Sepura SCG22 Series, Руководство по установке

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16
SCG22 Cabling and Connections
Note: Both the remote console and loudspeaker
extension cables are colour coded blue at the
SCG22 end to aid installation before the SCG22 is
installed.
Loudspeaker Connections
The following lead options provide connection to loudspeakers:
• SCG Loudspeaker / IO Lead
• SCG Loudspeaker / IO USB Host Lead
• SCG Expansion Board Loudspeaker / 8 GPIO Lead
CAUTION! The transceiver will be damaged if either
of the loudspeaker conductors (grey twin conductor
cable) is connected to ground. If the loudspeaker
output is to be connected to other audio systems, an
audio isolation transformer must be used.
CAUTION! Ensure that the cables are routed so that
they are kept clear of any existing vehicle system
cabling. Secure all cabling to eliminate the possibility
of damage by sharp edges or moving parts.
All cabling should be hidden and not left loose.
WARNING! 12V supply leads, antenna cables and
speaker wiring must be routed as far away as possible
from gas or fuel lines, and any in-vehicle electrical
wiring. This reduces the risk to safety in the event of
a leak.
DC Supply Connection
The following lead options provide connection to the DC supply:
• SCG Power / Ignition Lead
• SCG Power / Ign / IO Adapter Lead
CAUTION!
The transceiver is designed for nominal
12V negative earth systems. DO NOT use on other
supply systems because this will result in damage to
the product.
CAUTION! Ensure that the colour console cable and
any loudspeaker cables are routed so that they are
kept well clear of antenna cables and of any other
electronic devices such as electromagnetic systems
or AM/FM radios.
It is recommended that the power cable runs are kept as short as
possible. In a new installation where the SCG Power / Ignition Lead is
used:
1.
With the SCG22 end of the power connector resting in its intended
final position, route the wires to the vehicle battery, threading the
cable through the bulkheads if necessary (include the blue wire where
ignition switching is not required, see 3 below).
2. The positive power line must include a fuse as close as possible to the
power source. The negative power line must be connected close to
the battery-to-vehicle-body connection (not directly to the battery) and
must not include a fuse.
3. The blue wire provides an ignition sensing input. If ignition switching
is required, trim the wire to length so that it can be wired, via a
fuse, to the ignition switch, using the splicing connector provided.
Otherwise this wire must be connected, via a fuse, to the permanent
positive supply. A fuse must always be fitted close to where the wire is
connected.
4. Check the installation and fit the blade fuses. Fuse rating:
• Positive supply 10A, Ignition sense 1A (Automotive 19 mm
blade type - Littelfuse ATO®).