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David

David

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Came with my CNC kit.
IMG_1770.jpeg
 
Doggggboy said:
inkbird.com

INKBIRD SSR for PID Temperature Thermostat Controllers

25A DA SSR SOLID STATE RELAY for temperature controller Specifications: Load Voltage: 24-380VAC Load Current: 40A Input Voltage: DC 3-32V Pacakge: 1x 25A DA SSR 40A SSR SOLID STATE RELAY for temperature controller Specifications: Load Voltage: 24-380VAC Load Current: 40A Input Voltage: DC 3-32V...
inkbird.com inkbird.com
Click to expand...
yep, just what I use mine for in conjunction with the PID controller. It turns on low voltage when temperature falls too low, and the SSR turns on 120v fan to send more oxygen to my coals.
 
Super, thanks gents.
I plan to use contactors to turn on the 110V and 220V AC power to the two power supplies.
I'm struggling to see a need for this in my CNC enclosure.
 
The problem with relays is that the contacts arc because they switch on power when the voltage may be at a peak. The SSRs only switch at the zero crossing so they are easier on the equipment. You can generally run them with a lower voltage output. For example a 12V relay needs a diode across the windings and needs to have 12V to switch on. The SSRs don't need that and can often be switched on with just 5V so a perfect companion for your interface board.
 
The relay outputs on most VFD's are limited to a very low current. I used the relay outputs to control similar SS relays to send current to my electric brakes on my lathes.
 
jcdammeyer said:
The problem with relays is that the contacts arc because they switch on power when the voltage may be at a peak. The SSRs only switch at the zero crossing so they are easier on the equipment. You can generally run them with a lower voltage output. For example a 12V relay needs a diode across the windings and needs to have 12V to switch on. The SSRs don't need that and can often be switched on with just 5V so a perfect companion for your interface board.
Click to expand...

Good points. Use a contactor to switch the main power on. The E-stop will be wired in series with the solenoid of the contactor. After the contactor use the SSR on one side of the circuit to control the device you are applying the power to.
 
For example the inexpensive Break Out Board from China has standard logic outputs for the Step/Dir pins but does have a relay that can control something larger like a contactor or solenoid.
ChineseBoB.jpg
 

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jcdammeyer said:
It's the control of the solenoid that is the issue. If it's a 12V solenoid and your Masso controller has 5V output it won't run. So first question to answer is what are the specifications of the outputs on the controller?
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It is 5V so I'll need something to trigger the solenoid.
 
I’m using an ssr on my electric kiln and on my hot tub controller boards. Nice way to energize large loads
 
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