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PSX2 Power Shield Circuit Breakers

DCC Specialties PSX2 Circuit Breaker


MSRP: $89.90

Product Description

PSX Manual
Model Railroader PSX Review
Download PSX Hints & Tips
PSX vs. OnGuard
TTX Screw terminals For PSX
PSX Funtionality Test
NCE Power Cab & ESU Programmer with PSX Circuit Breaker for Bench Programming
PSX & PSX-AR Manual Reset Push Button Switch

PowerShield X Series Circuit Breakers for DCC
You can purchase your PSX Circuit Breakers in four configurations:

PSX1 DCC Solid State Power District Circuit Breaker, 1 Block, 0-20 Amps.
PSX2 DCC Solid State Power District Circuit Breaker, 2 Block, 0-20 Amps/Block.*
PSX3 DCC Solid State Power District Circuit Breaker, 3 Block, 0-20 Amps/Block.*
PSX4 DCC Solid State Power District Circuit Breaker, 4 Block, 0-20 Amps/Block.*
*The PSX circuit boards are scribed and milled so you can seperate [for example] a PSX4 into four individual boards if necessary.

The PSX is designed to specifically handle low power starter systems by simply jumping pins J6-1 & J6-2 together. This applies specifially to:

  • NCE Power Cab
  • Digitrax Zephyr

If you use AC power [Lionel, MTH, and American Flyer AC] order the PSX-AC. Contact us first if you have any questions.

All PSX Series DCC Circuit Breakers include Network Feedback, Shorted and Occupancy Status to  Digitrax LocoNet, Lenz ExpressNet and NCE Cab Bus.

As delivered from the factory, the PSX-1’s trip current is 3.81 amps. You can adjust it from 1.27 amps to 17.8 amps easily via programming or jumper connections on the board

  • The PSX series has the most reliable operating features that protect model railroad equipment and wiring from damage during a short circuit, including fast-acting, solid-state electronics.
  • The Power Shields are available in 1, 2, 3, and 4 circuit-breaker models, allowing you to divide the output of a single booster into independent power districts.
  • The PSX circuit board is wired between the DCC system’s booster and the track bus
  • The PSX includes screw terminals for easy connections from the booster and to the track. There is also an extra pair of terminals for linking the booster power input wires to additional PSX breakers should you need to add extra PSX protected power districts
  • The PSX models have a wealth of new programmable features such as occupancy detection and adjustable trip current making them much more than simple circuit breakers.  
  • With Adaptive Load Reset the PSX breaker can tell the difference between a short circuit and power hungry sound decoder capacitors, a welcome relief for many sound frustrated model railroaders.
  • The PSX also offers a lot of great advanced features such as panel mounted LED indicator lights and switches for resetting the breakers manually just involve connecting wires and components to the PSX.

Protected by U.S. patent numbers 7810760, 7810761, 7810435.

DCC Specialties is so confident about the PSX’s quality and performance that they are providing a 1 year “Goof Proof Warranty”.

The PSX series is a product of Larry Maier’s 10 years experience in designing and producing intelligent, solid state, DCC circuit breakers and auto reversers. The PSX specifically addresses the increased inrush loads (currents) which occur due to large capacitors used for sound systems. This load appears as a system short circuit until the capacitors are charged. The logic in the PSXs determines if the load is a true short or just an inrush overload.

Customer Comments:

“I was having a new furnace installed and the furnace crew, while I was upstairs answering the phone, ran around in haste flipping every switch they could find in the basement to test out some electrical circuits. They turned on the railroad while all the metal items they dropped on the track were all over the place. Naturally, I had no idea the railroad was on, and it remained in a state of constant shorting for well over 2 weeks. I unplugged the system, but wondered if it would ever work again.

You see, when my friend and I finally were able to reach the railroad system area to begin testing for problems, we fully expected all of Tonys Trains Powershields to be dead. We also expected the NCE system and booster to be dead. Upon turning on the system we found disappointing strange glowing lights, no track power, and no other signs of life. Eventually, we tried to reset one of those fancy computer circuit breaker multi plug in boxes that was used to plug everything in to. This test was met with a loud pop, a bang, and was complete with blue smoke. The thing was dead.

After carefully testing each item out, all plug in circuits, etc, we then came to the point where we could plug the system back in to a new surge protection strip. Much to our surprise the system not only came up, but all systems were working fine.

When I realized that while one of those expensive computer surge protection boxes had taken a major hit, and that instead every single one of Tonys Trains Powershields, used to protect each town in the event of a short, had protected the railroad and all operating equipment, and had even survived themselves for well over 2 weeks of constant shorting.”– Bob D.

I received my new PS-X 4-circuit circuit breaker yesterday, and installed it today in place of my existing 3-circuit circuit breaker. I purchased your new one because it was advertised as being able to handle the inrush current of sound-equipped locos, and it worked beautifully! I am using an NCE PowerHouse Pro system, and when a short-circuit occurred, I had to shut down the system using the Emergency Stop button on the ProCab. Disrupting to the operating session to say the least! My ‘acid test’ consisted of shorting out the power district containing at least three sound equipped locos, removing the short, and watching the system come on automatically. This is EXACTLY what I have wanted for a long time (well, since I got into DCC). Thanks again.” – Don M

“Figured I’d let you know. Got the PSX-AR and replaced the digitrax AR-1. Took 5 minutes. The sound decoder that wouldn’t make the loop before works perfectly! So, for what it’s worth, at least with the NCE Power Cab, this makes a HUGE difference with sound decoders. And, it’s definitely quieter and smoother with all my engines. Thank you.” – Mike C. 

I’ve seen a demo of one of the new ‘adaptive’ breakers from DCC Specialties that was nothing short of phenomenal. We had no less than 14 sound locos in the district – more than half of them older QSIs … and it recovered from a quarter test short without having to roll any of the locos off of the track! The breaker just kept feeding the power “slowly” until everything was running normal. And it was a reversing section and it worked just as well when reversing. We just could not create a scenario where the breaker would fail to recover. So – if you’ve got one of those beautiful lighted Cal Zephyrs and an ABBA set of sound-equipped Fs to pull it … this breaker will allow your layout to come back to life normally after I or someone just like me blows a switch. I know -you- never do this but you see I’m an old fart who can’t see very well and so this happens more often than I wish. So, if recovering from shorts is a problem for you … this is one suh-weeeeeet breaker!

– Jim B., California


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