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Logo npn output

Created by: DmitryLakeev at: 3/12/2020 10:07 PM (6 Replies)

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3/12/2020 10:07 PM	Rate (0)
DmitryLakeev Regular Member Joined: 3/3/2020 Last visit: 12/9/2023 Posts: 44 Rating: (0)	Gentlemen, I have a new problem.... I am assembling the control panel for the filtration unit, it is already ready, but it turned out that the valves on the SMC pneumatic terminal are connected according to the npn scheme... can they be connected somehow, without intermediate relays? There is no more space in the Cabinet under the relay. I will slightly reinterpret the question, in the connection diagrams of the relay logo it is indicated that the positive wire is connected to the relay contacts and switched. Is it possible to connect part of the relay to the positive terminal and the negative part of it? Are these contacts connected within the logo?

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3/13/2020 3:31 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 4/29/2025 Posts: 35204 Rating: (4411)	The relay contacts of the LOGO! are potential-free contacts. This means that neither side of a relay contact is permanently connected to a potential. The contacts are also not firmly among themselves connected. With each relay contact you can choose which potential or which voltage level (up to 230 VAC) you want to Switch.

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3/13/2020 8:03 AM	Rate (0)
DmitryLakeev Regular Member Joined: 3/3/2020 Last visit: 12/9/2023 Posts: 44 Rating: (0)	Thank you, great. And then I started to panic)))) Do not tell me and the use of npn sensors, I believe it is impossible?
	Last edited by: DmitryLakeev at: 03/13/2020 08:03:38
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3/13/2020 8:06 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 4/29/2025 Posts: 35204 Rating: (4411)	Yes, it's possible. Attachment 24 VDC sensor with open collector NPN to LOGO! I5.pdf (311 Downloads)

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This contribution was helpful to 1 thankful Users DmitryLakeev

3/13/2020 8:56 AM	Rate (0)
DmitryLakeev Regular Member Joined: 3/3/2020 Last visit: 12/9/2023 Posts: 44 Rating: (0)	God grant you good health! I will put your photo on the nightstand next to the bed))))) Thank you!

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3/13/2020 4:04 PM	Rate (1)
Toeternietoe Platinum Member Joined: 12/27/2006 Last visit: 4/24/2025 Posts: 1199 Rating: (115)	Notice: If you use NPN inputs as shown on the example of ixo65 the input signal is inverted. If the output of the sensor is 1 (on), it wil see in the LOGO as a 0 (off)

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This contribution was helpful to 1 thankful Users DmitryLakeev

3/13/2020 6:09 PM	Rate (0)
DmitryLakeev Regular Member Joined: 3/3/2020 Last visit: 12/9/2023 Posts: 44 Rating: (0)	Toeternietoe Notice: If you use NPN inputs as shown on the example of ixo65 the input signal is inverted. If the output of the sensor is 1 (on), it wil see in the LOGO as a 0 (off) Ok! Thanks!

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