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External input power supply sm321 input module

6/26/2009 6:40 PM	Rate (0)
Lucky123 Gold Member Joined: 12/20/2008 Last visit: 7/15/2025 Posts: 556 Rating: (237)	Does SM321, needs an external input power supply for the module? or module is powered from PLC\. I am asking for module not for I/O, terminal number 1, 10, 11, 20
	Last edited by: lalit at: 6/26/2009 6:43 PM
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6/26/2009 7:24 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 7/2/2025 Posts: 703 Rating: (98)	Hello, the module is powered through the lower bus connector and the external voltage for the inputs is to be connected on theaccessory connector according the description for each module, some summary is inthis FAQ: http://support.automation.siemens.com/WW/view/en/13033418 Regards Sydney
	Last edited by: Sydney at: 6/26/2009 7:26 PM
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This contribution was helpful to 1 thankful Users Lucky123

6/27/2009 2:02 PM	Rate (0)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 8/31/2025 Posts: 4522 Rating: (843)	Hello, I want to add another small info. If you are using more than one power supply in the project. You have to be sure that the supply of the digital input module is the same as the supply of the digital input sensors. Regards,
	Ayman Elotaify
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