matrix M12 to RJ11 cable / B4

What This Cable Does

The Matrix M12 to RJ11 Cable / B4 is a dedicated adapter cable within the Matrix M12 cable ecosystem. One end terminates in a screw-locking M12 connector that seats and locks mechanically into the control port on Matrix LED and hybrid fixtures. The other end terminates in an RJ-style plug that connects to the dimming or scheduling port on a compatible lighting controller. The result is a single, reliable physical link between your fixture array and your controller — no adapters, no improvised wiring.

Matrix fixtures use 0-10V signaling for dimming and on/off control. This cable carries that low-voltage signal cleanly between the controller and the fixture. In multi-fixture rooms, you run one cable from the controller to the first fixture in a zone, then use daisy-chain cables (Matrix A3 or A4, sold separately) to continue the signal down the row. The B4 is the entry point into that chain — the controller-to-fixture first leg.

Where It Fits in a Commercial Build

Any commercial cultivation room running Matrix LED or hybrid fixtures and a 0-10V-compatible lighting controller will need at least one of these cables per control zone. Whether you're running a Matrix MC2 or a third-party controller with an RJ-style output port, the B4 handles the signal handoff at the controller end.

In a standard commercial bay layout — fixtures hung overhead, controller mounted on the wall or in a control panel — the 10ft length handles most controller-to-first-fixture runs cleanly without excess slack. If your controller is farther from the fixture array, Matrix extension cables (C3/C4 series) can extend the run. The B4 is also the correct first-leg cable when integrating Matrix fixtures into an existing control infrastructure that already uses RJ-style dimming ports.

Build Quality for Grow Environments

The M12 connector family is an industrial-grade standard used precisely because it out-performs friction-fit connectors in demanding environments. The threaded locking collar twists and seats mechanically, so the connection stays established through humidity cycles, incidental cable pulls, and the general physical activity of a working cultivation room. A standard push-fit cable in the same position would work loose; the M12 doesn't.

Construction is rated for the high-humidity, continuous-operation conditions typical in commercial indoor cultivation. The cable jacket and connector bodies are built to handle condensation and the temperature swings that come with environmental control systems cycling on and off around the clock. For a cable that sits in your control infrastructure for the life of the fixture, that durability matters.

Ordering and Compatibility Notes

The B4 is part of Matrix's broader M12 cable lineup, which includes fixture-to-fixture daisy chain cables (A3, A4), extension cables (C3, C4), and the M12 to RJ11 adapter (B3). Each cable type covers a specific connection point in a Matrix system. Confirm which control port your controller uses before ordering — RJ11 and RJ12 plugs share the same 6-position housing and are physically compatible with each other's jacks, but pin count and wiring differ. Contact HSC to confirm the correct B-series cable for your specific controller model.

This cable is a genuine Matrix accessory, SKU 10-010704-381, available through HSC with the same direct account pricing that applies to the full Matrix fixture and accessory line. Request a quote for single-unit or volume orders — HSC serves licensed cannabis and hemp operators nationwide.