Mitsubishi Q01CPU User Manual page 172

5
POWER SUPPLY MODULE
*3: Allowable momentary power failure time
*5: Inrush current
5
- 18 5.2 Specifications
5.2.1 Power supply module specifications
(a) For AC input power supply
• If the momentary power failure time is within 20ms, the system detects an AC
down and suspends the operation processing. However, the system continues
operations after the power comes back.
• If the momentary power failure time exceeds 20ms, the system either continues
or initially starts operations depending on the power supply load. In case that
the operation processing is continued, the system operates the same as when
the momentary power failure time is within 20ms.
Supplying the same amount of AC to both the power supply module and the
input module (such as QX10) can prevent the sensor connected to the input
module from being switched to the OFF status when the power supply turns
OFF.
Note, however, that if only the input module (such as QX10) is connected on
the AC line, which is connected to the power supply, an AC down detection in
the power supply module may be delayed due to the internal capacitor of the
input module. To avoid this, connect a load of approx. 30mA per input module
on the AC line.
In the system operating with two redundant power supply modules, the system
does not initially start operations when the momentary power failure exceeding
20ms occurs in only one of the input power supplies.
The system, however, may initially start operations when the momentary power
failure exceeding 20ms occurs simultaneously in both input power supplies.
(b) For DC input power supply
• If the momentary power failure time is within 10ms(*4), the system detects an
24VDC down and suspends the operation processing. However, the system
continues operations after the power comes back.
• If the momentary power failure time exceeds 10ms(*4), the system either
continues or initially starts operations depending on the power supply load. In
case that the operation processing is continued, the system operates the same
as when the momentary power failure time is within 10ms.
(*4: This is the time when 24VDC is input. If the input is less than 24VDC, the
time will be less than 10ms.)
When power is switched on again immediately (within 5 seconds) after power-off, an
inrush current of more than the specified value (2ms or less) may flow. Reapply power
5 or more seconds after power-off. When selecting a fuse and breaker in the external
circuit, take account of the blowout, detection characteristics and above matters.