FSR ML-400 - Manual (Page 3)

FSR
inc.
244 Bergen Boulevard, West Paterson, NJ 07424 Tel 973-785-4347 Fax 973-785-3318 E-Mail [email protected]
AUDIO PRODUCT GROUP
All microphone inputs as well as the music input are electronically balanced. All audio outputs are balanced,
600 ohm, transformer-coupled outputs insuring trouble-free installation.
There are two busses: Line A and Line B. Any wallplate that selects either of these busses will have its
associated audio summed with any other wallplate that selects the same line. Since this is a four-room
system (or less), only two busses are required to mix rooms in any conceivable fashion.
Whenever rooms are combined, those room’s music volume controls should be set at the same level. How-
ever, the microphone volume control should be set at minimum and only increased to proper level in the
room that has the microphone.
Note that the music audio can be summed with the microphone audio anytime the microphone switch and
the music switch are in the on position. This is not a usual condition and should be explained to the user.
The wallplates fully control the system; however, the wallplates receive no audio signals. This design
permits the main unit to be placed with the rest of the audio equipment, again simplifying installation and
servicing.
A “QUICK SETUP GUIDE” has been provided to simplify day-to-day operation. Please instruct the user on
the proper use of the ML-400 with the use of this guide.
ML-400 INSTALLATION DATA
The ML-400 Room Combining System is shipped with the following equipment:
• Audio Control Unit
• 4 wallplates with one packet of wallplate connectors (Crimp terminals)
• PM-2 Power Supply
Refer to the hookup diagram before installing.
The Audio Control Unit is to be located wherever the audio amplifiers are located. If the amplifiers are rack
mounted, then the ML-400 should be located near the top of the rack. The PM-2 power supply can be
located anywhere — the rear of the rack or on a nearby shelf.
The wallplates are mounted in standard 3-gang electrical boxes in the wall with the four 6/32 screws sup-
plied.
Prior to fastening the wallplate, connect the wallplate wires to the cable that homeruns to the main unit. The
packet of wallplate connectors permits direct connection to the cable with no wire stripping (see diagram).
If you use West Penn Wire #271 cable (8-conductor #22 AWG stranded, the yellow conductor is unused),
the colors from the wallplate will match the cable colors. The pinout for the pluggable screw connectors can
be found in the control hookup diagram.
NOTE: No audio lines are run to the wallplates.