it was a bit scary at first so I stood quite a bit away.
it is not M18 claymore mine, don't need to stand far away when power it up, lol.
I heard the click, didn't make any hum or anything
it doesn't hum, it is DC power input, not like the AC power input solenoid that "hum" when the coil is loose.
The hum is also call "AC hum", it is the sound from vibration of coil, and the vibration is because of the alternate current.
24VDC 200mA adapter.
Bettatail says it uses 125mA,
this solenoid is 3 watts, lower than the Burkert 6011 which is 4 watts, and it is full metal body, heat dispatching should be better.
Power(watts) = Current(amperes) ◊ Voltage(volts)
3 watts and 24V DC input, the current passing through the coil is 125mA
The class 2 transformer is 200mA max current output, the actual current passing the solenoid depends on the solenoid itself(coil resistance), so it is 125mA.
Voltage(volts) = Current(amperes) X Resistance(ohms)
the resistance is 192 ohms.