Series 70: Machinery and Automation, Medicinal technology, Laboratory and measuring equipment
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Market segments The Series 70 consists of special short stroke pushbuttons for use with membrane keyboards. It is particularly suited for: The Series 70 incorporates the following functions: The EAO Series 70 is especially suited for applications in the segments: Indicator Pushbutton Illuminated pushbutton Machinery and Automation Medicinal technology Laboratory and measuring equipment The use of single LEDs ensures that the entire control panel is very well illuminated. The module is offered in six colours and in a round or square design. Please refer to the EAO website to obtain detailed information regarding this series www.products.eao.com Configure a product to your exact needs and request a quotation.

Switching element without illumination 681 Switching element with illumination 682

Illumination element Equipment consisting of (schematic overview) Lens Illumination element 10 Product can differ from the current configuration. Each Part Number listed below includes all the black components shown in the 3D-drawing. To obtain a complete unit, please select the red components from the pages shown. Additional Information • The customer has to decide what series resistor shall be used to the LED • Luminosity and wave length variations caused by LED manufacturing processes may cause slight differences regarding the illumination Lumi. intensity Wiring diagram • Dimensions with...

Switching element without illumination Equipment consisting of (schematic overview) Each Part Number listed below includes all the black components shown in the 3D-drawing. Switching element To obtain a complete unit, please select the red components from the pages shown. Product can differ from the current configuration. Additional Information • Contact normally open • Switching action momentary 1 • Dimensions with fitted spacing cap see details «Spacing cap» Contact material Wiring diagram Product attribute Component layout Switching element without illumination Switching element without...

Switching element with illumination Switching element Equipment consisting of (schematic overview) Each Part Number listed below includes all the black components shown in the 3D-drawing. Product can differ from the current configuration. Dimensions To obtain a complete unit, please select the red components from the pages shown. Additional Information • Contact normally open • Switching action momentary • The customer has to decide what series resistor shall be used to the LED • Luminosity and wave length variations caused by LED manufacturing processes may cause slight differences...

Front dimensions Lens, Front dimension 19.05 x 19.05 mm Plastic white translucent Lens, Front dimension 15.4 x 15.4 mm Plastic orange translucent Plastic yellow translucent Plastic green translucent Plastic blue translucent Plastic white translucent Lens, Front dimension 12.4 x 12.4 mm Plastic red translucent Plastic orange translucent Plastic yellow translucent Plastic green translucent Plastic blue translucent Plastic white translucent Lens, Front dimension Ø 15.4 mm Plastic orange translucent Plastic yellow translucent Plastic green translucent Kunststoff weiss transluzent

Lens, Front dimension Ø 12.4 mm 70-912.2 Plastic orange translucent Plastic yellow translucent Plastic green translucent Plastic white translucent

Additional Information • The customer has to decide what series resistor shall be used to the LED • Luminosity and wave length variations caused by LED manufacturing processes may cause slight differences regarding the illumination Lumi. intensity Single-LED orange Single-LED yellow Single-LED green Single-LED blue Single-LED white Lumi. intensity Bi-colour-LED, T1 Bi-Pin Additional Information • The customer has to decide what series resistor shall be used to the LED • Luminosity and wave length variations caused by LED manufacturing processes may cause slight differences regarding the...

Drilling plan (element side) Drilling plan (element side) B Holes for LED C Holes for centering pins B Holes for Bi-colour LED: BA1 (green) + BA2 (yellow or red) = Anodes, BC = Cathode C Holes for centering pins Drilling plan (element side) Drilling plan (element side) B Holes for LED C Holes for contact pins Pad max. Ø 2.5 mm Through-connection recommended B Holes for Bi-colour-LED: BA1 (green) + BA2 (yellow or red) = Anodes, BK = Cathode C Holes for contact pins Pad max. Ø 2.5 mm Through-connection recommended

Technical data Switching element illuminated Switching system Short-travel switching system with two independent contact points and tactile operation. Guarantees reliable switching even of very light loads. 1 normally open contact Contact resistance ≤ 100 mΩ as per 500 000 cycles of operation at 12 VDC, 5 mA resistive load ≤ 200 mΩ Electrical life ≥ 500 000 operations at 42 VDC, 50 mA, as per IEC 60512-5-9c When attention is paid to the direction of current flow from terminal 3/4 to 1/2 the electrical life can be prolonged. Material of contact Gold (Au) Switch rating max. 2 VA (resistive...

Technical data Electrical characteristics Switch rating Isolation resistance Contact resistance as per 500 000 cycles of operation at 12 VDC, 5 mA resistive Environmental conditions Storage temperature at 24 VDC, 1 mA > 100 000 operations Operating temperature Switch rating Switching element non-illuminated Part No. 70-201.0 Switching system Electrical characteristics Short-travel switching system with two independent contact points and tactile operation. Guarantees reliable switching e\ very light loads. 1 normally open contact Contact resistance of Starting value (initial) < 100 mQ, as...

Application guidelines Suppressor circuits When switching inductive loads such as relays, DC motors, and DC solenoids, it is always important to absorb surges (e. g. with a diode) to protect the contacts. When these inductive loads are switched off, a counter emf can severely damage switch contacts and greatly shorten lifetime. Fig. 1 shows an inductive load with a free-wheeling diode connected in parallel. This free-wheeling diode provides a path for the inductor current to flow when the current is interrupted by the switch. Without this free-wheeling diode, the voltage across the coil...