{"product_id":"pad-4-9a-siemens-9-amp-24v-distributed-power-supply-and-nac-expander-for-fire-alarm-systems","title":"PAD-4-9A | Siemens 9 Amp 24V Distributed Power Supply and NAC Expander for Fire Alarm Systems","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe 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.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFire Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePAD-4-9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNAC Power Expander\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 V DC regulated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Output Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9 A maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuxiliary Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 A @ 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNAC Circuits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 × Class B (Expandable to Class A with PAD-4-CLSA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × optically isolated NAC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupervisory Relays\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eForm C (General Trouble and AC Fail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 7 Ah internal; larger capacities supported with optional kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 VAC, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Regulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIndependent of primary power fluctuation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL 864 10th Edition, ULC-S527, ADA Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed powder-coated steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall-mounted enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduction Status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eActive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e\n\u003cspan data-sheets-root=\"1\"\u003ePAD-4-9A\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh NAC Power Output: Provides up to 9 A of 24 V DC power for notification appliances.\u003c\/li\u003e\n\u003cli\u003eMultiple Circuit Configurations: Supports four Class B circuits, expandable to Class A using the PAD-4-CLSA option.\u003c\/li\u003e\n\u003cli\u003eAuxiliary Power Supply: Delivers 3 A of 24 V DC power for auxiliary devices such as relays and door holders.\u003c\/li\u003e\n\u003cli\u003eSupervised Inputs and Outputs: Monitors AC power, batteries, ground faults, and output integrity through Form C relays.\u003c\/li\u003e\n\u003cli\u003eOptically Isolated NAC Inputs: Ensures reliable signal separation and prevents cross-interference with the main panel.\u003c\/li\u003e\n\u003cli\u003eIntegrated Strobe Synchronization: Supports synchronization modules for consistent strobe operation across zones.\u003c\/li\u003e\n\u003cli\u003eDurable Enclosure Design: Housed in a red, metal enclosure with space for power boards and batteries up to 7 Ah or larger.\u003c\/li\u003e\n\u003cli\u003eSeismic and Safety Certifications: Complies with UL 864 10th Edition, ADA, and IBC\/OSHPD seismic standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe PAD-4-9A delivers the reliability and precision required for critical fire alarm power distribution and signaling system expansion.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":49105135272192,"sku":"PAD-4-9A","price":1987.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/PR-F1P1-6086_600x600_4986e5aa-003c-4fdf-8b3e-ec9a517290d3.jpg?v=1785540999","url":"https:\/\/alotechparts.com\/products\/pad-4-9a-siemens-9-amp-24v-distributed-power-supply-and-nac-expander-for-fire-alarm-systems","provider":"Alo Tech Solutions","version":"1.0","type":"link"}