S/5
TM
8-Module Frame, F-CU8 -12
7
Document no. M1125635-05
Power logic board
Figure 6 Power logic board block diagram (F-CU8, rev. 12)
Protections
These following protections generate automatic power off situations without any message in
advance.
1. High voltage protection (+32 V, +15 V, +5 V, +5 Vcpu). Requires manual start-up and
power cord must be disconnected for a while. Valid from revision 03.
2. Low voltage protection (+32 V). Automatic power off when U < +25 V. Automatic start-up
after voltage back to normal.
3. High current protection (all secondary outputs). Output restrained until cause is
eliminated.
4. High temperature protection. Automatic power off at +58 °C (approx.) and automatic
start-up at +54 °C (approx.). Possible caused by fan failure, fan filter is not clean or power
supply unit is overloaded. The measurement is located on the Power logic board.
Power ON/STBY control
Power ON/STBY control includes a logic with which power supply is switched on or off by
turning ON/STBY switch.
fcu8_power_log_brd_doag.vsd
To Next Page
Loading...
