Product Specification Sheet APS1023

Rev. 11/2017

EL642/GB2 Door Panel Audio Module for GB2 System

Architects' And Engineers' Specifications

The GB2 series door panel audio module(s) shall be Alpha Communications┬« / Golmar EL642/GB2, or approved equal. The EL642/GB2 shall be installed inside the Nexa series door panels on a GB2 series system.

The EL642/GB2 shall include 2 available call buttons (for Nexa panels), adjustable voice volume control, 12VDC door release output and N/O relay for other door release voltages and types.

The EL642/GB2 shall be ADA compliant and shall have visual signals to assist hearing-impaired individuals and voices message to assist visually-impaired individuals (in 5 languages), which can be disabled if desired.

Contractor shall observe all local and national electrical and building codes.

EL642/GB2 Door Panel Audio Module for GB2 System

The Alpha Communications┬« / Golmar EL642/GB2 Door Panel Audio Module is used exclusively with the GB2 series systems. The EL642/GB2 is designed to perfectly fit into the Nexa series door panels (aluminum and st. steel/inox versions).

The EL642/GB2 module is ADA compliant, with voice prompts and backlit symbols to assist hearing-impaired individuals.

  • BUS-out connection, 2 wires without polarity
  • 2 inputs for exit buttons to control 2 independent relays (i.e. for Door and Gate)
  • 12VDC output to connect to the door strike or built-in N/O relay
  • Uses simple 2-conductor non-polarized (loop) wiring
  • 2 call buttons available built-in to the module
  • Plug to connect the EL610D modules for additional buttons
  • Communication volume levels adjustable
  • Voice messages for visually-impaired individuals available in 5 different languages
  • ADA Visual signals on the front to notify panel status for hearing-impaired individuals
  • Suitable for Nexa Aluminum and Nexa St. Steel (inox) panel
  • Weather-resistant when used with the Nexa Aluminum and/or Nexa St. Steel (inox) panels
Dimensions: 2.95"W (75mm) x 3.86"H (99mm) x 1.58"D (41mm). 
GB2 Wiring Information
The GB2's system uses simple 2-conductor non-polarized wiring making it ideal for new installations as well as for retrofit applications. All audio, video and data functions are fully digital and using the RAP-2150 (or equivalent) cable you can run up to 300 meters from the entrance panel to the furthest monitor.
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
TOLL-FREE: (800) 666-4800 • Web: • Email:
Copyright© 1998-2019 Alpha Communications® - All Rights Reserved.
Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.