The Honeywell ZLDC04B is a zone damper control module designed for HVAC zoning systems. It provides 24V AC power and control signals to motorized dampers, ensuring precise airflow regulation in different zones. Compatible with Honeywell zone control panels, it integrates seamlessly with thermostats and automation systems for efficient temperature management. The module features LED status indicators for easy troubleshooting and supports DIN rail or surface mounting for flexible installation.