This versatile relay works with home automation controllers with a digital input, like the Stargate (#1240), TimeCommander Plus (#1200) or HomeVision (#1350). It detects NTSC and PAL video signals as weak as ?-volt and then closes relay contacts. Both normally-open and normally-closed contacts are provided, enabling it to respond to the presence or loss of video. A front-panel LED lights up when a signal is detected, providing additional visual confirmation.
The relay has a loop-through video output, so you don't have to worry about signal loss or attenuation. Gold-plated, high-quality BNC connectors also ensure maximum signal transfer and solid connections. The relay may be inserted in video lines with the loop-through video output feeding a terminated load. Can also be installed at the end of a video line by installing a 75-ohm terminator to the loop-through video output jack (terminator included). This ultra-compact unit can be mounted in tight spaces by mounting directly to a backboard or with an included double-sided adhesive pad.
Don't Forget the Power Supply!
Because this relay uses an uncommon power supply that may be difficult to find at stores, we recommend using the 24VDC power supplies listed below (each sold separately). Made by the same manufacturer as the relay itself, these power supplies are fully UL-approved. If you plan on only using one relay, use the 400mA version (#7796PS4). If you plan on powering one or more relays, use the 1000mA version (#7796PS1).
For security camera installations, the camera and relay may be powered by a common low-voltage AC supply, provided the camera is internally ground-referenced (the relay is a negative ground-referenced product). In the unlikely event it's connected on a common AC supply with a positive ground-referenced camera that's not transformer isolated, a "ground fault" may occur. The relay automatically detects such a fault, disconnects itself from the power input, and illuminates the FAULT LED, alerting you to transformer-isolate the relay's power source from the camera power source, protecting both the camera and the relay from damage.
0.5 V p-p video to 1 V p-p video
Loop-through, BNC, Ground- referenced
(Output must be terminated with connected
load or with 75 ohm terminator supplied)
N/O or N/C relay contacts
12 to 33 Vdc Ground referenced,
OR 12 to 24 Vac, @ 75 mA
Max. Switching Power
60 W, 125 VA
Max. Switching voltage
220 Vac, 250 Vdc
Max. Switching Current
Max. Carrying Current