Controlling a Teco E510 Inverter via it's multifunctional input terminals with a Teensey 3.2

Is the current circuit design ok?


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jwa3003

Joined Oct 21, 2018
4
I am trying to control a Teco E510 Inverter via it's multifunctional input terminals with a Teensey 3.2

The Teco E510 has these multifunctional input terminals that can be used for a variety of different things. I would like to be able to control them with a Teensy 3.2.

The problem is that the Teco's multifunctional input terminals operate when 24V is applied to them. The Teensy 3.2 outputs 3.3V on it's digital pins.

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After mucking around I found that the following design achieved the desired results, however I don't feel like this is good way to do this as the 24V of the Teco is directly connected to the Teensy GND.

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What would be the correct way of doing this?
 

boydage

Joined Oct 7, 2016
92
I remember trying to control an inverter with Mach 3 software and there was a board I purchased somewhere that converted PWM to analog 0-10v. Although I dont know anything about the Teensy 3.2.

My Teco 510 is controlled in the machine I have by the 0-10V input. And external relays between the board and the 24vdc. Not sure if this helps you but it works well here.
 

RPLaJeunesse

Joined Jul 29, 2018
252
If I understand the Teco E510 manual page 3-47 correctly with JP1 set to NPN then the digital inputs require a switch to the "COM" pin to activate. I'd tie "COM" to the Teensy ground pin, and use BSS138 transistors as the needed 3.3 to 24V level shifters. (Source to COM/Teensy ground, gate to Teensy output, drain to the Teco. Add 33K from each gate to source so the BSS138s stay off while the Teensy is in reset.)
 
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