User Guide

PAMS
Technical Documentation
NME–3
Installation Instructions
Page 10 Amendment 11 / 99
When a relay is used, connect of series with the car radio main supply. A
100 mA fuse should be used to protect the XCRM output in event of a
short circuit. Some radios have separate supplies for amplifiers and mo-
tors, 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.
CAR
RADIO
12 V d.c.
12 V d.c.
Supply for
car radio
Fuse 100 mA
not supplied)
To XCRM line
(yellow wire)
85
87
87A
30
86
Figure 3. Connection – Radio Muting
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 45 sec.– 24 houres after the igni-
tion key has been turned off (unless the Auto Power Off feature is deacti-
vated).
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 1 A fuse to a 12
volt 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.