RDL ST-ACR1 – Line-Level Audio-Controlled Relay, 0.5 to 5 s Delay
RDL ST-ACR1 – Line-Level Audio-Controlled Relay, 0.5 to 5 s Delay is backordered and will ship as soon as it is back in stock.
Shipping Availability*
Shipping Availability*
Free Ground Shipping on Most Orders Over $250.00
Looking for the best price or expert advice? Give us a call at 1-888-230-3661 or use the Live Chat below. Buying 1 or 100, you may qualify for greater savings beyond the advertised price.
RDL ST-ACR1 – Line-Level Audio-Controlled Relay, 0.5 to 5 s Delay
What is the RDL ST-ACR1?
The RDL ST-ACR1 is a STICK-ON audio controlled relay that switches equipment when line-level audio is present. It lets program audio trigger relay contacts, video switching or other control functions automatically.
How does it work?
A multi-turn SENS trimmer sets the trigger threshold from -30 dBu to 0 dBu, assisted by a threshold LED. A multi-turn DELAY trimmer sets how long the relay holds after audio drops below the threshold, adjustable from 0.5 to 5 s. The double-pole double-throw relay contacts switch up to 2 A, and an open-collector SLAVE output (25 mA) can drive indicators or slave relay modules, or a TX-MVX video switch. The balanced bridging input connects across balanced or unbalanced lines, and RDL recommends the PS-24AX power supply (international) or PS-24AS (USA).
What are the key features?
- Audio-triggered switching — The relay closes automatically when program audio exceeds the set threshold.
- Adjustable sensitivity — A multi-turn trimmer sets the threshold from -30 dBu to 0 dBu.
- Adjustable release delay — Hold time after silence is adjustable from 0.5 to 5 s.
- DPDT contacts — Double-pole double-throw contacts switch up to 2 A.
- Open-collector SLAVE output — A 25 mA output drives indicators or other RDL modules.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006
