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Appendix 2 EMC Installation Guidelines
MITSUBISHI CNC
172
Appendix 2.6.4 Selection of Stabilized Power Supply
Consider the following characteristics when selecting the stabilized power supply (prepared by machine manufacturer).
Use a power supply that complies with CE Marking or that follows the safety standards given below.
Stabilized power supply selection items
Standards
Safety Standards: UL1950, CSA C22.2 No. 234 approved, IEC950 compliant
Noise Terminal Voltage: FCC Class A, VCCI-Class A
High Harmonics Current Restrictions: IEC61000-3-2
Item Standard setting Remarks
Output
Voltage fluctuation ±5% ±5% or less of 24VDC output
Ripple noise 120mV (max.)
Spike noise 500mV (max.)
Output current ――
Refer to the maximum current consumption of the unit in use
and calculate.
Output holding time 20ms (min) Instantaneous power failure time (AC side)