Voice Operated Relay

The RDL ST-VOX1 is a voice-operated relay designed to control switching from either microphone-level or line-level signals. Its core controls and outputs include precise threshold adjustment, DPDT switching contacts, and an open-collector SLAVE output. This focused combination allows the ST-VOX1 to detect the supplied voice signal and provide the specified switching interfaces without limiting the source to a single audio signal level.

Ideal Use Cases

The ST-VOX1 is suited to audio and control systems in which switching must be initiated by a voice signal. It can be incorporated into microphone-level installations as well as systems that provide a line-level signal. This makes it applicable when an integrator needs the same relay model to work with either of the two stated signal levels. It is also appropriate for designs that specifically require DPDT switching contacts or an open-collector SLAVE output as part of the control arrangement.

Why Choose This Model

This model brings its principal control functions together in a purpose-built voice-operated relay. Support for mic and line-level signals gives the installer two documented source options. Precise threshold adjustment provides control over the level at which voice-controlled switching is initiated. The DPDT contact configuration supplies the specified relay switching format, while the open-collector SLAVE output offers an additional output type for systems designed to use it. These features are clearly defined without relying on undocumented processing modes or connectivity.

Installation and Integration

Integration planning begins with the available audio source. The ST-VOX1 can receive switching control from a microphone-level or line-level signal, so the selected source should be matched to one of those supported levels. Once the signal path is established, the threshold adjustment can be set for the required switching point. The DPDT contacts can then be incorporated into the intended control circuit, subject to the electrical requirements documented for the complete installation.

For systems that call for a separate open-collector control connection, the SLAVE output is available alongside the relay contacts. The source data also lists an ST-VOX1 specification sheet in PDF format, an engineering functional block CAD file, and front and end panel diagrams in American DXF format. These resources can support system documentation and panel planning. Recommended power supplies are the PS-24AS for USA use and the PS-24AX for international use. The recommended power supply is not included.

Performance Highlights

The ST-VOX1 centers its performance on five documented functions: voice-signal-controlled switching, operation from mic-level signals, operation from line-level signals, precise threshold adjustment, and DPDT relay contacts. The open-collector SLAVE output expands the available control-output choices beyond the contact set. Together, these elements define a direct sequence from audio signal detection and threshold setting to relay or SLAVE output use. Contact ratings, response timing, power consumption, dimensions, and operating limits are not specified in the supplied product data and should be confirmed from the linked specification sheet when required for a design.

What Makes It Different

The distinguishing feature of the ST-VOX1 is the concentration of voice-controlled switching functions in one model. It is not restricted to only a microphone-level or only a line-level source; both signal levels are identified as supported switching inputs. Precise threshold adjustment gives the user a defined method for setting activation sensitivity. DPDT switching contacts provide the specified relay format, and the open-collector SLAVE output gives system designers another documented way to use the detected switching state. This combination is the practical difference presented by the available source information.

Final Assessment

The RDL ST-VOX1 is a focused choice for installations requiring relay switching controlled by a voice signal. Its support for mic and line-level sources, adjustable threshold, DPDT contacts, and open-collector SLAVE output provides a clearly documented set of integration features. With USA and international recommended power-supply options identified and technical documentation available, the model gives integrators the essential information needed to evaluate it for compatible audio-triggered control systems while leaving project-specific electrical ratings to the official specification sheet.