12/21/2014 9:06 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684)
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Hello automation engineer; 5V is used to supply the logic circuits in the CPU and modules, while 24 V powers the modules themselves. This is described in many basic manuals of the S7-400, for example this one: S7-400 and M7-400 Programmable Controllers Hardware and Installation Electrical Supply The modules inserted in the rack are supplied with the required operating voltages (5 V for logic, 24 V for interfaces) via the backplane bus and base connector, by the power supply module fitted in the slot on the extreme left in the rack. Hope this helps, Daniel Chartier |
12/22/2014 7:24 AM | |
Posts: 21 Rating: (0) |
Thanks Sir, So nice of you.
Best regards, automationengineer |
4/1/2015 7:59 AM | |
Posts: 2 Rating: (0) |
Hi automation enginner 5 V DC also used for supply Buses on Main Rack Best Regards amkhedri |
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