# Electrical specs? **URL:** \ **Category:** FAQ / Support\ **Created:** [February 19, 2018, 7:33am UTC](https://forum.dadamachines.com/t/electrical-specs/51 "2018-02-19T07:33:02Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![murmichel](https://forum.dadamachines.com/user_avatar/forum.dadamachines.com/murmichel/32/6_2.png) [@murmichel](https://forum.dadamachines.com/u/murmichel)\ **Post date:** [February 19, 2018, 7:33am UTC](https://forum.dadamachines.com/t/electrical-specs/51/1 "2018-02-19T07:33:02Z")
I’m looking for a bit of documentation regarding the electrical specs. Automat: - What is the voltage used to drive the solenoids (or other actuators)? - What is the max current? - Is there some kind of protection against over current or short circuit? Solenoids: - Rated voltage? - Current consumption? ---
**Author:** ![johannes](https://forum.dadamachines.com/user_avatar/forum.dadamachines.com/johannes/32/11_2.png) [@johannes](https://forum.dadamachines.com/u/johannes)\ **Post date:** [February 19, 2018, 9:32am UTC](https://forum.dadamachines.com/t/electrical-specs/51/2 "2018-02-19T09:32:15Z")
@murmichel good that you are asking about this information. **dadamachines - automat specs:** **Input** - USB Powered - only for development / hacking without Actuators connected. - DC Powered - Power Supply 9V-24V - DC Barrel Plug 2.5 x 5.5mm Center Positive - 8A max current (protected by 5x20mm Cartridge Fuse (Feinsicherung) - The Power Supply coming with the automat toolkit has 24V - 160W - 6.6A **Output** - DC Outputs are always the same voltage you feed the automat - each Channel is limited to 1.4A current - The switching Transistor / MOSFETs for the Outputs are protected (Overload protection, Short circuit protection, Overvoltage protection, Current limitation and Thermal shutdown with auto restart) - Each Output has a Flyback Diode for protection against inductive loads FYI added this info to the dadamachines website as well: [https://dadamachines.com/getstarted/automat-specification/](https://dadamachines.com/getstarted/automat-specification/) **dadamachines - automat toolkit - solenoids** - 24V - 0.5A - 35% duty cycle ([http://www.thesolenoidcompany.com/glossary](http://www.thesolenoidcompany.com/glossary)) ---
**Author:** ![murmichel](https://forum.dadamachines.com/user_avatar/forum.dadamachines.com/murmichel/32/6_2.png) [@murmichel](https://forum.dadamachines.com/u/murmichel)\ **Post date:** [February 19, 2018, 10:25am UTC](https://forum.dadamachines.com/t/electrical-specs/51/3 "2018-02-19T10:25:39Z")
Thanks. To be clear, is the output voltage (roughly) the same as the input voltage? I.e., with a 24V power supply, do I get 24V at the outputs? ---
**Author:** ![johannes](https://forum.dadamachines.com/user_avatar/forum.dadamachines.com/johannes/32/11_2.png) [@johannes](https://forum.dadamachines.com/u/johannes)\ **Post date:** [February 19, 2018, 10:32am UTC](https://forum.dadamachines.com/t/electrical-specs/51/4 "2018-02-19T10:32:51Z")
@murmichel Yes. The Outputs are the same voltage you feed the automat. The automat is switching the Ground connection. Schematic layout of the Output Channel(s)… looks like this. ![59](https://forum.dadamachines.com/uploads/default/original/1X/36e8d8226e428fa8653d633f81545cbea76717da.png) ---
**Author:** ![murmichel](https://forum.dadamachines.com/user_avatar/forum.dadamachines.com/murmichel/32/6_2.png) [@murmichel](https://forum.dadamachines.com/u/murmichel)\ **Post date:** [February 23, 2018, 2:48pm UTC](https://forum.dadamachines.com/t/electrical-specs/51/5 "2018-02-23T14:48:02Z")
Can someone with a better understanding of EE than me explain whether/why it is a good idea to switch the ground connection? I would have expected that the supply voltage were switched. Considering that ground or something close to it is everywhere, there’s a failure case were the supply voltage is present at a solenoid and the other connector inadvertently touches ground.