Table of Contents
Advertisement
BASIC APPLICATION GUIDELINES & PROGRAMMING
_________________________________________________________________________________________________________
application, the Module is capable of performing the Directional Stick Logic, drop delay, and
Stick Cancel functionality. The Module provides configurable receiver and island pickup delays.
The Module has the flexibility to use external inputs instead of or in addition to the internal PSO
receivers and island. For instance, if the installation already has a track circuit in place (e.g. a
DC track circuit), this could be used in place of one of the approach receivers. Either of the PSO
receivers and/or the Island may be enabled or disabled. The Island function supplies a limited
distance audio frequency track circuit with an effective range between 120 to 500 ft. (36.6 to
152.4 m). The island circuit performs a similar function as Siemens's Model 71150 Intelligent
Processor Island Track Circuit (IPITC) and the Intelligent Processor Island Track Circuit II. While
designated primarily for use as the island track circuit at highway crossings, the system satisfies
any application requiring a short, high-definition, audio frequency track circuit.
The PSO Module is available with up to five address codes and a wide variety of carrier
frequencies. Sixteen PSO Module carrier frequencies, ranging from 156 Hz to 4000 Hz, are
available for use in non-electrified territory and an additional 31 common frequencies, ranging
from 500 Hz to 10200 Hz, typically used by non-Siemens equipment, are also available for use.
For electrified territory, ten frequencies are available ranging from 645 Hz to 4000 Hz. Fourteen
standard island frequencies are available for the Island functionality and range from 2.14 kHz to
20.2 kHz; an additional 15 alternate island frequencies used by non-Siemens equipment that
range from 2.3 kHz to 10.2 kHz are also available. For installations where multiple circuits are
required on the same track, the PSO Module has two sets of eight frequencies (five for
electrified territory) each that can be connected as required with negligible interference.
In applications requiring broken rail detection, a Receiver Threshold adjustment is available.
This allows for adjustments to be compatible with the leakage paths associated with propulsion
return circuits. With specialized coupling units, the PSO 4000 units may also provide line
overlay applications
5-2
SIG-00-22-02
JUNE 2022 (Revised September 2022)
Version: B.1
Advertisement
Chapters
Table of Contents
