion AA-516R
Once that the bottom rear plastic box of the
system is arranged in the wall, take the front
panel with the electronic board, insert the two
transparent plastic pins present on frame into
the appropriate holes on the wall box and get
ready to connect the wires to the terminal
blocks. Make sure that all cables, including
telephone line, have not yet been powered
before connecting them to the card. These
operations must be performed by a
specialized technician. Take the cables that
have been prepared by one of the outgoing
access on the base system and start
connecting. Remove, connect, and replace
the terminals according to the connections to
be made. To make the connections do not
remove the system board from the front
panel
but
just
remove
the
insertion
connectors.
H
jumper for internal heating circuit
L
jumper for backlighting circuit
TBE2
terminals for connection of an additional
power source for the backlighting of this
expansion unit and any others following the
power supply capacity
TBE3
terminals block for the Twilight service keys
backlighting when controlled by the relay 2 of
the AA-550 base system and redistribution of
the command to the eventually AA-516R
expansions present in the plant
For details of the connection of the signals on
terminal block TBE2, see section 8.5.7
For details of the connection of the signals on
terminal block TBE3, see section 8.5.7