KEPCO RCW 350W Series - Manual (Page 16)

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RCW350W 120607
4.0 ALARM FUNCTIONS
4.1 OVERVOLTAGE AND OVERTEMPERATURE PROTECTION
When the output voltage or the internal temperature of the RCW 350W Power Supply increases
beyond the specified values (see Table 1), the output is cut OFF and the fan turns OFF. To restart
(reset) the unit it is necessary to remove the AC input power, wait 40 seconds and then to recon-
nect the AC input power.
Another way to reset the power supply is to short circuit the (±) RC terminals and then open the ter-
minals. However, when the Power Supply shuts down due to an increase in internal temperature,
the restart cycle (Power ON) should not begin until the temperature returns to within specifications.
Indication of an overvoltage or overtemperature condition is provided by a red LED and a logic
alarm output (at the (±) AL terminals) The alarm circuit is a diode transistor optical coupler. The
alarm is activated when the collector emitter circuit is open (see Figures 10 and 11).
FIGURE 10 LOGIC ALARM OPTICAL COUPLER OUTPUT FOR THE RCW 350W POWER SUPPLY