4 Channel Remote Control for ST-SX4

The RDL D-RC4ST is a dedicated four-channel remote control for the RDL ST-SX4. It provides remote selection of four unbalanced audio sources, with a separate momentary pushbutton for each channel and a red LED for each selected-channel indication. Its 3-conductor remote wiring, detachable terminal-block connection, and standard electrical-box mounting suit fixed audio installations where source selection is needed at a convenient control location.

Ideal Use Cases

This model fits ST-SX4 systems that require straightforward access to four source choices. Each source has its own button, so users can select a channel directly instead of stepping through the available inputs. Four individual red LEDs indicate the selected channel. The D-RC4ST is especially applicable when the ST-SX4 and its control point are in different locations because source selection is carried over remote wiring. It is specifically intended for the remote selection of unbalanced audio sources and is designed as a companion to other RDL remote controls.

Why Choose This Model

The operating interface consists of four momentary pushbuttons and four red LED indicators. With one pushbutton assigned to each channel, the control surface remains focused on its primary function: selecting one of four audio sources. The D-RC4ST interfaces directly with the RDL ST-SX4 through a detachable terminal block, establishing a clearly specified connection between the controller and source selector. Its professional aesthetic appearance is also appropriate for installations where the control hardware remains visible. For an ST-SX4 installation, the D-RC4ST supplies the matching remote-selection function specified by RDL.

Installation and Integration

The D-RC4ST uses 3-conductor remote wiring and connects through a detachable terminal block that interfaces directly with the ST-SX4. Its electrical requirement is ground-referenced 24 Vdc at 30 mA. The recommended power supplies are the RDL PS-24AS for the USA and the PS-24AX for international applications. The controller mounts in a standard US electrical box or in RDL WB- or SMB-series boxes. A cover plate is available separately, so it should be accounted for when planning the finished installation.

The specified ambient operating environment is 0° C to 55° C. Package dimensions are 3.625 x 4.625 x 2.125 inches, with a shipping weight of 0.375 pounds. The listed WEEE weight is 0.22 pounds, and the package type is a cardboard box.

Performance Highlights

Performance centers on direct, channel-specific control. Each of the four momentary pushbuttons corresponds to one channel, while the four red LEDs provide selected-channel indication. The arrangement combines source selection and status indication on the same remote control. Because the D-RC4ST is specified for unbalanced audio source selection and direct ST-SX4 interfacing, its role in the system is clearly defined. The 24 Vdc at 30 mA power requirement and 0° C to 55° C operating range provide concrete parameters for system design.

What Makes It Different

The D-RC4ST brings together direct ST-SX4 compatibility, one-button selection for each of four sources, individual red channel indicators, and 3-conductor remote wiring. It is not presented as an unspecified universal control; the supplied connection information identifies the ST-SX4 as its direct interface. RDL also identifies it as a companion to its other remote controls, supporting its use within an RDL control installation. Available engineering resources include a PDF specification sheet, American DXF engineering functional-block information, American DXF front and rear panel diagrams, and high-resolution imagery in TIF format.

Final Assessment

For an RDL ST-SX4 system requiring remote control of four unbalanced audio sources, the D-RC4ST provides the specified selection interface in a compact installation format. Four momentary pushbuttons provide individual source access, four red LEDs indicate the selected channel, and the detachable terminal block supports direct integration with the ST-SX4. Its standard electrical-box mounting and defined power and environmental requirements make installation planning straightforward. Buyers should include the separately available cover plate and select the recommended regional power supply when specifying a complete installation.