THE SCT/SCR-8 BRINGS REMOTE CONTROL AND TELEMETRY TO HDTV VIDEO
CONTACT SUPERVISORY & CONTROL SYSTEM
Relay Control Over Audio System
The SCT/SCR-8 devices transmit relay contact control and alarm signals over any digital or analog audio link. The control signal is encoded in the audio channel prior to digitizing so it works with all digital compression systems. This system can be used with any existing audio programming to provide contact command and control information carried on the audio signal itself. Use this on your (STL) Studio To Transmitter Link or microwave system to send and receive contact information for remote control and telemetry from your transmitter site or any remote facility.
Contact closures at the SCT-8 transmitter input will be repeated as relay contact closures at the SCR-8 receiver output. The unit can be ordered with supervised resistance contact input/outputs.
The SCT-8 SUPERVISORY CONTROL TRANSMITTER and the SCR-8 SUPERVISORY CONTROL RECEIVER together make up an 8 channel alarm and control system. The transmitter unit uses a small portion of the 19KHz spectrum in the audio to insert coded contact information. At the other end of the audio link the receiver decodes the contact information and then removes the coded signal from the audio.
As many as 8 Transmitters and any number of receivers may be placed on one audio signal to give you up to 64 contact alarms. There is a separate system alarm contact on the receiver that will operate upon loss of power to the transmitter terminal or loss of transmission path audio link failure. This system can be used with existing audio in the 19KHz mode, or use it without audio in the 1.5KHz mode. These two modes of operation will give you maximum flexibility with your installation.
SCT-8 (Transmitter)
CONTACT INPUT SPECIFICATIONS
Channels 8 Channels (Current Loop 2mA)
Connectors 20 Pos. Screw Terminal
Alarm Sense Contact closure (Loop)
Maximum Loop Resistance 1K ohm (Supervised Optional)
Modulation Frequency 19KHz or 1.5KHz (Field Selectable)
AUDIO INPUT
Level 0 dBm
Maximum Level +18dBm
Impedance 20K Ohm (HI-Z Balanced)
Connector Screw Terminal
AUDIO OUTPUT
Level 0 dBm
Distortion > 0.01 THD.
Maximum Level +18dBm
Impedance 600 Ohms (LO-Z Balanced)
Connector Screw Terminal
SCR-8 (Receiver)
CONTACT OUTPUT SPECIFICATIONS
Channels 8 Channels (Relay Output)
System Alarm Output Normally Open Relay Contact
Connectors 20 Pos. Screw Terminal
Receiver Frequency 19KHz or 1.5KHz (Field Selectable)
AUDIO INPUT
Level 0 dBm
Maximum Level +18dBm
Impedance 20K Ohm (HI-Z Balanced)
Connector Screw Terminal
AUDIO OUTPUT
Level 0 dBm
Distortion > 0.01 THD.
Maximum Level +18dBm
Impedance 600 Ohms (LO-Z Balanced)
Connector Screw Terminal
MECHANICAL (each)
Size 9.00″L X 4.5″W X 3.0″D
Power 24 VAC 200 mA
For more information and pricing call: 800-235-6960 or CLICK HERE.
