The HW-DA1FBN is a dummy block with full voltage adaptor component designed for IDEC's HW Series 22mm illuminated pushbutton systems. It features finger-safe terminals and is specifically intended for use with odd-numbered contact configurations in multi-deck illuminated pushbutton assemblies. This adaptor serves as a placeholder contact block when an uneven number of contact pairs are required, allowing the lamp circuit to be properly balanced and configured. The HW-DA1FBN integrates seamlessly into the modular HW Series architecture, which includes transformer units, contact blocks, lead holders, safety lever locks, LEDs, and operators. It is commonly used in industrial control panels, signaling systems, and pilot light applications where flexible contact configuration is needed.