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| Rack-Mount UPS |
| UPS that can be mounted in a rack along with servers,
hubs, and other devices. |
| Rated Rectifier Current |
| The maximum output current of a rectifier at 58V
for a 48 V (nominal) rectifier, or 29 V for a 24 V (nominal)
rectifier. |
| Raw Power |
| Electrical power which may or may not contain
unwanted electrical signals. |
| Receptacle |
| A contact device installed at an outlet designed
to accept a single plug. Receptacles on the rear of a UPS accept
plugs from supported system equipment such as computers or monitors. |
| Rectifier |
| A module fitted to the Intergy power system that
converts AC input power to regulated DC output power. |
| Rectifier Bus |
| The bus to which the outputs of the rectifiers
are connected. |
| Rectifier Magazine |
| A module in the Intergy power system used to connect
the rectifiers to other modules in the Intergy power system. |
| Rectifier Voltage |
| The voltage to which the rectifiers are set. This
is assumed to be the same for each rectifier and does not include
current share adjustments. |
| Redundancy |
| Duplication of elements in a system or installation
to enhance the reliability or continuity of operation . |
| Regulation |
| A method of limiting voltage to a narrow range. |
| Reserve |
| Battery time remaining to end of discharge |
| RFI |
| Radio Frequency Interference |
| RM |
| Rectifier Magazine |
| RS-232 |
| Also called serial ports; a method of communicating
digital information in which the data bits are transmitted sequentially
over one line. |
| RS-232C |
| A common point-to-point hardware configuration
for serial communications. |
| RS-485 |
| A multidrop hardware configuration for serial
communications. There is no intrinsic method of bus collision
detection in RS-485, so higher layers in the protocol stack
must take this into account. |
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| Scalable UPS |
| A UPS that allows for expandability; for example,
enables a UPS to accommodate a larger load by purchasing additional
power modules. |
| Simple Network Management Protocol (SNMP) |
| A request–response protocol that collects
management information from network devices and provides a way
to set and monitor configuration parameters. |
| Sine Wave |
| The sinusoidal wave form exhibited by alternating
current. |
| Single-Phase Power (1Ø) |
| Power that is provided by a single source which
normally includes one hot lead and a grounded return line (neutral) |
| Slope Discrimination Method |
| A scheme that causes the Overvoltage Shutdown
set point to fall with increasing load. |
| SNMP |
| Simple Network Management Protocol |
| Square Wave |
| Output waveform generated by very basic, low-cost
UPSs. Functions adequately for less sensitive loads, but may
not provide acceptable quality input for some types of electronic
equipment. |
| Standby Power System |
| See Off-Line UPS. |
| Start-On-Battery |
| Enables user to power up UPS in the absence of
utility power. |
| Start Up Delay |
| The interval between power on and the start of
current walk in. It is the sum of the Primary Enable Delay and
the fixed and adjustable portions of the Output Enable Delay. |
| Status LEDs |
| Light Emitting Diodes (LEDs) that show the status
of the UPS when they light up or turn off. |
| Step Wave |
| (Modified Sine Wave) Enhanced version of square
wave that provides adequate input for some more sensitive loads,
but still not as high quality as a sine wave. |
| Supervisory Module (SM20, SM30 or SM50) |
| The module that monitors and controls the operation
of the DC power system |
| Surge |
| A transient (or momentary) wave of current, potential,
or power in an electric circuit. |
| System Voltage |
| The nominal voltage of the Intergy power system,
equal to the nominal voltage of the rectifier modules. 48 V
or 24 V. |
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