duet2 ethernet expansion board heater 6

JV

Hello Guys i have a problem that i can't solve

I'm trying to drive a relay with an io pins.

In my expansion board i have the heater number 6 and i disable it with M307 H6 A-1 C-1 D-1 in config.g
But when i trying to used with M42 P6 S1, an error came out telling me

M42 P6 S1
Error: M42: Logical pin 6 is not available for writing

I try it to do this with the fan1 output and the solid state relay works when i have to put it on.
But when i put it off, the relay light turn off but the contact in the relay stay close, any body can tell me why this happens?

Thank you so much

CHANGE3D GmbH

Hi JV

Did you check if your disabled heater gets overwriten in the config-override.g file?

Best,
Markus

JV

@change3d-gmbh

Thanks for your reply, i found this in the config-override.g file

M307 H6 A340.0 C140.0 D5.5 S1.00 V0.0 B0

I cancel it from that file and now it work.

But i still having the same issue than the fan output, i mean the led in the FOTEK solid state relay that i connected to this output, is turning on and off with the M42 P6 S1 and M42 P6 S0 commands, but the contact stayed closed when i turn it off.

That's why i decide to use the heater 6 outputs thinking that the problems was the fan output

Thanks

CHANGE3D GmbH

Is it possible that the trigger current at heater pin 6 is too small?
http://www.fotek.com.hk/solid/SSR-1.htm

Could you try switching the relay on and off with the heatbed output just to test if the relay works?

dc42

@jv, what model of Fotek SSR is it?

JV

@dc42
Fotek SSR10DA-H

dc42

@jv said in duet2 ethernet expansion board heater 6:

@dc42
Fotek SSR10DA-H

Should be OK if you don't run too much current through it, that's the model I use to run my 240V 350W bed heater. However, many Fotek SSRs are fakes, typically using a lower rated triac than they should. When SSRs fail, they tend to go short-circuit. If the LED on the SSR is off, the triac should be off too.

JV

@dc42
Thanks guys for your help, i did change it with an Elco relay and it still not working...
There is any diference between fan1 output and heater 6 output for this application?
Thanks

JV

Hi Guys, i found the problem.

The Fotek SSR10DA-H relay works with a load in AC voltage and i was working with 24VDC voltage load and it doesn't has zero crossing.
I use the SSR88D-360 from ELCO company and it works very fine.
Completely solved.
Thank you so much