ABB Totalflow NGC8206 Manual Del Usuario página 297

TERM
Recommended
Standard 422
Recommended
Standard 485
Record
Register
Relay
Remote
Remote Controller,
XSeries.
Remote Terminal Unit
Repeatability
Residue Gas
Resistance
Resistance Temperature
Characteristic
Resistant Thermal
Detector
Resistor
Resolution
2103650-001 – rev. AB
This is the standard interface for half-duplex communications
conducted with a dual-state driver. It employs balanced signaling and
refers to multi-drop communications between one driver and up to ten
receivers, known as "straight-through" cabling in a 4-wire bus system.
The RS-422 (Differential) transmits a much faster data rate (up to 100K
bits per second) and longer distances (up to 4000 Ft. @ the maximum
data rate).
This is the standard interface for half-duplex communications
conducted in the tri-state or common mode. It employs balanced
signaling and refers to true multi-point communications between up to
32 drivers and 32 receivers, in 2-wire bus system.
The RS-485 (Differential) transmits a much faster data rate (up to 100K
bits per second) and longer distances (up to 4000 Ft. @ the maximum
data rate). It also supports more nodes per line because it uses lower
impedance drivers and receivers.
A collection of unrelated information that is treated as a single unit.
A storage device with a specific capacity, such as a bit, byte or word.
Electromechanical device containing a coil and set of contacts. The
contacts close when the coil is activated.
Not hard-wired; communicating via switched lines, such as telephone
lines. Usually refers to peripheral devices that are located a site away
from the CPU.
Totalflow's XSeries Remote Controller is a low power, microprocessor
based unit designed to meet a wide range of automation, monitor,
control, alarming and measurement applications.
An industrial data collection device similar to a PLC, designed for
location at a remote site, that communicates data to a host system by
using telemetry (such as radio, dial-up telephone, or leased lines).
The ability of a transducer to reproduce output readings when the same
measurement value is applied to it consecutively, under the same
conditions, and in the same direction. Repeatability is expressed as the
maximum difference between output readings.
The portion of natural gas remaining in a gaseous state after recovery
of certain components through gas processing.
The measure of the ability of a material to pass a current.
A relationship between a thermistors resistance and the temperature.
A metallic probe that measures temperature based upon its coefficient
of resistivity.
Passive component with a known resistance. The value of resistance is
usually shown by a set of colored bands on the body of the component.
The smallest significant number to which a measurement can be
determined. For example, a converter with 12-bit resolution can resolve
1 part in 4096.
DEFINITION
Página B–51