Product overview Quantity: 1Pcs Color XBA23550B4 Compatible models XBA23550B4 and HB ADRESS XBA23550B3 What this part does Replacement outbound call board designed for elevator display panels. Provides the interface for floor display and landing call functions on compatible panels. Restores display and call board connectivity when the original component is faulty. Key benefits Direct compatibility: Built to fit elevator display panel model XBA23550B4 and landing outbound call board HB ADRESS XBA23550B3, minimizing fitment issues during replacement. Fast maintenance: Swapin design and matched connector layout reduce elevator downtime and speed up work. Practical spare part: Ideal for service technicians and maintenance teams needing a ready replacement to maintain elevator availability. Important attributes Function Floor display and outbound call board for elevator panels. Compatibility Applicable to elevator display panel XBA23550B4 and landing HB ADRESS XBA23550B3. Quantity Single unit supplied, suitable for one replacement or job. Form factor Designed to match the original component for straightforward installation and reliable connections. Use scenarios Onsite a malfunctioning call board during routine elevator maintenance to restore floor display and landing call operations quickly. Spare parts inventory Keep one unit on hand to reduce waiting time for repairs and maintain continuous elevator service. Workshop testing Use as a test component when diagnosing panel issues or validating display and outbound call signals in a maintenance environment. Notes for installers Verify model numbers XBA23550B4 and HB ADRESS XBA23550B3 before installation to ensure compatibility. Follow standard safety and lockout procedures when servicing elevator equipment.