.svg?v=180920048278408794651747892223){kind=small}
PAD-4-9A | Siemens 9 Amp 24V Distributed Power Supply and NAC Expander for Fire Alarm Systems
- Regular price
- $1,352.00
- Sale price
- $1,352.00
- Regular price
-
Couldn't load pickup availability
Do you need help?
Product Description P/N: PAD-4-9A
Description
The Siemens PAD-4-9A is a distributed power supply and NAC (Notification Appliance Circuit) expander designed to enhance Siemens fire alarm control panels by providing additional 24 V DC power for signaling devices. This model delivers up to 9 amps of total output power, supporting both audible and visual notification appliances compliant with ADA standards. Its fault-tolerant circuitry ensures consistent operation, making it ideal for large commercial, industrial, and institutional fire alarm installations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Siemens |
| Category | Fire Safety |
| Part Number | PAD-4-9A |
| Subcategory | NAC Power Expander |
| Output Voltage | 24 V DC regulated |
| Total Output Power | 9 A maximum |
| Auxiliary Output | 3 A @ 24 V DC |
| NAC Circuits | 4 × Class B (Expandable to Class A with PAD-4-CLSA) |
| Inputs | 2 × optically isolated NAC inputs |
| Supervisory Relays | Form C (General Trouble and AC Fail) |
| Battery Capacity | Up to 7 Ah internal; larger capacities supported with optional kits |
| Operating Voltage | 120 VAC, 50/60 Hz |
| Output Regulation | Independent of primary power fluctuation |
| Certifications | UL 864 10th Edition, ULC-S527, ADA Compliant |
| Enclosure Material | Red powder-coated steel |
| Mounting | Wall-mounted enclosure |
| Production Status | Active |
| Weight | 5 lbs |
Information About PAD-4-9A
The PAD-4-9A is part of Siemens’ advanced Distributed Power Supply (PAD) Series, built to expand the power and signaling capacity of Siemens FireFinder and other compatible FACPs. It provides four Class B NAC outputs (expandable to Class A with the PAD-4-CLSA module) and a 3 A auxiliary output for auxiliary equipment such as door holders and relays. The unit features integrated supervision for AC loss, ground faults, and battery conditions, ensuring reliable fault reporting through Form C relays. Engineered for long-term performance, the PAD-4-9A maintains a regulated 24 V DC output independent of power source fluctuations, ensuring stable device operation across extended wiring runs.
Key Features:
- High NAC Power Output: Provides up to 9 A of 24 V DC power for notification appliances.
- Multiple Circuit Configurations: Supports four Class B circuits, expandable to Class A using the PAD-4-CLSA option.
- Auxiliary Power Supply: Delivers 3 A of 24 V DC power for auxiliary devices such as relays and door holders.
- Supervised Inputs and Outputs: Monitors AC power, batteries, ground faults, and output integrity through Form C relays.
- Optically Isolated NAC Inputs: Ensures reliable signal separation and prevents cross-interference with the main panel.
- Integrated Strobe Synchronization: Supports synchronization modules for consistent strobe operation across zones.
- Durable Enclosure Design: Housed in a red, metal enclosure with space for power boards and batteries up to 7 Ah or larger.
- Seismic and Safety Certifications: Complies with UL 864 10th Edition, ADA, and IBC/OSHPD seismic standards.
The PAD-4-9A delivers the reliability and precision required for critical fire alarm power distribution and signaling system expansion.
Description
The Siemens PAD-4-9A is a distributed power supply and NAC (Notification Appliance Circuit) expander designed to enhance Siemens fire alarm control panels by providing additional 24 V DC power for signaling devices. This model delivers up to 9 amps of total output power, supporting both audible and visual notification appliances compliant with ADA standards. Its fault-tolerant circuitry ensures consistent operation, making it ideal for large commercial, industrial, and institutional fire alarm installations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Siemens |
| Category | Fire Safety |
| Part Number | PAD-4-9A |
| Subcategory | NAC Power Expander |
| Output Voltage | 24 V DC regulated |
| Total Output Power | 9 A maximum |
| Auxiliary Output | 3 A @ 24 V DC |
| NAC Circuits | 4 × Class B (Expandable to Class A with PAD-4-CLSA) |
| Inputs | 2 × optically isolated NAC inputs |
| Supervisory Relays | Form C (General Trouble and AC Fail) |
| Battery Capacity | Up to 7 Ah internal; larger capacities supported with optional kits |
| Operating Voltage | 120 VAC, 50/60 Hz |
| Output Regulation | Independent of primary power fluctuation |
| Certifications | UL 864 10th Edition, ULC-S527, ADA Compliant |
| Enclosure Material | Red powder-coated steel |
| Mounting | Wall-mounted enclosure |
| Production Status | Active |
| Weight | 5 lbs |
Information About PAD-4-9A
The PAD-4-9A is part of Siemens’ advanced Distributed Power Supply (PAD) Series, built to expand the power and signaling capacity of Siemens FireFinder and other compatible FACPs. It provides four Class B NAC outputs (expandable to Class A with the PAD-4-CLSA module) and a 3 A auxiliary output for auxiliary equipment such as door holders and relays. The unit features integrated supervision for AC loss, ground faults, and battery conditions, ensuring reliable fault reporting through Form C relays. Engineered for long-term performance, the PAD-4-9A maintains a regulated 24 V DC output independent of power source fluctuations, ensuring stable device operation across extended wiring runs.
Key Features:
- High NAC Power Output: Provides up to 9 A of 24 V DC power for notification appliances.
- Multiple Circuit Configurations: Supports four Class B circuits, expandable to Class A using the PAD-4-CLSA option.
- Auxiliary Power Supply: Delivers 3 A of 24 V DC power for auxiliary devices such as relays and door holders.
- Supervised Inputs and Outputs: Monitors AC power, batteries, ground faults, and output integrity through Form C relays.
- Optically Isolated NAC Inputs: Ensures reliable signal separation and prevents cross-interference with the main panel.
- Integrated Strobe Synchronization: Supports synchronization modules for consistent strobe operation across zones.
- Durable Enclosure Design: Housed in a red, metal enclosure with space for power boards and batteries up to 7 Ah or larger.
- Seismic and Safety Certifications: Complies with UL 864 10th Edition, ADA, and IBC/OSHPD seismic standards.
The PAD-4-9A delivers the reliability and precision required for critical fire alarm power distribution and signaling system expansion.
