Functional Devices RIB PSB100AB10 Power Supply

The Functional Devices RIB PSB100AB10 Power Supply is a professional-grade solution for building automation systems (BAS) and industrial control panels. Designed to step down 120V AC input to 24V AC output, this 100VA Class 2 power supply provides high-amperage capacity for multiple secondary devices. It is the direct replacement for PSB100AB10-IC, featuring the same open-bracket panel mount form factor for seamless integration into existing NEMA enclosures. A key feature for technicians is the integrated 10A circuit breaker on the primary side, which protects the entire unit—including the 120V convenience outlet and auxiliary output—eliminating the need for separate fuse blocks. The secondary 24V output is also protected by a switchable breaker and includes a red LED indicator for immediate visual confirmation of power status. This panel mount transformer is UL Listed and meets UL916 standards, ensuring rigorous performance in critical HVACR and security applications. With its split-bobbin design, it provides reliable high/low voltage separation within the control cabinet.

• Simplifies Retrofits: Specifically engineered as the direct replacement for PSB100AB10-IC, ensuring mounting holes and wiring align perfectly.
• All-in-One Protection: Built-in 10A main breaker and secondary 24V breakers provide comprehensive overcurrent protection without additional components.
• Field Service Efficiency: Includes a 120V convenience outlet, making it easy to power tools or laptops directly inside the control panel.
• Status Diagnostics: The secondary side LED allows for "at-a-glance" troubleshooting of 24VAC power supply availability.
• Versatile Mounting: Open-bracket design reduces footprint in crowded enclosures while maintaining UL Class 2 compliance.

Is the convenience outlet always powered?
The unit features an internal jumper that allows you to choose if the outlet remains "hot" regardless of the main breaker position or if it is switched by the 10A breaker.

What is the maximum current draw on the 100VA side?
The 24V AC transformer provides up to 100VA, roughly 4.16 Amps at the secondary terminals, suitable for large controller docks and multiple valve actuators.

Can this be used for 277V systems?
No, the Functional Devices PSB100AB10 is strictly rated for 120V AC primary input. For 277V applications, a different model in the RIB series would be required.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.