The new PSXX has all of the features of the original PSX. However, the PSXX has a new and unique feature that no other circuit breaker or fuse (to our knowledge) possesses. When you set the trip current, which can be set in integer increments from 1 to 10 amperes, you not only set the current at which the breaker will shut off, you also set the maximum amount of current that the breaker will allow to flow.

  • Advanced Circuit Design Limits Current to selected current value before circuit opens regardless of severity of fault
  • Current Limiting will charge sound decoders without exceeding booster current capability
  • Default Current Limit/Trip Current 2 amperes will work correctly for most layouts.
  • Select Trip current values 1 – 10 in integer steps (1, 2, 3, …., 10) using CV 49
  • Jumper Select Current limits of 1, 2, 3, or 4 amperes
  • PSXX circuit boards are perforated with score lines so you can physically separate and divide PSXX-2, & PSXX-3 into individual PSXX-1 units if needed
  • 4 Indicator LEDs: Booster power (green), Block power (green), Block shorted (red), Block current limiting (blue)
  • Outputs for LED Indicators: Remote LEDs can be added to monitor the input/output power and the status.
  • +5V and Ground Outputs for powering LEDs, no resistors needed
  • Output for Aud io Alert: An audible sounder can be added to the PSXX to provide an audible alert if there is a short.
  • Power On/Off by DCC: Turn on/off output track power with your DCC Throttle!
  • Manual or Automatic Reset: Automatic reset: Breaker tries to reset every 2 seconds. Manual reset: Once the breaker trips, it remains off, ensuring complete isolation of the faulty block. The breaker is reset either by a switch or by a DCC command.
  • All Solid State Operation: Fast, solid state design with reliable quiet action.
  • Adaptive Load Reset: Electronically determines if the overload is a real short or due to excess capacitance in sound decoders or lighted passenger cars.
  • Auto Stop with DCC Reset: A photocell can be connected to a PSXX input. Normally, covering the photocell will not cause any action. If the photocell is armed with a DCC command, the PSXX will turn off the next time the photocell is covered. A DCC command can restore the track power when desired.
  • Photo Cell Controlled Block Power Off: Stop position control and occupancy detection for hidden tracks.
  • Block Detection: Either a photo cell or block current draw can be used to detect a train in a block and to trigger a Block Occupied output. The current trigger level is programmable.
  • Block Occupied Trip point can be automatically set to compensate for current flow in unoccupied block
  • Very Low Voltage Drop: Total breaker on resistance is less than 0.060 ohms, so the PSXX has a very low voltage drop even at high currents. Better than detectors that use a diode voltage drop.
  • Programmable Power Up Status: When power is applied to the layout, the PSXX can be set to always turn on, always remain off [power on as needed by DCC command], or to use the power status present when the layout was last shut down.
  • Network Feedback: Isolated outputs designed to provide Block Occupied, Block Shorted, and Power Status to a discrete interface for remote display or computer control. Will work with Digitrax LocoNet, NCE Cab Bus, ESU ECoS, and Lenz XpressNet interfaces.
  • System Reset: CV63=42 sets all CVs and addresses to original factory values.
  • No Power Supply Needed: The PSXX uses the track DCC power to supply its operating power. Each PSXX draws less than 0.04 amperes.
  • Easy to Install: With 4 mounting holes sized for a #6 screw.
  • Flash Programmable: The PSXX firmware can be updated by Tony’s Train Exchange as new features become available or if older units need to be matched to a recent purchase.
  • Discrete Input allows on/off control of track voltage for yard or other track section isolation. Compatible with any system that has a relay or isolated transistor control output including LCC, WiFi, etc. or can be used with manual toggle switch.
  • Power On Status can be on, off (yard or staging sections), or status at power down.
  • DCC Accessory Command Control on any Accessory address 1 – 2042.
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The PSXX is compatible with PSX-AR and previous generation PSX-1,-2,-3,-4 circuit breakers. If you are using both PSXX circuit breakers and PSX-AR auto reversers on a layout, make sure the PSX-AR J1 input is taking power from the J2 DCC track output of the PSXX.
Below are some essential wiring diagrams for multiple power districts, boosters, and wyes.