Ignition Sense (Igns); Power Antenna Control (Antc); Figure 3. Connection - Radio Muting - Nokia NME-2A Series Installation Instructions Manual

NME–2A
Installation Instructions
When a relay is used, connect of series with the car radio main supply. A
200 mA fuse should be used to protect the XCRM output in event of a
short circuit. Some radios have separate supplies for amplifiers and
motors, and another for memory backup purposes. Very often these
radios also have a secret code system, which activates itself if a break in
the memory supply is detected. Be careful when installing the relay not to
break the memory supply (usually marked ACC or +MEM), but to install
the relay in the main supply feed.
GND
To XCRM line
(yellow wire)
Another possibility is to use a special muting unit (SR59), which mutes the
radio by connecting load resistors to the speaker lines of the car radio.
Four loudspeakers can be muted and the maximum permitted power is 20
watts per channel. The muting unit can also be used as a relay to cut the
main supply feed of the car radio.

Ignition Sense (IGNS)

The ignition sense feature prevents the transceiver from draining the car
battery by executing an auto power off 3 minutes after the ignition key has
been turned off (unless the Auto Power Off feature is activated).
The blue wire of the power cable is used for the ignition sense feature.
The use of IGNITION SENSE is recommended to prevent accidental
draining of the car's battery. The wire is connected via a 200 mA fuse to a
12/24 volts potential that is controlled by the ignition key. Do not connect it
directly to the high voltage sections of the ignition circuit. If the feature is
not used, just leave the wire unconnected, and protect the end of the
cable with insulating tape.

Power Antenna Control (ANTC)

The orange wire of the system cable (ANTC) may be used to control
different devices on and off. The voltage in this output is +12 V whenever
the phone is on. If the phone is turned off, the voltage disappears. The
maximum output current is 200 mA, therefore for example motorized
antenna must be controlled via a relay, see picture below.
Page 12
Bosch P/N 0–332–204–150
12 V, 30 A. SPDT
87A
CAR
RADIO
87
85
Figure 3. Connection – Radio Muting
Technical Documentation
12 V d.c.
30
Supply for
car radio
12 V d.c.
86
Fuse 200 mA
(not supplied)
Original 08/97
P.A.M.S.