Active Single-Pair Sender-Twisted Pair Format-A-Mini-Jack & Stereo RCA In-Stainless

The RDL DS-TPSL1A is an active single-pair twisted-pair sender for RDL TP Format-A systems. It accepts left and right stereo audio through a mini-jack or dual RCA phono jacks, combines the channels into a mono signal, and feeds a switch-selectable RJ45 pair. Its stainless configuration, active balanced circuitry, power-routing features, and daisy-chain support suit structured audio installations requiring flexible signal and power distribution.

Ideal Use Cases

The DS-TPSL1A is designed for installations where a stereo audio source must be converted to mono and introduced into a Format-A twisted-pair system. It is particularly applicable when the source provides either a stereo mini-jack connection or separate left and right RCA outputs. A front-accessible source can be connected without an external stereo-to-mono combining device.

The selectable Format-A signal pair makes the sender useful in systems organized around pair A, B, or C. It can also be daisy-chained with single-pair or two-pair Format-A senders, supporting installations where multiple signals and modules share the twisted-pair cabling arrangement.

Why Choose This Model

This model combines input flexibility, active signal processing, and system power management in one module. The 10 kΩ unbalanced input accepts left and right audio through either connection format, while the output uses RDL TP Format-A over RJ45. A switch determines whether the mono signal is fed to pair A, B, or C.

Signal and power-pair pass-through is provided between the TP CABLE RJ45 jacks. The module can be powered remotely through the twisted-pair cable or locally from its detachable terminal-block connection. When local power is used, a fused feed supplies connected modules. A blue LED provides a clear indication that the module is powered.

Installation and Integration

Connect the stereo source using the mini-jack or dual RCA phono jacks, then select Format-A pair A, B, or C with the onboard switch. The module presents its Format-A input and output through RJ45 connections, allowing it to participate in the signal and power pass-through arrangement. Its output is specifically identified as RDL TP Format-A.

Power can enter through the detachable terminal block or RJ45 connection. The stated requirement is 24 Vdc at 25 mA plus the demand of connected loads. Recommended power supplies, which are not included, are the PS-24AS for the USA and PS-24AX for international use. The required minimum mounting-box depth is 2.4 inches, or 6.1 cm. The module measures 1.6 inches wide, 4.11 inches high, and 1.89 inches deep.

Performance Highlights

The DS-TPSL1A uses studio-quality precision active balanced circuitry. Its specified frequency response is 20 Hz to 20 kHz within ±0.25 dB. THD+N is less than 0.05% across the 20 Hz to 20 kHz range, specified noise is below -90 dB, and headroom is greater than 18 dB.

The input level is specified at 10 dBV. These published measurements define the module’s audio performance from full-range frequency response through distortion, noise, and available headroom. The supported ambient operating range is 0° C to 55° C.

What Makes It Different

The DS-TPSL1A does more than adapt connectors. It actively combines a two-channel stereo input into mono, converts the signal for RDL TP Format-A distribution, and lets the installer select the specific RJ45 signal pair being fed. This combination reduces the need for separate combining and twisted-pair transmission stages.

Its power architecture also distinguishes the module. Remote powering can arrive through the twisted-pair cable, while a local 24 Vdc input can supply the sender and feed connected modules through a fused connection. Signal and power-pair pass-through, together with compatibility for daisy-chaining with single-pair and two-pair Format-A senders, supports coordinated multi-module installations.

Final Assessment

The RDL DS-TPSL1A is a focused solution for combining stereo mini-jack or RCA audio into mono and sending it over a selected RDL Format-A pair. It pairs measurable full-bandwidth audio performance with RJ45 pass-through, remote or local power options, fused power distribution, and a powered-status indicator. For a system based on RDL TP Format-A that requires an active single-pair sender in stainless, its connections and operating specifications are clearly defined for installation planning.