DCC Specialties PS 1 Series

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PSXX Manual Rev: A Software Rev: F

* info@tonystrains.com

*Designed by Larry Maier

*Developed by DCC Specialties

*US Patent 7,810,435

For DCC Use Only

New! Advanced Circuit Design

New! Current Limiting

New! Automatic Timing Delay

New! Block Occupied Functions

The PSXX Circuit Breaker uses a new advanced design to provide a new level of over-current

protection for your layout. Before the advent of the PSXX, all circuit breakers used a simple

low resistance switch to turn off the current if it exceeded a set value. The layout is protected,

but for the time between the onset of the short and the output switch turning off, the fault is

connected directly across the booster terminals affecting all blocks connected to the booster.

The booster will supply up to its maximum current trying to maintain the track voltage.

Currents as high as 48 amperes can result, depending on your booster and wiring. The large

current draw then means there is no current left for any other block even if they are protected

by their own circuit breakers.

The PSXX series is a product of years of research into problems dealing with false overloads

that cause premature shut down of DCC Boosters and other Circuit Breakers. These false

overloads are caused by large capacitors used in sound systems, decoders and lighted

passenger cars. The overload appears as a short circuit until the capacitors are charged. The

PSXX Series determines if the load is a true short or just an overload due to a discharged

capacitor.

PSXX Versions Available: PSXX-1, PSXX-2 & PSXX-3

● 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.

● Power On/Off by DCC: Turn on/off output track power with your DCC Throttle!

The PSXX-1,2,3 Series

DCC Circuit Breaker

Intelligent, Solid State

Block Detection and Network Feed Back

Manual Rev A [01.22, Software Rev F [07.22]

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Summary

PSXX Series Introduction

Key Product Features

Highlights advanced design, current limiting, and automatic timing delay for superior over-current protection.

PSXX Circuit Breaker Capabilities

Adaptive Overload Reset

Distinguishes true shorts from capacitor charging overloads for reliable operation.

Block Detection and Control

Enables block occupancy detection via photocell or current, with programmable trip points.

PSXX Illustrated Diagram

Component Identification

Labels key components and connectors on the PSXX circuit board for reference.

User Guidelines and Programming Overview

User Guidelines

Basic advice for wiring, isolating gaps, and testing PSXX functionality.

PSXX Wiring and Connectivity

Daisy Chain Wiring

Illustrates connecting multiple PSXX units and PSX-ARs in series for layout power distribution.

Power District Design

Determining Power Districts

Guides on segmenting layouts into power districts for effective circuit breaker protection.

Multi-Booster Schematics

Layout Power Distribution

Shows wiring diagrams for multi-booster setups with PSXX units.

PSXX Wiring Specifications

Wire Gauge Recommendations

Specifies recommended wire gauges for bus and feeder connections based on scale.

PSXX Terminal Wiring Descriptions

Terminal Functionality Overview

Details the function and wiring of various PSXX terminals for connectivity.

PSXX Accessory Address Configuration

Setting Accessory Addresses

Step-by-step guide to assign accessory commands for track power and photocell functions.

Advanced PSXX Photocell Functions

Photocell Control Modes

Explains using photocells for staging control and block occupancy detection.

PSXX CV Programming and Settings

Programming CVs via POM

Instructions for programming Configuration Variables using Programming On Main (POM) mode.

CV Settings for Block Control

CV50 Block Occupancy Method

Configures block occupancy detection via block current or photocell.

Additional CV Settings

CV66 Power Up Control

Controls PSXX track power output state upon booster power-up.

CV63 Factory Reset

System Reset Procedures

Details the process to reset the PSXX to factory default settings.

Digitrax System Programming

Setting Addresses and Programming CVs

Step-by-step guide for Digitrax throttles to configure PSXX addresses and CVs.

Lenz System Programming

Setting Addresses and Programming CVs

Step-by-step guide for Lenz throttles to configure PSXX addresses and CVs.

NCE System Programming

Setting Addresses and Programming CVs

Step-by-step guide for NCE throttles to configure PSXX addresses and CVs.

MRC System Programming

Setting Addresses and Programming CVs

Step-by-step guide for MRC throttles to configure PSXX addresses and CVs.