GAI-Tronics 7085-005-UL, 7085-005-EX SmartSeries Multi-Party Hazardous Area Handset/Speaker Amplifier Enclosure w/ RTU Control User Manual
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Pub. 42004-697L2B
Model 7085-005-UL/EX SmartSeries Multi-Party Haz. Area Amp. Enclosure with RTU
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Internal
The multi-party enclosures contain three terminal blocks, an interior mounting plate, an amplifier bridging
plate, and a connector for the mating Model 709-901 Amplifier. The amplifier bridging plate is hinged on
one side and attached on the opposite side with two #10-32 screws. For system cable installation, the
screws to this plate must be removed and the bridging plate swung open 90º. Upon installation of the
wiring cable, the amplifier bridging plate can be rotated closed and reattached with the two #10-32 screws.
This plate will then serve as a protection for the amplifier and the switches from the system cable when the
unit is completely closed. Refer to Figure 3.
The RTU control adds an additional 8-point terminal block, fuse holder with installed fuse, and RTU
control PCBA. These items are mounted to the interior mounting plate and backside of the amplifier
bridging plate. Care should be taken to keep wires out from behind the RTU PCBA so as not to damage
the components when the bridging plate is swung closed. The RTU PCBA is connected to the amplifier
with a 10-point ribbon cable. Refer to Figure 3.
The party line selector switch can be disconnected from the amplifier bridging plate by means of the 12-pin
connector. Upon installation of system cable, after the amplifier bridging plate has been reattached, plug
the 12-pin connector back into its receptacle.
N
OTE
: The front door can be swung approximately 120º before the plug must be disconnected.
Figure 3. Model 7085-005-UL/EX Amplifier Enclosures interior view