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BRITECELL System Manual MN010-04 June 2003 Page 37 of 78
The company has a policy of continuous product development and improvement and we therefore
reserve the right to vary any information quoted without prior notice.
25. Functional description
The TPR subrack provides:
• power supply to the active plug-in cards (12VDC);
• alarm logic and relays;
• mechanical housing and positioning.
25.1. Block diagram
Fig. 24 – TPR block diagram
26. Alarms
The TPR sub-rack has a built-in alarm circuit: any fault in TFL or TFA causes a
contact relay close or open.
A sub-D 9 pins male connector at the back of the sub-rack gathers summary and
A sub-D 9 pins male connector at the back of the sub-rack gathers summary and
specific alarms of master/local subrack (see Tab. 6)
Fig. 25 alarm relay connector
AC/DC
or
DC/DC
DC/DC
converter
backplane, logic & relays
DL
DL
UL
MAINS
Sub-D Male
Master sub-rack alarms
Sub-D Female
Slave sub-rack alarms