The City Theatrical WDS 5520 is a single-channel, wireless DMX dimmer designed to provide flexible and reliable control of lighting fixtures without the constraints of physical data cabling. This system is particularly valuable in theatrical, live event, and architectural lighting applications where running control wire to a fixture is impractical, expensive, or impossible. The unit combines a robust 15-amp triac-based dimmer with an integrated wireless DMX receiver that operates on the globally available 2.4 GHz ISM band. It receives standard DMX512 control signals transmitted from a compatible wireless DMX transmitter, translating them into precise, flicker-free dimming curves for incandescent, LED, or other resistive loads. This enables lighting designers to place fixtures in dynamic locations—such as moving set pieces, aerial rigs, temporary installations, or hard-to-wire architectural features—while maintaining full, responsive dimming control from the main lighting console.

The system is engineered for performance and ease of integration. The dimmer module itself provides professional-grade electrical specifications, including a high off-state impedance to prevent ghosting, soft-start circuitry to extend lamp life, and advanced thermal management. The wireless component utilizes frequency-hopping spread spectrum (FHSS) technology to ensure a stable, interference-resistant link in crowded RF environments typical of theaters and events. Setup involves pairing the receiver with a transmitter, assigning a DMX start address via DIP switches or software, and connecting the fixture's power. Once configured, it operates transparently as a standard DMX dimmer channel, allowing designers to use their existing console programming without modification.

Housed in a compact, UL-listed enclosure suitable for permanent installation or portable use, the WDS 5520 is built for the demanding environments of professional entertainment. It features standard electrical connections (like NEMA 5-15 or terminal blocks) for power in and fixture out, and may include status LEDs for power, link, and DMX activity. By eliminating the need for a physical DMX cable run, this wireless dimmer system offers significant cost savings in labor and materials for installations and provides unparalleled creative freedom for dynamic lighting design, all while maintaining the reliability and control precision expected in professional lighting.