MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 1-5
RFI
Radio Frequency Interference. A disturbance generated by an
external source that affects an electrical circuit by electromagnetic
induction, electrostatic coupling, or conduction.
RMS
Root Mean Square. The method of calculating the effective voltage
or current of an AC wave.
RS232
RS-232 is a standard for serial communication transmission of data.
It formally defines the signals connecting between a DTE (data
terminal equipment) such as a computer terminal, and a DCE (data
circuit-terminating equipment, originally defined as data
communication equipment), such as a modem. The RS-232 standard
is commonly used in computer serial ports.
Sine Wave
A waveform is a representation of how alternating current (AC)
varies with time. The most familiar AC waveform is the sine wave,
which derives its name from the fact that the current or voltage
varies with the sine of the elapsed time.
SMTP
Simple Mail Transfer Protocol. An Internet standard for email
transmission.
SNMP
Simple Network Management Protocol. A set of standards for
collecting information from, and configuring, network devices, such
as servers, printers, hubs, switches, and routers on an Internet
Protocol (IP) network.
Surgestor
A current (amps) transient suppression device.
TB
Terminal Block. A connector which allows more than one circuit to
connect to another circuit.
TCP/IP
Transmission Control Protocol/Internet Protocol. The basic
communication language or protocol of the Internet.
THD
Total Harmonic Distortion. A measurement of the harmonic
distortion present
TP
Test Point. A point within a piece of equipment or an equipment
string that provides access to signals for the purpose of fault
isolation.
TRL
Traffic LAN
TTL
Transistor-Transistor Logic. A class of digital circuits built from
bipolar junction transistors (BJT) and resistors.
Unqualified
In reference to utility power input, not offering steady power at the
correct voltage.
uC Microcontroller
A computer-on-a-chip used to control electronic devices.
USB
Universal Serial Bus. An external bus standard that supports data
transfer rates of 12 Mbps.
UPS
Uninterruptible Power Supply. A secondary power supply used to
maintain power in the event of a loss of utility power.
V
Volt. A unit of measure for potential electrical energy.
