Wiring basics 7i97

rodw
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27 Mar 2022 21:10 - 27 Mar 2022 21:10 #238486 by rodw

Replied by rodw on topic Wiring basics 7i97

@Clive. yes.

Last edit: 27 Mar 2022 21:10 by rodw.

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PCW
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27 Mar 2022 21:58 #238490 by PCW

Replied by PCW on topic Wiring basics 7i97

The drawing has the relay polarized incorrectly

The coil pin that connects to OUT- is RELAY+
This coil pin should have the cathode (band) end of the flyback diode

I would verify that you have the flyback diode installed correctly
by using a current limited 24V supply, so you do not destroy the 7I97 output
if you have the diode installed backwards

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Kylizer
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27 Mar 2022 22:21 #238492 by Kylizer

Replied by Kylizer on topic Wiring basics 7i97

ok see the thing is that I am not necessarily trying to directly energize is. I still have the anilam servo board from the old setup and i am just trying to engage that relay because it will enable power to the amplifiers. I mean I hoped it would anyway.

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BigJohnT
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27 Mar 2022 22:58 - 27 Mar 2022 23:00 #238493 by BigJohnT

Replied by BigJohnT on topic Wiring basics 7i97

rodw wrote:
Looks right. Be sure to add a flyback diode across the relay contacts.

That drawing the relay is wired backwards, output - to relay +, relay - to 0vdc.

Looks like I need to add some basic wiring diagrams to my Mesa Configuration Tool... the one that configures a lot of cards... yet to be released... well it's out there.

JT

Last edit: 27 Mar 2022 23:00 by BigJohnT.

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Kylizer
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27 Mar 2022 23:00 #238494 by Kylizer

Replied by Kylizer on topic Wiring basics 7i97

ok and this is to a solid state relay btw

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BigJohnT
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27 Mar 2022 23:06 #238495 by BigJohnT

Replied by BigJohnT on topic Wiring basics 7i97

PCW wrote:
The drawing has the relay polarized incorrectly

The coil pin that connects to OUT- is RELAY+
This coil pin should have the cathode (band) end of the flyback diode

I would verify that you have the flyback diode installed correctly
by using a current limited 24V supply, so you do not destroy the 7I97 output
if you have the diode installed backwards

Peter is a 1N4007 a good choice for a flyback diode?

JT

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PCW
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27 Mar 2022 23:13 #238496 by PCW

Replied by PCW on topic Wiring basics 7i97

Yes IN4001 --> IN4007 are fine for 24V relays

(The OP just stated that the relay is a SSR so it needs no flyback diode)

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BigJohnT
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28 Mar 2022 12:51 #238520 by BigJohnT

Replied by BigJohnT on topic Wiring basics 7i97

I started creating wiring example schematics...

The following user(s) said Thank You: tommylight, Masiwood123

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Kylizer
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28 Mar 2022 21:07 #238552 by Kylizer

Replied by Kylizer on topic Wiring basics 7i97

Man thats so awesome. Things like that help me so much.

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BigJohnT
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28 Mar 2022 22:44 #238560 by BigJohnT

Replied by BigJohnT on topic Wiring basics 7i97

The Mesa Configuration Tool is here if you want take a preview as it is a fresh work in progress.

JT

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Wiring basics 7i97

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