3M C960, Service Information

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3
Speaker and Microphone Assemblies
Standard Systems
For standard systems, install the Deluxe 5–Inch Speaker and Microphone Assembly, Part Number 78–6911–
1545–1. Refer to the installation instructions packaged with the assembly.
Duplex Systems
For duplex systems, install the 3.5–Inch Duplex Microphone (with foam housing), Part Number 78–6911–4476–
6 and the 5–Inch Metal Speaker Assembly, Part Number 78–6911–4411–3. Refer to the installation instructions
packaged with the assemblies.
Face–to–Face Type Duplex Systems
The 3M Communications Bar, Part Number 78–6911–4451–9 contains the Duplex Speaker and Microphone
listed above. Refer to the installation instructions that are packaged with the assembly.
Base Station
1. For proper system operation, locate the base station module:
•
5 to 6 feet above the floor
•
at least 10 feet from the cashier/drive–thru window
•
At least 3 feet from large metal objects such as refrigerators, ranges, coolers, etc., and other metal or
electrical devices.
!
Important
Do not mount base station under steel countertops, within 3 feet of
coolers/refrigerators/ranges or in areas where it will be obscured by steel
doors, walls, etc. as this will cause operational problems.
2. Mount the base station using the included screws and anchors. (See Figure 3.)
Figure 3. Base Station Mounting Holes
3. Install conduit and cable clamps as necessary.
4. Feed the cables for speaker, microphone, vehicle detect and monitor speaker (if used) through the conduit
down to the interconnect module or base station. (See Figure 1.)
5. Feed the transformer cable from the outlet to the base station. (See Figure 1.)
Keep the transformer cable at least 6 inches from the left half of the base station. This half contains sensitive
radio components which will be affected if the cable is too close.