... through code switch.u automatically unlock when no power: when gates power on and work properly, if arm is ... to ensure no damage or incident; when gate power off, the arm will be automatically unlock for ... , when temperature is higher than 145 degrees, the power is automatically cut off, motor will not be burnt ... in the central 220V 3 × 1.5 mm2 single-phase power lines and 6 × 0.5mm2 shielding the line ...