VPS-100US-120 — VESDA power-limited power supply with housing, 120 VAC input, providing regulated 24 VDC operating power and battery backup for VESDA laser smoke detectors.
The VPS converts a 120 VAC / 60 Hz mains input into 24 VDC power-limited outputs and includes the battery charger that supervises and maintains the standby batteries. It is intended for applications requiring UL listing for fire protection signalling, and must be installed in accordance with the National Electric Code (NFPA 70) and local regulations. Supervision covers AC failure, low AC input (brown-out) and battery condition, and the unit switches over to standby battery automatically when AC fails. A common trouble relay reports AC input loss, low AC input voltage, loss of battery voltage, a short circuit of the battery leads, and a short circuit of any of the DC power outputs. The assembly is three parts — mounting enclosure, transformer and main circuit board — and takes two backup batteries, supplied separately.
Specifications
| Order code |
VPS-100US-120 — the XXX field in VPS-100US-XXX specifies input voltage; 120 denotes 120 VAC |
| Input |
120 VAC / 60 Hz; 1.4 A max |
| Output |
27.6 VDC nominal, 1.5 A max |
| Max output current, single 24 VDC output |
1.2 A |
| Max output current, all three 24 VDC outputs used |
0.500 A per output |
| Dimensions (W x H x D) |
13.9 in x 9 in x 4.5 in |
| Weight |
10 lb without batteries |
| Operating temperature |
Power supply ambient 32°F to 120°F |
| Humidity |
10% to 95% RH, non-condensing |
| Trouble relay |
Common trouble relay rated 2 A at 30 VDC, Form C (NO/NC); energized during normal operation |
| Batteries required |
Two sealed lead acid 12 VDC, 12 Amp-hour — order VBT-012, minimum of 2; supplied separately |
| Cable access |
1 inch knockouts in various positions |
| Cable termination |
Screw terminal blocks, 30 to 12 AWG |
| Detector capacity |
1 LaserPLUS or LaserSCANNER; or 1 LaserFOCUS-500; or 2 LaserFOCUS-250; or 2 LaserCOMPACT; or up to 5 remote (single box) units; or 1 subrack assembly |
| Listing |
UL 1481 listed |
| Supervision and charging |
Filtered and electronically regulated output; AC fail and brown-out supervision; battery supervision; built-in charger for sealed lead acid or gel-type batteries; automatic switchover to standby battery on AC failure; AC input LED indicator |
Installation notes
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The suffix is the mains voltage: VPS-100US-120 is the 120 VAC unit and VPS-100US-220 the 220 VAC unit. The data sheet treats input voltage as a field of the part number, so it is an ordering decision, not a site setting.
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Budget per output, not per supply: total available current is 1.5 A. One output on its own may draw 1.2 A, but as soon as all three 24 VDC outputs are in use each is capped at 0.500 A. Size the detector load against the per-output figure.
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Capacity depends on which detector: the same supply carries one LaserFOCUS-500 but two LaserFOCUS-250, and one LaserPLUS or LaserSCANNER. Count detectors by model, not by quantity.
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Batteries are not included: two VBT-012 sealed lead acid 12 V / 12 Ah batteries are the stated minimum and are ordered separately.
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Code compliance: installation must follow NFPA 70 and any local regulations; refer to the wiring diagrams in the data sheet for assembly.
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Trouble relay is normally energized, so a complete loss of supply reports as a trouble at the panel, which is the intended fail-safe behaviour.
Related models
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VPS-100US-220 — the same supply configured for a 220 VAC input.
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VPS-300US-XXX — one VPS-100US power supply plus a VBC-001 battery cabinet; together they hold up to 6 batteries and power up to 3 LaserPLUS or LaserSCANNER detectors, 3 LaserFOCUS-500, 6 LaserFOCUS-250, or up to 15 remote units.
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VBC-001 — battery cabinet, 6 lb without batteries.
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VBT-012 — sealed lead acid battery, 12 VDC, 12 Amp-hour.
Specifications taken from the Gamewell-FCI (Honeywell) VESDA Power Supply data sheet, document 13986_00, part 18624, revision 5. Manufacturer specifications are subject to change without notice.
