TTL Relay Masso G3

[5-0coyote]

Good afternoon I am looking at some relays for torch trigger and maybe some stack lights. I am using a 24v power supplies one for Masso and one for THC. I originally thought I was going to be able to use simple ice cube relay but I guess not. I am a little confused and have searched the forms there seems to be a lot of confusion on the proper relays for the G3. I was looking at this one, but the question I have is do I need 5v unit or 24v because I have 24v supplies. Any special wiring of this to Masso? Any help would greatly appreciated



thank You

 

[model-and-toolmaking]

I use the 24v relays. The relay module will need power from the 24v power supply. Each relay can be triggered by running a wire to a Masso output.

 

[5-0coyote]

For some reason I was thinking 5v because of the output on the Masso being just under 5v. So in your opinion I need the 24v relays like the one in the pic. The seem simple the dc -/+ in plus trigger just trying to make sure I get the correct ones. Would be nice if they were din rail mounted.
Thanks for the help and be safe

 

[stevefrisby]

Its my understanding (And its quite confusing) is that the electronics before the relay on the relay board normally include circuitry that enables a 5v ttl output to drive the relay through an opto coupler (So the ttl output is protected from any high voltages and high currents on the relay side of circuit), the voltage rating that they sell the board as is the voltage required to drive the relay (Normally 5, 12, or 24v) so a 24v relay board will work with ttl drive on the input side but the relay on the other side of the opto coupler is driven by 24v supplied to the board. You can get a Din Rail plate that would allow you to mount the relays into a box or just on a board and fix it to the plate.

I have just looked up the specs on some that I have and they quote operating voltage (Volts to Drive the relay) which is what they are normally sold as, and the logic voltage as 5vdc (ttl voltage). They are also quoted as being optically isolated so the bard could have a melt down and your masso ttl should still be safe as there is no electrical connection between the ttl output and the relay (Just Light)

Cheers Steve

 

[breezy]

@5-0coyote

The important thing with that relay board, is that there is NO voltage on the trigger pins (those pins that connect to the MASSO) when the board is powered up.

Some boards have a pull up resistor on the TTL inputs which results in blowing up the MASSO TTL output circuits.

Search the forum for discussion on TTL compatible relays, here is one that I found in quick search.

https://www.masso.com.au/forums/topic/wiring-the-spindle-relay-to-masso-g3/?part=1

There have been several, one went quite deep into the internal circuitry of those style of boards. (Can't find it at the moment, it was in the last 4 months or so)

Regards,

Arie.

 

[segoman-designs]

Quote from SteveFrisby on April 4, 2020, 10:56 am

Its my understanding (And its quite confusing) is that the electronics before the relay on the relay board normally include circuitry that enables a 5v ttl output to drive the relay through an opto coupler (So the ttl output is protected from any high voltages and high currents on the relay side of circuit), the voltage rating that they sell the board as is the voltage required to drive the relay (Normally 5, 12, or 24v) so a 24v relay board will work with ttl drive on the input side but the relay on the other side of the opto coupler is driven by 24v supplied to the board. You can get a Din Rail plate that would allow you to mount the relays into a box or just on a board and fix it to the plate.

I have just looked up the specs on some that I have and they quote operating voltage (Volts to Drive the relay) which is what they are normally sold as, and the logic voltage as 5vdc (ttl voltage). They are also quoted as being optically isolated so the bard could have a melt down and your masso ttl should still be safe as there is no electrical connection between the ttl output and the relay (Just Light)

Cheers Steve

Correct you are and to that add it needs to be a hi/low type relay trigger set to hi. This is what I used:

https://www.amazon.com/HiLetgo-Channel-OPTO-Isolated-Trigger-Arduino/dp/B00LW2GA5Y/ref=cm_cr_arp_d_pl_foot_top?ie=UTF8

 

[5-0coyote]

Thanks for the help all.

SegoMan I m assuming you are using 12v power supply? How is you build coming along?

 

[segoman-designs]

Yes. I am 12 volt I went this route as all switches were 12v backlit and the pneumatic solenoids / 3 phase contactors are 12v as well. This is the power supply I used, it was recommended by many Ham users for reliability and low noise ( I Left it on the 13.8 default voltage):

15 Volt Variable Output Switching DC Power Supply 25 Amps

www.circuitspecialists.com

Do a search for "DIN rail mounting clips" if you want to keep your mounts all the same.

The build you ask?

I am waiting on the DingoDude to perfect THC then I can buy a 50 Duramax machine torch to work with the Hypertherm 65 that I can swap between both tables for now. Later on a Hyp 105 can be added as it still uses the same Duramax torch.

Did you see the vid of it? Those ClearPath SDSK's kick butt and are quiet, It running at 1100 IPM is quieter than the Torchmate at 100 IPM.