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The RDL ST-VOX1 is a compact voice-activated audio controlled relay in the "Stick-On" line of products. The ST-VOX1 can be triggered directly from an unbalanced microphone when used in intercom or talkback applications. In many of those applications, the microphone signal must be preamplified, making the ST-VOX1 an great partner to the STM-1 preamp. The ST-VOX1 can also accept line-level signals and a slave terminal allows additional relays to be added.
Compact housing for versatile installation
Control switching from voice signal
Accepts mic or line-level signals
Precise threshold adjustments
DPDT switching contacts
Open-collector slave output
In the Box
RDL ST-VOX1 - Voice-Activated Relay
3 Year Limited Warranty
Table of Contents
Mic: 5 k ohms Unbalanced
Line: 200 k ohms Unbalanced
Mic: -75 to -25 dBu (Adjustable)
Line: -45 to -15 dBu (Adjustable)
Open-Collector @ 50mA, Suitable to Drive Indicators or Slave LCR
60 W, 125 VA (Max)
220 VDC, 250 VAC (Max)
2 A (Max)
3 A (Max)
Audio Threshold LED
Release Delay Time Adjust Range
Relay Contacts: 70 to 260 ms
Slave: 15 to 60 ms
24 to 33 VDC @ 50mA (Assumes 20mA Max. Load at Slave Output) (Ground-Referenced)