DDRC420FR V2 | 4 Channel Relay Controller

Dynalite DDRC420FR - 4 x 20A Relays Controller (feed through) 

The Dynalite DDRC420FR is a 4-channel, 20-amp relay controller — the simplest way to think of it is as a four-pole contactor that takes its instructions from your automation system. It mounts on the DIN rail in your switchboard, sitting beside the circuit breakers feeding the lights or loads it controls. Power comes in to each channel, power goes out to the circuit, and the relay inside either passes the supply through or breaks it depending on what your scenes, schedules and sensors are asking for.

Because the design is feed-through, wiring it up feels familiar to any sparky — Line In, Line Out, on each of the four channels — and each channel is fully independent. That means one DDRC420FR can switch four totally different circuits: bathroom exhaust fans, garage lights, an outdoor floodlight, and a pump, for example, with each one responding to its own command from the network.

It's built to handle real-world loads. The 20A relays are happy with all common switched loads up to 20A inductive — LED downlights, fluorescent fittings with electronic ballasts, incandescent and halogen, motors, contactor coils, and so on — making it as much at home in a tricky old building as in a brand-new commercial fitout.

A small but important touch: every channel has a manual override switch on the front panel, with a visual indicator showing whether the channel is currently on or off. So if there's ever a power-up, a network issue, or simply a sparky on site who needs to test a circuit, you don't need a laptop or a PC — just flick the switch.

In an automation system, the DDRC420FR is typically your "switching layer" for any circuit that doesn't need dimming — exhaust fans, exterior lighting, signage, pumps, heaters, water features, garden lights — sitting alongside dimmers like the DDBC1200 or relay banks like the DDRC1220FR-GL to give you full control of the building from one DyNet network. Once it's commissioned in EnvisionProject, every wall panel, sensor, time clock and touchscreen in your system can drive these four outputs.