Altronix EFLOW3NBV 12/24VDC Selectable Power Supply Board — 220VAC Input
Overview
The Altronix EFLOW3NBV is a compact, field-selectable DC power supply board designed for international security installations running on 220VAC mains. It delivers either 12VDC or 24VDC at up to 2A continuous — enough to drive a standard IP camera, access control panel, or door hardware without requiring a dedicated transformer in markets where 220V is the norm. If you're deploying Altronix power solutions in EU, Middle East, or Asia-Pacific sites, the EFLOW3NBV is purpose-built for that voltage environment rather than adapted from a North American design.
The board form factor keeps the footprint minimal at 7.5" x 4.6" x 1.75", making it straightforward to integrate inside a standard enclosure alongside an access controller or NVR. CE listing confirms it meets European conformity requirements for electrical safety and EMC — a non-negotiable for commercial installations in most international markets.
Key Features
- Selectable 12VDC or 24VDC Output: A single board covers both common security device voltages. Choose 12VDC for standard IP cameras and readers, or 24VDC for locks, panels, and devices that require the higher rail — without stocking two separate SKUs for international jobs.
- 2A Continuous Output Current: At 2A, this supply comfortably powers a single IP camera (typically 0.5–1A at 12V) or a 24VDC electric strike alongside a reader. Plan loads conservatively — 2A is the rated ceiling, not a headroom figure.
- 1A Auxiliary Unswitched Output: The aux rail runs continuously regardless of main output state. Use it for a backup signaling device, tamper circuit, or low-draw sensor that needs constant power independent of the primary load switching.
- 220VAC Input with Wide Tolerance Range (198–256VAC): The ±13% input tolerance absorbs the voltage sag common on commercial grid feeds in developing markets. A nominal 220V site that dips to 205V under load won't drop the supply offline.
- 50/60Hz Dual-Frequency Operation: Works on both 50Hz (Europe, Asia, Middle East) and 60Hz (parts of South America, some Asian markets) grid infrastructure — one part number covers a wider range of international deployment scenarios.
- 5A/250V Input Fuse + 3A/32V Battery Fuse: Factory-fitted overcurrent protection on both the AC input and battery circuit. The separate battery fuse at 3A/32V means a battery fault won't take down the input stage, and vice versa — important for systems where battery backup is part of the design.
- CE Agency Listing: Confirmed CE conformity makes this suitable for installations in the European Economic Area and many markets that accept CE as an approval basis. Check local AHJ requirements — CE covers the board, not any enclosure you add.
- Compact Board Dimensions (7.5" x 4.6" x 1.75"): Fits inside standard Altronix enclosures designed for power distribution boards. The 0.7 lb product weight keeps the overall enclosure assembly manageable for single-person mounting.
- Operating Temperature 0°C to 49°C (32°F to 120°F): Rated for conditioned mechanical rooms and locked electrical closets. It is not rated for outdoor ambient exposure — plan an enclosure with appropriate thermal management if the installation space runs warm.
- Low Thermal Output: At 12VDC the board dissipates only 12 BTU/Hr; at 24VDC, 25 BTU/Hr. Neither figure will meaningfully stress a sealed enclosure's thermal budget, even in a compact wall-mount cabinet.
Integration & Compatibility
The EFLOW3NBV is a board-level component, not a standalone boxed supply — it is intended to be mounted inside a compatible security power supply enclosure. Verify that your chosen enclosure accommodates a 7.5" x 4.6" board footprint. The selectable output voltage pairs naturally with 12V or 24V IP cameras, access control readers, and electric locking hardware commonly found in international commercial deployments. The unswitched 1A auxiliary output can support a tamper detection circuit or a low-draw sensor on a separate rail without additional switching hardware.
Battery backup integration is supported via the onboard 3A/32V battery fuse — pair with an appropriately rated sealed lead-acid battery for standby capability. Confirm battery and load calculations before specifying; the 2A main output ceiling applies to the total connected load, not each output independently if you are drawing from both rails simultaneously.
Frequently Asked Questions
Q: Can the EFLOW3NBV be used on a 110VAC or 120VAC circuit?
A: No. The EFLOW3NBV is designed for 220VAC input with a rated range of 198–256VAC. It is not suitable for North American 110/120VAC mains. For 120VAC applications, a different Altronix model in the EFLOW family is required.
Q: How do I select between 12VDC and 24VDC output on the EFLOW3NBV?
A: Output voltage is field-selectable on the board. Refer to the Altronix installation sheet for the specific jumper or switch position — set the voltage before connecting any load, and confirm your connected devices match the selected rail before powering up.
Q: Does the EFLOW3NBV include an enclosure?
A: No. The EFLOW3NBV is a board-level power supply (7.5" x 4.6" x 1.75") intended for installation inside a compatible Altronix enclosure. It does not ship in a standalone housing.
Q: What is the maximum continuous load I can connect to the EFLOW3NBV?
A: The main DC output is rated at 2A continuous maximum. The auxiliary unswitched output provides an additional 1A. Do not exceed these ratings — size your load budget at 80% of rated capacity (1.6A on main, 0.8A on aux) for reliable long-term operation.
Q: Is the EFLOW3NBV CE listed?
A: Yes. The EFLOW3NBV carries CE agency listing, confirming it meets European conformity requirements for electrical safety and EMC. Verify with your local authority having jurisdiction whether CE listing satisfies all applicable regional requirements for your installation.
Q: Can the EFLOW3NBV support battery backup?
A: Yes. The board includes a dedicated 3A/32V battery fuse for battery backup integration. Select a sealed lead-acid battery rated for your required standby duration and ensure the total load does not exceed the 2A main output ceiling.
The EFLOW3NBV is Altronix's answer to a real gap in international project kits: a CE-listed, board-level supply that accepts 198–256VAC and outputs selectable 12 or 24VDC at 2A — all in a 7.5" x 4.6" footprint that drops into a standard Altronix enclosure without custom fabrication. When I'm speccing power for a 220V-grid site, having one board that covers both voltage rails eliminates the need to carry two part numbers for mixed-device deployments.
Technical Highlights:
- Wide AC Input Tolerance (198–256VAC): A ±13% window around nominal 220V means grid sag on commercial feeds in the Middle East or Southeast Asia won't nuisance-trip the supply. That's a real-world advantage over supplies rated only at nominal voltage.
- Dual Thermal Profile (12 BTU/Hr at 12V, 25 BTU/Hr at 24VDC): Neither figure will stress a sealed cabinet. At 24VDC the heat load is still modest enough that a standard Altronix enclosure handles it without forced ventilation in a conditioned space.
- Separate 3A/32V Battery Fuse: The isolated battery fuse protects the main supply from battery-side faults independently — a detail that matters on installations where the battery circuit is more exposed to environmental stress than the board itself.
Deployment Considerations:
- This is a bare board — you must specify a compatible Altronix enclosure separately. Confirm the enclosure accepts a 7.5" x 4.6" board and has appropriate knockout or conduit access for 220VAC wiring before ordering.
- The 2A continuous output is a hard ceiling, not an engineering headroom figure. On a 24VDC rail driving an electric strike plus a reader, calculate your worst-case inrush and derate to 1.6A steady-state to stay inside the rating under thermal stress.
This board is a strong fit for small international branch office or retail deployments — a single camera or reader plus a door control device on a 220V circuit — where a compact, CE-listed supply installed inside a lockable enclosure satisfies both the electrical and physical security requirements of the AHJ.
