Siemens PAD-4-MB — main circuit board of the PAD-4 distributed notification and auxiliary power expander, giving up to 9 A of 24 VDC across four notification appliance circuits.
A control unit can only source so much notification power itself. The PAD-4 sits out near the load with its own AC feed, charger and batteries, follows the panel NAC by polarity, and reports faults back through it.
- Four power-limited NACs, wired as four Class B (Style Y) or two Class A (Style Z); the optional PAD-4-CLSA adds two more
- 3 A per output, but all four NACs plus the auxiliary output cannot exceed 6 A on the FP2011-U1 supply or 9 A on the FP2012-U1
- Two optically isolated inputs, 24 VDC nominal, 7 mA max
- Power-limited 24 VDC auxiliary output, 3 A maximum
- ANSI temporal, synchronised strobe and horn, or carbon monoxide patterns, set on a 10-position DIP switch
- UL 864 and UL 1481 certified, ULC S527 compliant; 32–120°F
This is the board alone: the PAD-4-ENCL enclosure, the FP2011-U1 or FP2012-U1 power supply and the PAD-4-CLSA module are separate, and J2 ships jumpered for ULC and is removed for UL.
Documents
FAQ
Does the PAD-4-MB include the enclosure and power supply?
No. It is the main board only. The PAD-4-ENCL enclosure and the FP2011-U1 (170 W) or FP2012-U1 (300 W) power supply are separate, or order a complete PAD4-6A or PAD4-9A kit.
How much notification power can it deliver?
Total output is 6 A with the FP2011-U1 or 9 A with the FP2012-U1, at up to 3 A per output.
Can it drive Class A circuits?
Its four NACs wire as four Class B or two Class A circuits. The optional PAD-4-CLSA Class A adapter card adds Class A capacity.
What battery size fits?
The PAD-4 enclosure has room for batteries up to 7 AH. Larger sets must be housed in a System 3 enclosure or a separate certified battery enclosure.
