Viking LDB-1 Instructions d'utilisation

The LDB-1 provides a loop activated contact closure

when used in series with telecom devices on analog

phone lines. The LDB-1 will initiate a dry relay contact

on any off-hook condition. Alternatively, add the optional

PS-2 power supply to provide switched DC power.

Loop Detector Board with on board

12 Volt Regulator

VIKING©

Technical Practice

Telecom Solutions for the 21st Century LDB-1

Loop Detect Board

November 24, 1999

Dimensions: 47.6mm x 30.5mm (1.875” x 1.2”)

Mounting: (2) #4 screws (not included) or foam tape (included)

Shipping Weight: .45 kg (1 lb)

Added Loop Resistance: 40 ohms

Maximum Loop Current: 125 mA

Minimum Loop Current: 18 mA

Operating Temperature: -26°to 54°C (-15°to 130°F)

Installation

Installation Diagram

Printed in the U.S.A. ZF301230 Rev AFax Back Doc # 406

Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking

Electronics, its affiliates and/or subsidiaries assume no responsibility for errors and/or omissions contained in this information. Revisions of this

document or new editions of it may be issued to incorporate such changes.

Product Support Line...(715) 386-8666 Fax Back Line...(715) 386-4345

Incoming

Phone line

Telecom

Device

N.O. dry contacts

Note: If dry contacts

are required, do not

use PS-2.

The relay itself is phone line powered and does not need an

external power supply. Because both TIP and RING currents flow

through the relay, excellent line balance is maintained.

Specifications

Maximum Supply Voltage Input: 35 VDC

Maximum 12V Supply Current: 500 mA with PS-2

Longitudinal Balance: 63 dB minimum

Maximum Contact Voltage: 200 VDC

Maximum Contact Current: 500 mA

Maximum Contact Power: 10 W

Connections: 7 pin screw terminal block

12V DC Output

- or -

Optional PS-2 Power Supply

(not included)

http://www.VikingElectronics.com

Sales...(715) 386-8861

Schematic Diagram

+12V DC

COM

1 2 3 4 5 6 7

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