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TEMA TELECOMUNICAZIONI SRL
Doorphone AA-550
MAS-AA550-REV07EN
Page 28 of 67
8.4. Description of the terminal blocks of relays
The circuits related to the relay 1 and relay 2 are equivalent but electrically separate and distinct. Each relay
provides one normally open contact "NO" that can be activated in closing. The operating mode of the two relays is
configured by setting some system parameters and is explained later in this manual.
The terminals are removable for convenience and ease of wiring. The two relays are both programmable and
usable to perform the opening of two different gates, while their additional functions in addition to the door opening
function, are different.
The blocks of terminal connections of the relays are arranged in the same way. This means that if there is the
need to swap the loads driven by the system after having made connections on TB1 and TB3, simply swap the
removable terminal block TB1 and TB3. Doing that, it is not required to reconnect in a different way as already
previously connected.
As described for the terminal block called TB1 (terminal block of relay1) therefore applies also to the block called
TB3 (terminal block of the relay2). Below is drawn the existing electrical connection on the AA-550 system board
for each block.
TB1 1-2
Pair of terminals to redistribute the power source to other parts of the system
without having to connect two wires in the same terminal.
TB1 3-4
Pair of terminals to connect the power source for the load to activate with the
internal system relay.
TB1 5-6
Pair of terminals where is connected the load driven by the internal relay of
the AA-550 system. The maximum load capacity of the relay contact is 30V 2A.
TB3 5-6
Pair of terminals where is connected the load driven by the internal relay of
the AA-550 system. The maximum load capacity of the relay contact is 30V 2A.
TB3 3-4
Pair of terminals to connect the power source for the load to activate with the
internal system relay.
TB3 1-2
Pair of terminals to redistribute the power source to other parts of the system
without having to connect two wires in the same terminal.