MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 1-4
Maintenance Free
Battery
A sealed battery that requires no service. The battery is sealed so it
requires no water to be added.
Mask
A 32-bit number used to differentiate the network component of an
IP address by dividing the IP address into a network address and
host address.
MBPS
Maintenance Bypass Switch. A stand-alone switch used to manually
isolate the MP2000E BBS module from utility power and the
intersection controller. It facilitates maintenance and BBS
replacement operations without turning off power to the loads.
MIB
Management Information Base. A database used for managing the
entities in a communications network.
MOSFET
Metal Oxide Semiconductor Field-Effect Transistor. An isolated gate
switching device.
MOV
Metal Oxide Varistor. A voltage transient suppression device.
MPP or MEPS
Myers Emergency Power Systems.
MTBF
Mean Time Between Failures. A measure of hardware product or
component reliability.
mV/°C/Cell
Millivolts Per Degree Celsius Per Battery Cell. The unit of measure
for the ratio of the change in breakdown voltage to changes in
temperature.
OEM
Original Equipment Manufacturer.
OHM
Unit of electrical resistance. An ohm is a resistance that produces a
potential difference of one volt when a current of one ampere is
flowing through it.
Ohmmeter
A device or instrument for measuring resistance in an electrical
circuit.
Pb
The chemical symbol for lead.
PFC
Power Factor Correction. A feature included power supply boxes to
reduce the amount of reactive power generated.
Polarity
The positive pole and negative pole designation of a DC circuit such
as in a battery.
PTC
Positive Temperature Coefficient. A type of thermistor (is a type of
resistor whose resistance is dependent on temperature) in which
resistance rises suddenly at a certain critical temperature.
PTS
Power Transfer Switch. A device that moves the electrical load from
one power source to another.
Qualified
In reference to utility power input, offering steady power at the
correct voltage.
Resistance
The opposition of a circuit or conductor to allow the passage of
electrical current.
