@owend
HI OWEN I THINK I WILL JUST STICK TO THE SAME DIAGRAM PICTURE AND WIRING YOU SENT TO ME WITH THE SAME TYPE RELAY YOU SPECIFY AND THEN CONFIG THE CODE IN THE CONFIG.gfile AS YOU SHOW TO CONTROL FAN0 ON AND OFF .

I WILL POSSIBLY SEND BACK OTHER RELAYS OR MAY KEEP HOLD OF THEM.

REGARDING THE T H C I MAY USE A FLOATING HEAD TYPE SETUP OR A PROBE FINGERS CROSSED.

THAANKS FOR ALL YOUR HELP
HAVE A GOODAY OR EVINING ALL THE BEST MIKE SPK SOON

@owend
Hi Owen thanks for your help YOU ARE A TOP MAN
MAINS POWER IN = 240V TO PSU
V OUT OF PSU = 24V TO THE DUET BOARD
IT SAYS SOMWHERE IN THE DOCS THAT THE FAN OUTPUT WON'T TRIGGER A RELAY AS IT PUTS OUT 3.2V YOU CAN HOWEVER YOU CAN RUN A 12V FAN IF YOU REMOVE THE JUMPER AND USE A BUCK CONVERTER FROM PSU STEPPED DOWN TO 12V TO THE MIDDLE JUMPER PIN BELLOW THE FAN0 OUTPUT CONNECTOR.

SO I HAVE ORDERED SOME 5V RELAYS AND 3.2 V RELAYS WHICH ARRIVE TO DAY FROM AMAZON, IF THEY WON'T WORK, I CAN USE THE ONE YOU SURGGEST

SO I THOUGHT I WOULD USE THIS (optocoupler relay 8 Channel Relay Module 8 Channel Optocoupler 3.3V Relay Module Board High & Low Trigger 12V (24V) )

WINGONEER 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for arduino Relay.
IT WON'T SEEM TO LET ME ATTCHE PICS FROM AMAZON ?

HOPE THIS HELPS YOU TO HELP ME .

CHEERS MIKE

@owend Hi Owen getting a little lost how would you wire this up and config in the .g file.
if you could give me a diagram as well that would be excellent.
Where are you in the world , i am in the uk on the NW coast in a town called Southport about 20miles north of Liverpool.

Cheers Mike

@owend Hi there Owen thanks for your reply to the wiring for my plasma setup.

what i would like your help with is as follows:-

1. i am presuming that i take one wire from the left hand pin on the fan0 conection to the (S) pin on the relay.

(2) what would i type in the CONFIG .G FILE to enable the fan/relay to turn on and off.

Thanks for your help
Mike

@jumpedwithbothfeet
Hi thanks so much for the reply to my post i have a wiring diagram which is attached would it be possible to have a look at it and see if i am on the right track? the relay is for driving a cnc compatible plasma cutter just to turn on and off it has an imput avation type connector on the rear of the machine which has pins 1,2,3.and 4,
pins 1&2 are for firing the tourch i have tested this by touching the two wires from a 5v psu to pins 1&2 which fires the tourch and when removed tourch stops.
would be great if you could help.

Mikeduet wiring FOR PLASMA CUTTER.pdf

how do i control a relay with the duet 2 to switch a cnc compatible plasma cutter to turn on and off?
any help would great cheers mike