Rockwell Automation T8xxx Trusted Power Distribution Unit MCB 24Vdc - Manual (Page 8)

Trusted
TM
Power Distribution Unit MCB 24Vdc T8292
Issue 8 Nov 08 8
Figure 3 Single line power diagram
Power fed to the Trusted TM Power Distribution Unit MCB 24V is sub-distributed via the dual MCBs
either as an N+1 or 100% redundant configuration, via the fitting (for N+1) or removal of the board
mounted link, LK-N+1.
The standard factory-fitted configuration is N+1.
Each MCB is monitored for open circuit condition and provides a local on-board LED indication of
individual ‘trip’ status (red LED displayed for tripped).
A volt-free relay contact provides the common alarm output signal (contact open for tripped) for
connection to external alarm monitoring circuits.
For modules up to issue 5 the maximum difference between supply feeds must not exceed 1V.
2. Status Indicators
2-off green LEDs On to indicate that each power supply feeder is healthy.
10-off red LED On to indicate that the adjacent MCB has tripped.
24V-1 24V-2
TB1 TB2 TB3 TB4 TB5