null Skip to Content
Share with a friend:

Ring Engineering PBM-2 RailPro Power Back-Up Module

$39.95 $32.99
(You save $6.96 )
Availability: Usually Ships in 2 to 3 Business Days
Current Stock Level:
Current Stock Level:
Share with a friend:


A PBM can be added to a HO model train locomotive so that if the model train wheels loose connection from the track because of dirty track or other problems, the Power Backup Module will supply power to the Locomotive Module for up to many seconds to keep operating properly without sounds, lights, or even motor stopping!

What is special about the RaiPro PBM is that the PBM is an active power backup not a passive one like many other power backups. Many others are basically just super capacitors that the voltage drops exponentially as soon as the power is removed. With other backups, lights continually dim and module performance is effected. Our PBM has onboard microcontroller and other electronics that will output a fixed voltage similar to a good power supply output so lights stay constant while PBM is active and locomotives perform better.


Simple Connection with Only 2 Wires
Size: 1.27 x 0.66 x 0.32 inches

Run time lights only: ~18 Seconds
Run time lights and sounds: ~14 Seconds
Run time lights, sounds, and pulling a train: Varies greatly depending on locomotive, speed, load etc.




We've been helping hobbyists realize their dreams for over 100 years! From our early days as a general hardware store in Baltimore, Maryland, to now, as a leading name in the model train business. With thousands of products available in all scales from O to Z, we have everything you need to build, maintain, and expand your railroad empire.

Icon Top Rated

Top Rated

We're known internationally for our knowledge, service and reliability.

Icon Curated by Experts

Curated by Experts

We don't just sell trains; many of our staff members are railfans themselves!

Icon Great Customer Service

Great Customer Service

Our experts are always ready to assist with any questions you might have.

Frequently Bought With


Instagram Feed

Share your layout and purchases with our community! Simply tag us in your photos on Instagram for the chance to see them appear here!

Follow Us

Need help with a product?

Our friendly customer support people are eager to take your call!

Contact Us