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understand digital output module block diagram

Created by: Bofely at: 10/5/2012 8:13 AM (2 Replies)

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10/5/2012 8:13 AM	Rate (0)
Bofely Posts: 123 Rating: (5)	Hello, Anyone know what's inside the output driver block? The block after theoptocoupler. Can I see it as a bjt, a fet or something else? And what is the function of the zener diode in the block diagram? I include the block diagram as a attachment. Thanks, Attachment block diagram sm 322.pdf (107 Downloads)
Bofely Posts: 123 Rating: (5)
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10/5/2012 8:33 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 5/3/2024 Posts: 5697 Rating: (715)	Hello, I believe it's a transistor in the output circuit, but for sure nobody but Siemens knows, this kind of information is not on the street. The Diode is probably not a zener but a verry fast Diode to protect the output when relais is switched off (Counter-emf). Regards, Marcjan
	Last edited by: Marcjan at: 10/5/2012 8:35 AM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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10/5/2012 3:33 PM	Rate (0)
Bofely Posts: 123 Rating: (5)	thank you. I want to know this because of my problem in the other thread: output module manually drive to high
Bofely Posts: 123 Rating: (5)
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