PKU 15-21 pushbutton control stations are designed for switching AC control circuits with voltage up to 660 V at 50/60 Hz and DC up to 440 V. Wall-mounted stations are used for control and indication in electrical systems; emergency stop stations are used to prevent or reduce the danger of injury to personnel and equipment damage. * Impact-resistant housing; * High reliability; * Easy device installation; * Ability to select any button configuration, which optimizes the control process.