Siemens PAD-4-6A is the 6 amp PAD-4 Distributed Power Supply kit: a PAD-4-ENCL red enclosure, PAD-4-MB main board and 170 W FP2011-U1 power supply. PAD-4 is a notification appliance circuit (NAC) extender with a built-in auxiliary power output for Siemens fire alarm control panels.
The unit adds power for audible and visible appliances away from the main panel. It holds a steady 24 VDC on each NAC regardless of primary or secondary power fluctuations, which allows longer wire runs. Two input circuits control the four outputs, and outputs can be set for steady, synchronized strobe, Temporal 3 or Temporal 4 operation.
Specifications
| Total output |
24 VDC at 6 A (FP2011-U1) |
| NACs |
4 Class B or 2 Class A; 3 A per circuit max |
| Auxiliary output |
1 circuit, 3 A max |
| Inputs |
2 Class B or 2 Class A supervised, 16-33 VDC |
| Battery charging |
Up to 18 Ah; up to 7 Ah in enclosure |
| Trouble contacts |
Form C trouble; Form A AC fail; 2 A at 30 VDC |
| Enclosure |
Red, 13.5 x 18.75 x 3.25 in |
| Environment |
Indoor dry, 32 to 120°F, up to 93% RH |
| Agency |
UL 864 9th Ed., UL 1481, FM, CSFM |
Installation notes
- Optional PAD-4-CLSA card adds two more Class A outputs.
- An input can silence horns on Siemens AS, NS or ZH series horn/strobes while strobes stay active.
- Firmware and diagnostics are available with the PAD-4-FDT tool and PAD-4-LUA USB adapter.
- Seismic certified per ASCE 7 and OSHPD pre-approved (OSP-0057-10).
Related models
- PAD-4-9A: 9 A kit with 300 W FP2012-U1 supply
- PAD-3: earlier distributed power supply unit
Documents
FAQ
What is included in the PAD-4-6A kit?
Siemens lists the 6A PAD-4 kit (S54339-A1-A1) as one PAD-4-ENCL enclosure, one PAD-4-MB main board and one 170 W FP2011-U1 power supply.
How much power does it supply?
24 VDC at 6 A total with the FP2011-U1, up to 3 A per NAC, plus one 3 A auxiliary circuit within the 6 A total.
Does it support Class A NACs?
Yes. It provides four Class B or two Class A NACs; the optional PAD-4-CLSA module converts the outputs to four Class A NACs.
What battery size does it support?
The charger handles batteries up to 18 Ah. The PAD-4 enclosure holds up to 7 Ah; larger sets need a System 3 or separate UL certified battery enclosure.
