M/A-Com M7100IP Series Installation Manual page 46

Please note: All extended option functions are only available at the
Main Control Unit.
7. A yellow ignition sense lead is provided on each control cable. If the
"Ignition Sense" feature is enabled on the Radio Unit, it is necessary to
connect only one of the yellow leads provided, whichever is convenient.
Tape back the unused yellow lead. See page 25 for details.
8. Install the speakers in convenient locations near each control unit.
Parallel Audio Installation Requirements
In special configurations that require both speakers to operate at the same
time (simultaneous audio), install the speakers for parallel audio operation.
Refer to Figure 28 for the Parallel Audio Setup Installation. Perform the
following steps to install parallel audio speakers:
A. Use the two 8Ω speakers, part number 19A149590P12, in place of the
two 4Ω speakers, part number 19A149590P11.
B. Hardwire each speaker directly (without relays) as shown in Figure 26.
It is very important to use the correct speakers for this application,
wiring 4Ω speakers in this configuration may cause damage to the
radio.
9. Install a relay (19A149299P1) from the kits supplied at a location near
the leads from each speaker. For mounting, use the #8 X 3/4" sheet metal
screw and nut plate supplied with each kit.
10. At a convenient point cut one of the wires in each of the 2-wire speaker
cables, spread the leads, and strip the ends. Crimp a 1/4" tab receptacle to
each end.
11. Main Control Unit Speaker: Connect the lead nearest the speaker to Pin
87 of the relay. Connect the lead nearest the connector to Pin 30 of the
relay. Connect connector to the accessory cable P2 (Refer to Figure 27).
12. Auxiliary Control Unit Speaker: Connect the lead nearest the speaker to
Pin 87A of the relay. Connect the lead nearest the connector to Pin 30 of
the relay. Connect the connector to accessory cable P2 (Refer to Figure
27).
13. For Each Relay: Connect a #18 AWG black wire between the relay, Pin
85 and accessory cable P3-1 (labeled "OUT2" on schematic diagrams in
the service manual). Use a 1/4" tab receptacle on the relay side and a
mating Molex connector and pins on the accessory cable side. Connect
the mating Molex connector to the accessory cable P3 when finished
(Refer to Figure 27).
46
NOTE