描述
PLC一般使用220V交流电源或24V直流电源。内部的开关电源为各模块提供DC5V，±12V，24V等直流电源。小型PLC一般都可以为输入电路和外部的电子传感器(如接近开关)提供24V直流电源，驱动PLC负载的直流电源一般由用户提供。
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3COM 3CRVH700996D VCX Connect 200 Diskless Server Spare
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3COM 3C0VH722096A 3com V7205 Series 73 Gig Raid Disk
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3COM 3C0VO71113-05-US FXO Media Gateway
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3COM 3C0VH722296A VCX 146 Gig RAID Disk HARD DRIVE SALE
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3COM 3CRVH701296A VCX V7205 IP Communication Server HDD
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3Com Switch 8814 Starter Kit – switch 3C17500
3Com NBX V3000 IP Telephony VOIP SIP MODE 3C10600A 6.0
3COM 3C10240 MEMORY UPGRADE INCLUDED !!!!
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3COM 3C10201 SuperStack 3 NBX V5000 Call Processor 250
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3COM 3C0VH701996C V7005 Series/VCX Connect 200 Internal
