Talkaphone IW-HFM-4 Interview Window 4-Button Master - Manual (Page 6)

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Talk-A-Phone
Co. • 7530 North Natchez Avenue • Niles, Illinois 60714-3804 Page 6 of 13
Phone 773.539.1100 • Fax 773.539.1241 • [email protected] • www.talkaphone.com
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Figure 3. First Master Junction Box Paging Connections
6. Connecting the Paging Cables of Intermediate IW-HF-4 Masters
In the Junction Box of intermediate Masters, connect wires from the previous Junction
Box and the next Junction Box to the same terminals as shown in Figure 4 below.
Note: Connect both shields to the terminal marked “SHLD”.
Figure 4. Intermediate Master Junction Box Paging Connections
7. Connecting Paging Cable from Last Master to First Interface Box
On the white “euro” type terminal block included with the Interface Box, connect all
wires from the paging bus cable from the last Master Junction Box to similar wires from
the Interface Box as shown in Figure 5 below. Then connect an identical set of
paging/control wires to the same terminals as the first set and continue this cable to the
terminal block of the next Interface Box. Note that the shields coming from the Interface
Box should not be connected and should be taped off to prevent shorting.
NOTE: As shipped, there are 620 Ohm, 1/2 watt resistors connected on each of the
pairs coming from the Interface Box. Be sure to remove these on all but the last
Interface Box.
If a music/program source is being used, connect another shielded pair from the music
terminals on the Interface Box to the last three terminals on the terminal block. Then
run this cable to the next Interface Box terminal strip or, if the paging zone is to receive
its own music program, connect directly to the source. If this is the last (or only)
Interface Box to which the music source is being connected, connect a 620 Ohm, 1/2
Watt terminating resistor (included) between the black & yellow terminals on the
Interface Box side of the terminal block as shown below.