Siemens SIMATIC Rack PC 840 - DC Power Supply

Hardware Information
7-35
SIMATIC Rack PC 840 Manual
A5E00104826-03
7.9 DC Power Supply
Output Voltages
Voltage Max. Current Voltage Stability
+ 12 V 8 A " 4 %
– 12 V 0.5 A " 6 %
+ 5 V 30 A " 3 %
– 5 V 0.5 A " 5 %
+ 3.3 V 20 A " 5 %
+ 18 V aux 0.08 A " 5 %
* The total power comsumption of the +5V and +3.3V voltages may not exceed 160 W.
Power-Good-Signal
T1 T2 T3
Power–Good Signal:
Input voltage
+5 V secondary
POWER GOOD
T1: preset time 100 ... 500 ms
T2: hold-up time Not specified
T3: save time 1 ms mimimum
voltage
Figure 7-13 Time Characteristics of the Power Good Signal