Siemens PAD-3 Installation, Operation And Maintenance Manual page 35

Distributed power module nac expander
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Fire Control Unit
Notification
Fire Alarm
Circuit
Zone
+ -
1+ 1-
Figure 4-7. Multiple PAD-3s activated by a single notification circuit
CAUTION: For system supervision,
DO NOT USE LOOPED WIRE UNDER TERMINALS.
Break wire run to provide supervision of connections.
Trouble contacts
monitored by
FACP zone
PAD-3
PAD-3
1+ 1-
NC
COM
Two Separate
Looping
Wires
Single Wire
Incorrect
Correct
PAD-3
1+ 1-
NC
COM
31
Twisting
Two Wires
Incorrect
NC
COM
EOL of Trouble
Contact from FACP
P/N 140-820405
24K EOL of
NAC Circuit

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