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ACom6
15
(12/99)
At the connections Alarm
IN 0-3
, you will find four potential-free alarm inputs. The poten-
tial-free alarm inputs are galvanically separated (by optical couplers) from the other
ACom components and thus give you the greatest possible protection from outside in-
terference. They need a direct voltage between 5 and 12 V. When connecting the alarm
inputs, please make sure that you are connecting the polarry correctly.
Alternatively, there are four potential-linked alarm inputs at the connections Alarm
IN 4-7
.
Here, you may connect switches or closing contacts directly without the need for any
separate power supply. Connect the respective input and the common ground.
z
Attention!
In cases of galvanic separation by optical couplers a common ground should
under no circumstances be used. External voltage must not exceed 12 V. En-
sure correct polarity.
• Remove terminal block from socket.
• Put conductors to the terminals in strict compliance with their polarity. Ensure correct
assignment (+. –.
⊥
)
• Insert terminal block in socket.
• Lead cable around the pivot several times (to reduce tensile loads and stresses).
Connection Outputs
The ACom is equipped with two relay outputs (Rel1 and Rel2) for the connection of exter-
nal appliances such as lamps or alarm sirens. The relays function as throw-over switches
and the symbols
Open
,
Closed
at the screw terminals each refer to the resting state.
z
Attention!
The relay contacts can operate at maximum loads of 24 V, 0.5 A each.
• Remove terminal block from socket.
• Connect the contacts in the middle and to the left. The relay functions as normally
close.
or
Connect the contacts in the middle and to the right. The relay functions as normally
open.
• Insert terminal block in socket.
• Lead cable around the pivot below the screw terminals several times (to reduce tensile
loads and stresses).
Assembly