User Manual

121
MN024-08
condition
Aux input
alarm nr2
The device
connected to the
input alarm port 2
caused an alarm
condition
RED MINOR
Check the status of
the connected
device
-
Aux input
alarm nr3
The device
connected to the
input alarm port 3
caused an alarm
condition
RED WARNING
Check the status of
the connected
device
-
Warning (recommended for system designing and
installing)
Providing a correct heat dissipation
For a correct use of the TPRN sub-rack, it is important to verify that:
• the system is designed in order to put no more than 8 TFLN inside a
TPRN sub-rack. This guarantees a proper heating dissipation for the
system. In case you want to install more than 8 it is important to
provide the sub-rack with a proper ventilation system;
• active and passive modules should be alternated as much as possible
inside the TPRN sub-rack avoiding too many active cards being inserted
close together;
• in case the system consists of more than one TPRN sub-rack, a
minimum distance of 1 HE has to be kept between nearby TPRN sub-
racks to ensure proper heat dissipation. The rack containing the TPRN
sub-racks has to be large enough to guarantee this correct distance
between master units.
Minimizing equipment costs
In order to reduce the cost of Britecell Plus equipment, a multi-sub-rack
system should be designed according to the following guidelines:
• a passive sub-rack (TPRN04) may be used to house only passive
modules;
• an active sub-rack (TPRN14, TPRN24, TPRN34) may be used to sustain
all the active modules, and some of the passive ones (as stated above,
it is advisable to alternate active and passive cards into an active sub-
rack).
TPRN
Tab. 5.4: Description of the alarms of the TPRN subrack