Maintenance Handbook

SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 6: Operation Overview
KH-1601-2 Issue 6
Page 36 of 80
6.2 Switching from Local to Remote Control
When Local control is no longer required, the
system MUST be switched to Remote.
The system can only be changed from Local to
Remote control using the switch on the Radar
Distribution Unit; it is not possible to remotely
change from Local to Remote.
The system can be set to Remote before the track extractor is on-line or ready (see below), this may
be desirable when handing the system back to the Remote operating station.
NOTICE
When set to Local, Remote operation and control is not possible.
Local
selected
With Local selected use the front panel or service
display to place the transceiver into RUN.
Ensure the system is transmitting and is configured
as required for operation.
Switch
to Remote
Switch from Local to Remote.
When the Track Extractor (or remote Service Display) is on line
the system continues to transmit and is ready to accept control
commands from the command & display system or track
extractor.
6.3 Safety & Security Switches
SAFETY SWITCHES
A normally closed safety current loop is provided for the serial connection of safety switch contacts
including an external Man Aloft switch.
ANTENNA ROTATION SWITCH
An Antenna Rotation safety keyswitch is provided on the RDU and is part of the
safety current loop noted above. This switch can be set to OFF, removed and
retained by the maintainer for safety.
MAN ALOFT SWITCH (MAS)
An externally mounted switch that is part of the safety current loop noted above
can be set to Free (antenna rotate) or OFF.
SWITCH ACTION
When either the Antenna Rotation keyswitch or Man Aloft switch are set to
OFF or if the safety current loop is broken/open, the single phase AC and antenna
motor supplies from the RDU to the transceiver/gearbox are isolated thereby
stopping Antenna Rotation and system transmission.
RDU Antenna
Rotation switch
External Man
Aloft Switch
SECURITY SWITCHES
There is also provision for an optional set of normally closed Antenna Platform and Hut Door switches
that can be used for monitoring purposes.
These switches do not isolate or control any part of the system. When fitted and enabled in the RDU
menus, the system reports the status of these switches to the RDU.
Remote Control
i.e. command &
display or track
extractor
Local Control
i.e. RDU front
Panel or optional
service
display control