Schneider Electric XVBC21 Programmable Relay Module

Schneider Electric Harmony XVBC21 signaling kit combines the XVBC21 70 mm base unit (with cap) with a red XVBC4M4 beacon and the DL1-BKG4 backbox, delivering a complete modular tower-light assembly for 70 mm signaling columns. XVBC21 is the base unit designed for Harmony XVB signaling towers and supports direct or tube mounting with bottom- or side-entry cabling. The XVBC4M4 red beacon module is a flashing light compatible with 230 VAC operation and accommodates incandescent or LED sources. The DL1-BKG4 backbox provides the enclosure and mounting hardware to finish the installation, making the kit suitable for industrial control panels, machine status indication, and process-line signaling.