Product Description:

The Viking LDB-2 Ring/Loop Detector monitors an analog phone line for ringing or an in-use condition. A built-in relay can be activated when either of these conditions are detected. This is ideal for monitoring line status or for providing a visual indication of such.

When monitoring for ring, an internal pot can be adjusted to allow the relay closure to stay on steady, or follow standard ring cadence.

The Viking LDB-2 comes complete with a 12 VDC power adapter, and can also provide 12V DC power through its auxiliary 12V DC output terminals.

Viking LDB-2 Applications


Control a strobe light for ring indication
Provide relay closures on ring and off-hook
Trigger a security camera
Trigger a tape recorder
Phone “In Use” indicator

Viking LDB-2 Features


Detects ring voltage and loop connect
Screw terminal connections
Wall mountable with foam tape (included) or screws (not included)
Auxiliary 12V DC output
Adjustable time-out for relay closure
Two sets of relay contacts provided
Selectable NO (normally open) or NC (normally closed) relay contacts



Viking LDB-2 Specifications


Power: 120V AC to 12V DC adapter provided
Dimensions: 74mm x 53mm x 25mm (2.9” x 2.1” x 1.0”)
Shipping Weight: 0.4 kg (0.86 lbs)
Environmental: -26° C to 54° C (-15° F to 130° F) with 5% to 95% non-condensing humidity
Contact Rating: .5A @ 125V AC/1A @ 30V DC
Maximum Current Draw Auxiliary 12V DC Output: 350mA
Minimum Loop Current: 15 mA
Minimum Ring Voltage: 40Vrms
Ringer Equivalence: 0.5 A REN
Connections: 10 pin screw terminal block

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