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A. Mounting
The LDB-2 is designed to be wall mounted using the included foam tape or with screws as follows:
Step 1.
Unsnap the plastic cover (see Diagram A) and remove the top screw holding the circuit board.
Loosen the bottom screw and rotate the circuit board to the left, exposing the two mounting holes
Step 2.
in the base (see Diagram B).
Step 3.
EScrew the base to the wall, etc. using (2) #6 flathead or sheetrock screws.
Note: Make sure the screw heads are fully driven into the base to avoid shorting the circuit board leads.
B. Wiring
IMPORTANT: Electronic devices are susceptible to lightning and power station electrical surges from both the
AC outlet and the telephone line. It is recommended that a surge protector be installed to protect against such
surges.
12V DC
Adapter
Included
To C.O. Line or Analog
PABX/KSU Extension
Relay Contact (pins 5 & 6)
C. Ring Detection Only
Connect the incoming line to terminal block positions 3 and 4. No connection to terminal block positions 1
and 2 is required. In this manner, the LDB-2 can monitor for ringing any place along the ringing line.
D. Ring and Loop Detection
If the application requires loop as well as ring detection, the LDB-2 must be placed between the phone
line and the terminal device to be monitored. Connect the incoming line to terminal block positions 1 and
2 and connect the terminal device to positions 3 and 4, as shown in the diagram above.
E. Relay Contacts
Relay contacts are available at terminal block positions 5,6 and 7,8. If the contacts are driving an inductive
load, be sure to place a suppression device at the load to snub any high voltage spikes.
VIKING
©
MODEL: LDB-2
Ring/Loop Detector
+ 12V DC .3A MAX
DC COMMON
JP2
JP1
TERMINAL DEVICE
INCOMING LINE
Viking Electronics
Hudson, WI 54016
Diagram A
120V AC
To Phone
Installation
(2) #6 Flathead
Screws or Sheetrock
Screws (not included)
1
2
3
4
5
6
7
8
9 10
2
Internal View
of the LDB-2
Mounting
Holes
Diagram B
Internal View
of the LDB-2
Auxiliary 12V DC Output
Relay Contact (pins 7 & 8)
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