Telephone Ring/Loop Detector

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

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

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
Made in the USA
1 Year Factory Warranty

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: -26deg C to 54deg C (-15deg F to 130deg 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