MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 1-3
Fuse
A device placed in a circuit designed to open or break the
connection at a specific level of current; a device placed in a circuit
to protect it from dead shorts and spikes in current.
Gateway
A node on a network that serves as an entrance to another network.
In enterprises, the gateway is the computer that routes the traffic
from a workstation to the outside network that is serving the Web
pages.
Gel Cell
A form of electrolyte used in lead acid batteries. A gel cell battery is
a non-spillable design.
Generator
A device that converts mechanical energy to electrical energy,
generally using electromagnetic induction. The source of the
mechanical energy may be a reciprocating or turbine engine or
internal combustion engine.
Hz
Hertz. A unit of frequency defined as one cycle per second.
HTML
Hypertext Markup Language. A standardized system for tagging text
files to achieve font, color, graphic, and hyperlink effects on World
Wide Web pages.
I/P
Internet Protocol. The communications protocol of the public
Internet, many wide area networks (WANs) and most local area
networks (LANs).
Incandescent Light
The incandescent light bulb or incandescent lamp is a source of
artificial light that works by incandescence. An electrical current
passes through a thin filament, heating it and causing it to become
excited, releasing thermally equilibrated photons in the process. The
enclosing glass bulb prevents the oxygen in air from reaching the
hot filament, which otherwise would be destroyed rapidly by
oxidation.
IP Address
An identifier for a computer or device on a TCP/IP network. Networks
using the TCP/IP protocol route messages based on the IP address
of the destination.
LCD
Liquid Crystal Display. The type of display used on the MP2000E.
LED
A light-emitting diode (LED) is a semiconductor device that emits
incoherent narrow-spectrum light when electrically biased in the
forward direction. This effect is a form of electroluminescence. LED
lights are used in traffic signals to replace incandescent lights.
L-N-G
Line-Neutral-Ground. The three conductors in an electrical circuit.
Load
The impedance in a circuit. In a typical traffic intersection the load is
the signal heads and the electrical equipment housed in the signal
cabinet.
MAC
Media Access Control address, a hardware address that uniquely
identifies each node of a network.
