TEMA TELECOMUNICAZIONI SRL
Doorphone AA-550
MAS-AA550-REV07EN
Page 26 of 67
8.3.2. Connecting the system expansion AA-516P and AA-516K
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
FC
polarized connector for connection of the
expansion coming from AA-550 system
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 TBE3, see section 8.5.7
