Emerson 375 User Manual page 130

G-vi
NiMH Battery Pack
A Nickel-Metal Hydride (NiMH) battery used to power the 375 Field
Communicator. It has a black, 4-pin power supply/charger connector. See
Figure 2-3 on page 2-11 for the location of this connector.
Online Licensing
A feature in the Easy Upgrade Programming Utility to select and download
new licenses that enable additional functionality in the 375 Field
Communicator. You can order and download licenses for the F
OUNDATION
Fieldbus Application, Easy Upgrade option, and the Graphics option. See the
Easy Upgrade Programming Utility online Help for more information.
Personal Computer (PC)
Synonymous with microcomputer, a computer that serves one user in the
office or the home.
Polling
A method of sequentially interrogating a network to determine which devices
are present.
Process variable (PV)
A process parameter that is being measured or controlled (for example, level,
flow, temperature, mass, or density).
Segment (Fieldbus only)
The section of a fieldbus that is terminated in its characteristic impedance.
Segments are linked by repeaters to form a complete Fieldbus.
Shout/deaf mode
A communication mode in the 375 Field Communicator where the amplitude
of the 375 signal is increased to help it communicate with devices on a noisy
loop. The 375 Field Communicator determines when to enter this mode.