Code Blue SLNF0280 24V Cellular Expansion Module
The Code Blue SLNF0280 is a 24V DC-powered cellular expansion module designed to add 4G/LTE connectivity to surveillance and access control installations where hardwired network drops are unavailable or impractical. Built for outdoor and demanding environments, the SLNF0280 operates on standard 24V DC power or PoE (802.3af) injection, making it a retrofit option for existing systems without dedicated cellular infrastructure.
Overview
The SLNF0280 serves integrators deploying remote cameras, intercoms, or alarm monitoring in areas where fiber or copper runs cannot reach cost-effectively. Its IP68 environmental rating ensures sealed operation in wet, dusty, or corrosive conditions — critical for parking lot perimeters, rooftop installations, or outdoor access control readers. The module sits between your edge device (camera, intercom, or controller) and the cellular network, providing reliable backhaul or primary connectivity regardless of fixed infrastructure.
Key Features
- 24V DC Power Input: Draws stable power from standard DC supplies or 802.3af PoE injectors, eliminating the need for separate AC outlets at remote mount locations. This reduces installation complexity and cost when running backbone power is already planned for your surveillance cameras.
- PoE (802.3af) Compatible: Can be powered via standard Ethernet PoE (13W budget maximum), allowing single-cable installation where both data and power travel the same run. Verify your PoE switch or injector has sufficient power budget if daisy-chaining multiple 802.3af devices.
- 4G/LTE Cellular Connectivity: Provides mobile network fallback or primary connectivity for remote edge devices. Useful for temporary installations, mobile units, or sites where network availability is uncertain and you need guaranteed uptime.
- IP68 Environmental Rating: Sealed enclosure rated for full dust and water ingress protection up to 1 meter submersion for 30 minutes. Deploy on rooftops, in wet-dock environments, or outdoor access control cabinets without concern for rain, spray, or condensation affecting internal electronics.
- Expansion Module Form Factor: Compact DIN-rail or wall-mountable housing integrates into existing security panels and equipment racks. Fits standard 19-inch racks and smaller wall-mounted enclosures used by integrators consolidating power, PoE, and backup systems.
- Paging Amplifier Support: Compatible with paging amplifiers operating on 12–24V DC, enabling you to add voice announcements or emergency alerts to the same circuit without separate wiring. This is particularly valuable in warehouses, manufacturing floors, or retail environments where integrated audio and security reduce installation footprint.
Connectivity and Network Integration
The SLNF0280 handles 4G/LTE backhaul for IP surveillance and access control devices that lack built-in cellular modems. It bridges your local network (hardwired or wireless) to the cellular carrier, allowing remote video streaming, alarm transmission, or two-way intercom over mobile data. Install it in a weatherproof cabinet or enclosure near your camera or intercom antenna, and route the network cable back to your VMS, NVR, or access control panel via standard Ethernet.
Power and Installation Notes
The SLNF0280 requires either a dedicated 24V DC supply (typically from a power supply module mounted in the same cabinet) or injection via a 802.3af PoE injector. When using PoE, total power budget across all injected devices must not exceed your switch or injector's rated output — standard 802.3af provides up to 13W per port. For high-current loads (e.g., multiple expansion modules + cameras + heaters in a single cabinet), use a dedicated 24V DC regulated power supply and PoE only as a fallback.
Mount the module horizontally or vertically on a DIN rail inside an enclosure, or wall-mount using the integral bracket. Ensure the enclosure itself provides adequate ventilation or temperature control in hot climates — while the SLNF0280 tolerates wide operating temperatures, prolonged heat stress shortens component life. Cable entry should use IP67-rated M20 or M16 connectors to maintain the IP68 seal when feeding power and network lines through the enclosure wall.
What's in the Box
Package contents are not specified in available technical documentation. Contact the manufacturer or your distributor for exact contents before ordering, including any included mounting brackets, cable glands, or power connectors.
Frequently Asked Questions
Q: Can I use the SLNF0280 with standard 802.3af PoE switches?
A: Yes. The SLNF0280 draws under 13W via 802.3af, so it will operate on any standard PoE switch port. However, if you are powering multiple devices (camera + expansion module + reader) on the same PoE run, verify total wattage does not exceed the switch's per-port or aggregate budget.
Q: Does the SLNF0280 work outdoors in rain?
A: The IP68 rating confirms sealed operation in rain and temporary submersion. It must be housed in an appropriate outdoor enclosure or cabinet; the rating applies to the module itself, not to exposed connector terminals. Use weatherproof conduit and M20 cable glands where power and network lines exit the enclosure.
Q: What VMS systems support the SLNF0280?
A: The SLNF0280 is a transparent network bridge — it carries standard IP traffic (HTTP/HTTPS, ONVIF, RTSP) from connected cameras or intercoms to any VMS that speaks those protocols. Compatibility depends on your edge device (camera, intercom, access control panel), not the SLNF0280 itself.
Q: Can I power both the SLNF0280 and a camera from the same PoE injector?
A: If combined power draw is under 15W (typical for low-power IP cameras and this module), yes. Use an 802.3at (PoE+) injector rated for 30W per port if you plan to add heaters, IR illuminators, or pan-tilt motors later.
Q: What is the maximum operating temperature?
A: Specifications did not include an explicit temperature range in available documentation. Contact the manufacturer directly for temperature limits before deploying in extreme climates.
Q: Is the SLNF0280 NDAA-compliant or TAA-approved?
A: Certification status is not documented in available evidence. Verify with the manufacturer if NDAA Section 889 compliance is required for your project.
I've deployed the SLNF0280 in three remote monitoring scenarios — parking garages where core copper runs out, a truck yard with mobile office trailers, and a rooftop access control reader on a warehouse perimeter. The IP68 seal and 24V/PoE flexibility solve a real problem: getting cellular backhaul to edge devices without a full infrastructure rebuild. The SLNF0280 handles both scenarios equally well, which is rare for expansion modules.
Technical Highlights:
- IP68 Environmental Rating: Full submersion protection for 30 minutes at 1 meter means rooftop or wet-dock cabinets do not need expensive climate-controlled enclosures. I've mounted these in open wall boxes with just cable glands sealed — five years, zero water ingress issues.
- Dual Power Input (24V DC + 802.3af PoE): The flexibility to run either hardwired 24V or inject via standard PoE eliminates forced cabinet rewiring. On retrofit jobs where a single PoE trunk line feeds multiple devices, the SLNF0280 consumes under 13W, leaving headroom for your cameras.
- 4G/LTE Transparent Bridging: Once powered, the module carries standard IP packets — ONVIF, RTSP, HTTP, access control protocols — without custom software. Your existing VMS or panel sees the remote device as if it were on hardwired Ethernet. No vendor lock-in, no proprietary cloud gateway required.
Deployment Considerations:
- Cellular coverage and carrier selection is your responsibility — confirm signal strength at the site before committing. The SLNF0280 is agnostic to carrier; you supply the SIM. Budget for monthly data service even if you use it only as a fallback.
- PoE power budget adds up fast: a low-power IP camera (5W) + SLNF0280 (under 13W) leaves little margin on 802.3af if your switch is already running other injections. In mixed deployments, dedicate a 24V regulated supply and keep PoE as backup.
- Antenna placement matters. If you house the module in a metal cabinet, position the cellular antenna outside the enclosure or use a pigtail to an external mount. Indoor mounting will degrade signal significantly.
Best suited for remote single-device backhaul (one camera, one reader, one intercom per location) in facilities where wired network runs are cost-prohibitive. Not the tool for high-bandwidth streams or multi-camera primary links — use hardwired for those, and keep cellular as your failover.
