​EAO’s Innovative Series 04 Dual LED Lamp Block

Posted by Reed Prentice on Sep 11th 2020

EAO’s Innovative Series 04 Dual LED Lamp Block

Enhances operating safety with quick,visual warnings by redundant illumination

SHELTON, Conn., Aug. 2020- EAO, the expert partner for innovative, intuitive and reliable Human Machine Interfaces (HMIs), provides a Dual LED Lamp Block accessory for its Series 04 devices to reliably illuminate operational status of equipment with redundant illumination. This modern component integrates two LEDs in a single lamp for visual recognition to increase operating safety in end user control panels.

The Series 04 Dual LED Lamp Block allows one device to display different states in a unique way. With pulsed control of the inputs from two different sources,the dual LEDs appear to be constantly illuminated giving the user rapid, positive feedback of proper operation. However, if one input signal fails (0 VDC), only one source of power will exist triggering the unit to flash as a warning with only one“blinking” or pulsing signal.

Key advantages of the Series 04 Dual LED Lamp Block Include:

  • Two separate LEDs in a single lamp block
  • Available in both 24 and 110VDC versions
  • Different states displayed in one device
  • Warning indication for failure of one input signal (0 VDC)
  • Reliable LED technology enabling a long service life
  • Availability fo rall illuminated EAO Series 04 devices (e.g. Indicators, pushbuttons, selectors, etc.)

For more information on the dual LED lamp block accessory, or any of the other highly-regarded Series 04 products, please visit

About EAO:

Human Machine Interfaces. Since 1947.

EAO AG, a Swiss, family-owned company founded in 1947, has developed into one of the world’s leading manufacturers of high-quality switches, keyboards, sophisticated control elements, and complete HMI control units and HMI Systems. With over 600 dedicated employees, EAO has a global production and distribution network at its disposal. And with production sites in Switzerland, Germany, North America and China, as well as our 11 country sales company and distributors in over 50 countries, we can guarantee global availability.

Your solution-focused expert and partner

EAO does much more than just manufacture individual control elements. As a solution-focused partner, we provide the option of technically and mechanically customizing existing HMI Components in line with our customers’ individual requirements. From simple control elements through to sophisticated HMI Systems, from serial production through to installation – we offer the entire range of HMI services and inspire the confidence of our customers.

For more information, visit our web site at or contact EAO at One Parrott Drive, Shelton, Connecticut 06484; Telephone: 203-951-4600; Fax: 203-951-4601. Send E-mail inquiries to

Contact partner for media:

EAO Corporation Public Relations Agency

Dan DiGioia Derek Beere
Marketing Manager Mason, Inc.
Tel: (203) 951-4600 Tel: (203) 393-1101 x 162