Series 61 Modular Switch Range EAO Series 61 Modular Switch Range are high quality, modular switches that includes panel and flush mount IP65 sealed push-buttons, indicators, selector switches, key-locks, and internationally approved emergency stop switches. Illumination is provided by high-intensity LEDs and both self-cleaning snap-action and slow-make switch elements are available. Terminals come in Quick Connect/Solder or screw.