Figure 4A: Unused Co Port Installation
WIRING INFORMATION:
The TBH-104 control unit is provided with 4 knockouts to accommodate 1/2 inch conduit for installation purposes. When mounting the TBH-104
outdoors, a 1/2 inch conduit with rain tight fittings must be used to prevent damage to the unit due to water.
Follow the procedure below, and refer to Figure 5, when wiring to the TBH-104:
-
Make sure the 24VDC Power Supply is disconnected from 115VAC Power Source.
-
Remove cover of control unit by removing the 2 holddown screws; 4 more holddown screws are contained in a plastic bag within the enclosure.
-
Connect 24VDC power supply "+" and "-" to Control Unit "GND" and "-24" terminals, respectively.
-
Connect audio (Tip and Ring) from telephone system, or Wheelock Zone Control Modules to Control Units "TIP" and "RNG" terminals, respectively
-
For connection to an unused CO port requiring talk battery, install as shown in Figure 4A.
-
When used with Wheelock's Zone Control Modules:
(A) Connect the Control Units terminal labeled "INH" to the Zone Control Modules "INH" terminal.
(B) If Control Unit and Zone Control Module use separate power supplies, then also connect the adjacent
terminal labeled "GND" to the Zone Controls "GND" terminal.
-
When not used with Wheelock Zone Control, install jumper between adjacent terminals "INH" and "GND".
-
Connect the white wire from the horn to the terminal "H+".
-
Connect the white/red wire from the horn to the terminal "H-".
(For optional second horn, refer to Figure 2A for wiring connections to horns.)
-
Make sure wires do not rest against black heat sink on circuit board.
-
Recheck all wiring.
-
Connect the power supply to 115VAC power source.
OPERATING INSTRUCTIONS:
- Pick up telephone hand set and press the CO line button, or dial the number assigned to paging. When used with Wheelock Zone Control, next
touch/dial single digit number assigned to zone in which TBH-104 has been connected, and listen for page alert tone.
-
Paging and talkback is now possible. The calling party has control of the conversation (direction of speech).
-
Talkback is possible only while LED is illuminated and calling party is silent.
-
Talkback (respond hands free) at a voice level normally used (in that location) to respond to another person at the same distance.
-
Adjust the "HORN VOL" (PAGE) control and "MIC VOL" (TALKBACK) control located on the printed circuit board to desired levels See
Figure
5.
-
Replace cover on control unit and tighten sufficiently to ensure a watertight seal with the gasket.
P81752 G
Sheet 3 of 4
