3: INSTALLATION AND W IRING3-18 FC5A MICROS MART USER’ S MANUAL FC9Y-B1268Power SupplyAll-in-One Type CPU Module (AC and DC Power)Caution Use a power supply of the rated value. Use of a wrong power supply may cause fire hazard. The allowable power voltage range is 85 to 264V AC for the AC power type CPU module, 20.4 to28.8V DC for the 24V DC power type CPU module, and 10.2 to 18.0V DC for the 12V DC power typeCPU module. Do not use the MicroSmart CPU module on any other voltage. On the AC power type CPU module, if the power voltage turns on or off very slowly between 15and 50V AC, the CPU module may run and stop repeatedly between these voltages. On the 12V DC power type CPU module, if the power voltage changes very slowly to turn on or off,the CPU module may run and stop repeatedly. When MicroSmart I/O signals are connected to a device which may cause a major accident in caseof an error, take a measure to secure safety, such as providing a voltage monitoring circuit outsidethe MicroSmart. Use an IEC 60127-approved fuse on the power line outside the MicroSmart. This is required whenequipment containing the MicroSmart is destined for Europe.Power Supply VoltageThe allowable power voltage range for the all-in-one type MicroSmart CPU module is 85 to 264V AC (AC power type),20.4 to 28.8V DC (24V DC power type), and 10.2 to 18.0V DC (12V DC power type). Do not use the MicroSmart CPU mod-ule on any other voltage.Power failure detection voltage depends on the quantity of used input and output points. Basically, power failure isdetected when the power voltage drops below 85V AC (AC power type), 20.4V DC (24V DC power type), and 10.2V DC(12V DC power type), stopping operation to prevent malfunction.On AC power type CPU modules, a momentary power interruption for 10 ms or less is not recognized as a power failureat the rated voltage of 100 to 240V AC.On DC power type CPU modules, a momentary power interruption for 10 ms or less is not recognized as a power failureat the rated voltage of 24 or 12V DC.Inrush Current at PowerupWhen the all-in-one AC or 24V DC power type CPU module is powered up, an inrush current of a maximum of 35A (10-and 16-I/O type CPU modules) or 40A (24-I/O type CPU module) flows.When the 12V DC power type CPU module is powered up, an inrush current of a maximum of 20A flows.100-240V ACL N24 or 12V DC+ –+–AC Power DC PowerPower Supply WiringUse a stranded wire of UL1015 AWG22 or UL1007 AWG18for power supply wiring. Make the power supply wiring asshort as possible.Run the power supply wiring as far away as possible frommotor lines.GroundingTo prevent electrical shocks, connect the or terminalto a proper ground using a wire of UL1007 AWG16. Thegrounding also prevents malfunctioning due to noise.Do not connect the grounding wire in common with thegrounding wire of motor equipment.Separate the grounding wires of the MicroSmart and external devices which can be a possible noise source.Use a thick wire for grounding the MicroSmart and make the grounding wire as short as possible to make sure that noisesfrom external devices can be conducted to the ground effectively.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
