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ERLCDC - Edwards / GS Building Systems: Home Audio & Theater. Buy ERLCDC - Edwards / GS Building Systems: Access-Control Keypads - ✓ FREE DELIVERY possible on eligible purchases. LCD PANEL. FIRE ALARM ,EDWARDS/GS BUILDING SYSTEM 。 Features • LCD models feature large x 20 character backlit LCD display • LED models provide 1 pairs of LEDs for zone annunciation • Available expander extends capability with 2 pairs of LEDs • Up to two expanders may be wired to each annunciator • Status LEDs and internal buzzer standard on all models • Common controls available for LED and LCD display models • Available keyswitch for disabling common controls • Standard -inch square electrical box mounting • Class B or Class A RS wiring standard • One-, two-, and three-position enclosures available • Graphic Annunciator interface, includes common control, indicators and 32 LEDS • No programing required, set the address and unit recieves all information from panel 。 。 。