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APPENDIX 9 EMC INSTALLATION GUIDELINES
Appendix 9.6 Parts for EMC Countermeasures
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Appendix 9.6.4 Selection of stabilized power supply
Consider the following characteristics when selecting the stabilized power supply (prepared by user).
Use a power supply that complies with CE Marking or that follows the Safety Standards given below.
Stabilized power supply selection items
Item
Conditions
Voltage fluctuation
±5% ±5% or less of 24VDC output
Ripple noise Max. 120mV
±5% or less of 24VDC output
Output
Spike noise Max. 500mV
Output current –
Refer to the Connection Manual and
calculate.
Output holding time Min. 20ms Instantaneous OFF time
Standards
Safety Standards : UL1950, CSA C22.2 No. 234 approved, IEC950 compliant
Noise Terminal Voltage : FCC Class A, VCCI-1 Class
High Harmonics Current Restrictions : IEC1000-3-2