1:2
Automatic mode without Priority: Auto led lit.
No Priority leds lit.
Operations in a 1:2 mode.
No manual switch commands will
be accepted by the controller while in automatic
mode.
Priority commands are
permitted.
IMPORTANT
A FLASHING Auto led signifies
that the controller cannot function in automatic.
This could be due to:
a) Switches not being connected, (more specifically,
not reporting a position.)
b) The highest level of priority has been met.
c) The standby amplifier has a fault condition.
Amplifier B is always
considered the backup amplifier.
No priority leds are lit when
in Automatic.
1:2 Operation without Priority:
To enter this mode, both
waveguide switches must be in position 1. That
means that both amplifier A and amplifier C are
online, with amplifier B working into a load.
In the event of a failure on
amplifier A, the controller will switch S1 and S2 to
position 2. This will place amplifier B online
and terminate amplifier A. At this point, the
automatic led will flash, indicating that no further
action with be taken in automatic mode.
In the event of a failure on
amplifier C, the controller will switch S3 and S4 to
position 2. This will place amplifier B online
and terminate amplifier C. At this point, the
automatic led will flash, indicating that no further
action with be taken in automatic mode.
In the event of a failure on
amplifier B (the back up amplifier), the controller
will do no switching. At this point, the
automatic led will flash, indicating that no further
action with be taken in automatic mode.
1:2 Automatic mode with
Priority: Auto led lit. Priority led
lit.
Operations in a 1:2 mode.
While in automatic, if an
amplifier has priority, the priority associated with
that amplifier will be lit. Note that the back
up amplifier cannot have priority.
While in automatic mode with
priority, everything from the previous section
applies to the operation of automatic mode.
Here’s the difference.
If a faulted amplifier is
backed up, and it is not the priority amplifier, the
controller continues to function in automatic.
Should the priority amplifier fail, amplifier B
changes the switches in order to backup the priority
amplifier. When the priority amplifier has
been placed online, then automatic has reached then
end of its cycle.
Example of automatic with
priority on C:
Amplifier C has priority.
All switches are in position 1.
No faults exist.
Amplifier A fails…..S1, and S2
go to position 2…..placing amplifier B online.
Should Amplifier C fail, Then
Amplifier C fails,,,,,,S1 and
S2 go to position 1, S3 and S4 go to position
2…..placing amplifier B online backing up amplifier
C.
Example of automatic with
priority on A:
Amplifier A has priority.
All switches are in position 1.
No faults exist.
Amplifier C fails…..S3, and S4
go to position 2…..placing amplifier B online.
Should Amplifier A fail, Then
Amplifier A fails,,,,,,S1 and
S2 go to position 2, S3 and S4 go to position
1…..placing amplifier B online backing up amplifier
A.
1:1 Automatic mode:
Auto led lit. Both priority leds lit.
For 1:1 mode operations.
No manual switch commands will
be accepted by the controller while in automatic
mode.
Priority commands are not
permitted.
IMPORTANT
A FLASHING Auto led signifies
that the controller cannot function in automatic.
This could be due to:
a)
Wave guide Switches not connected, (more
specifically, not reporting a position.)
b) The standby amplifier has a fault condition.
The DNL-5 controller can be
used as a 1:1 controller by setting dip switch S4-1
to the “ON” position. With this setting, only
the positions of S1 and S2, along with the fault
status of amplifier A and amplifier B are displayed
on the front panel. Also illuminated are BOTH
priority leds.
Both priority leds being lit
simply signifies that the controller is in a 1:1
mode. There is no “priority” in the 1:1 mode
per se.
The automatic operation of the
DNL-5 while in the 1:1 mode is as follows:
The online amplifier (amplifier
transmitting out) will be backed up by the amplifier
that is being terminated. The controller will
remain in automatic mode (no blinking automatic led)
as long as both amplifier are in a no fault
condition.
If a failed amplifier gets
backed up by the “other” amplifier, and then later
recovers, it then becomes the backup amplifier and
automatic resumes (automatically).
