Power Shield X

DCCWiki, a community DCC encyclopedia.

The Power Shield X series is a DCC Power Management device. The PSX will handle the increased inrush 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 newer PSXs determines if the load is a true short or just an inrush overload.

The Power Shield X (PSX) is the continuation of the Power Shield series of power management devices.


There are several versions of the PSX:

  • PSX-AR, with integrated stall motor decoder
  • PSX-ARFB, with network feedback
  • PSX-ARSC, with integrated snap switch decoder
  • PSX-ARSCFB, with network feedback.
  • PSX-AR-AC, for 2 rail AC.

The PSX series also includes 4 DCC power district circuit breakers. They are identified as PSX-x, where the x indicates how many blocks they can control, from 1 to 4.


Compatible with 2 Rail AC.

  • Automatic Coordination of Auto Reverse and Circuit Breaker Tasks: It is both a auto reverser and a circuit breaker. Fast, all solid state design with reliable quiet electronic reversing, no blinks, clicks or sparks!
  • Adaptive Load Reset: Electronically senses if the overload is a real short or due to in-rush capacitance of sound decoders.
  • Automates Reverse Loop Turnouts: Integrated stall or solenoid decoder, automatically lines up turnouts when the polarity reverses. Switch machine can be controlled accessory commands or push buttons as well.
  • Manual or Automatic Reset
  • LEDs can be added to monitor; input/output power and status.
  • Trip currents adjustable by jumpers or CVs: 1.27 to 19.2 A
  • A single CV command sets all Addresses and CVs to original factory values.
  • An audible sounder can be added to the card to alert you when there is a short.
  • Low Current booster reset if needed
  • Auto Stop with CV Reset: A photocell can detect a train in the reverse section and turn off power. A DCC command can then restore the power
  • Board size: is 5 3/4 by 3 3/4 inches


All of the PSX-AR features plus

  • Feedback: Shorted and Occupancy Status to Digitrax (LocoNet), Lenz (XpressNet) and NCE (CabBus)
  • Block Occupancy Outputs: Indicates block is occupied or shorted
  • Occupancy Amps adjustable

All PSX series devices also include network feedback


The DCC Specialties Website has a lot of information and more DCC items as well. Main Website
PSX Manual
PSX User Shares Layout Information
Controlling Hidden Staging with the PSX Series Power Sheild X Hints and Tips