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SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
SSCC:
Solid State Crossing Controller
SSR:
Spread Spectrum Radio
– A radio that utilizes spread spectrum
transmission.
Supervisor Password
The password set that allows application design personnel access to office
editable parameters
.
Track Speed Train
A train that proceeds through the approach at the maximum authorized speed.
True RMS AC+DC:
A scale on a multimeter that measures the effective combined AC and DC
portions of the total voltage. Used to measure the pulsed output of a crossing
controller. Measured as VRMS.
TX:
Transmit
USB Port:
Universal Serial Bus
Port
USB Drive:
Types of memory devices that plug into a USB port. These devices are
commonly called flash drives or memory sticks.
VHF Communicator:
Communications device used for remote operations and calibration as well as
data communications.
VLP:
Vital Logic Processor
– One of two microprocessors on the CPU III
module, processes GCP vital system logic.
VRMS
Volt Root Mean Square
– See True RMS AC + DC above.
WAG
Wayside Access Gateway
– The Siemens A53457 assembly converts
Echelon® messages to Ethernet messages allowing Siemens
equipment to use Ethernet Spread Spectrum radios A53325 for
communications. WAG assembly A53457 also converts Echelon
received messages to RS232 messages allowing the system to use
modems for communication between Siemens equipment.
WAMS:
See RailFusion
.
WCM:
Wayside Control Module
– The Siemens A53105 assembly that centrally
controls the functions of a Wayside Communications Package (WCP).
Wrap:
A common reference for a track circuit, or combination of track circuits that
extend to or beyond the limits of a GCP approach, which provides train
detection.
Used to signify that a certain system function is being overridden based upon
the state of a vital input.