P83676 A
Sheet 3 of 5
Figure 3: Control Unit Mounting
Figure 4: Horn Mounting
CAUTION:
Must be mounted as shown with keyhole tab at top.
CONNECTION DIRECTLY TO AN UNUSED CO PORT:
When connecting a TBH-104-LH directly to an unused CO port requiring talk battery to pass audio (most do), install with a
Wheelock RPS-2406 power supply as shown in Figure 4A.
Figure 4A: Unused Co Port Installation
WIRING INFORMATION:
The TBH-104-LH control unit is provided with 4 knockouts to accommodate 1/2 inch conduit for installation purposes. When
mounting the TBH-104-LH 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-LH:
- 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.
