Viking LDB-1 Loop Detector Board

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Loop Detector Board provides a loop activated contact closure when used in series with telecom devices on analog phone lines. Features: Phone line powered Excellent line balance Op tional power supply (Model #: PS-2) to provide switched DC power Initiates dry relay contact on any off-hook condition Mounting: (2) #4 screws (not included) or foam tape (included) Added Loop Resistance: 40 ohms Show more