Specifications

Appendix C - Glossary of Terms RS-422 And RS-485 Applications Ebook
Page 108 of 137 Manual Documentation Number: <DocNumber>
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characters back, the user does not know what is being typed. The Echo On
setting turns on local echo so that typed characters can be viewed. If they
are echoed by the remote device, each character is repeated. If typed
characters are repeated twice for each character typed, local echo should be
set Off.
EMI/RFI
Electro Magnetic Interference/Radio Frequency Interference: signals generated
by expanding/collapsing magnetic fields such as motors, transformers, arc
welding, fluorescent/neon lighting, radio/television Transmitters, motor
brushes, lightning.
EMI/RFI Immunity
The level at which a device or signal is unaffected by EMI/RFI
Externally Powered
Requires connection of a power source such as AC or DC. The required
power source is rated for the type of voltage in volts (VAC or VDC), and the
required current in mA (milli-Amps), A (Amps) or VA (Volt-Amps)/Watts.
A externally powered converter that does not support Port Power must
obtain power though connection terminals, a DC jack or connector pins.
Isolated converters may require port power for the RS-232 side, a power
supply for the RS-422/485 side.
F
Female (Connector)
Connector which has a receptacle socket (holes) for pins. When F follows the
connector type, the connector is a female connector.
Flow Control
The process of managing the rate and direction of data transmission between
two nodes.