KEPCO RCW 350W Series - Manual (Page 17)

RCW350W 120607
15
FIGURE 11 TIMING DIAGRAMS FOR THE RCW 350W POWER SUPPLY
4.2 UNDERVOLTAGE PROTECTION
When the output voltage falls to less then 60% of the rated output voltage (for more then 20 seconds)
the output is cut OFF and the fan stops automatically. To restart (reset) the unit it is necessary to
remove the AC input power, wait 40 seconds and then to reconnect the AC input power.
Another way to reset the power supply is to short circuit the (±) RC terminals and then open the ter-
minals). An indication of undervoltage is provided by a red LED and a logic alarm output (at the (±)
AL terminals) .
4.3 PF INPUT POWER FAILURE
When the input voltage to the Power Supply falls down, the power failure circuit alarm will be gen-
erated for 2ms before the output of the Power Supply is cut off. The input voltage power failure is
indicated by a logic alarm output (at the (±) PF terminals).