Specifications

Appendix C - Glossary of Terms RS-422 And RS-485 Applications Ebook
Page 102 of 137 Manual Documentation Number: <DocNumber>
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Bus limit
The number of nodes that can be added to a network before a repeater is
required, or the maximum number of addresses that can be supported.
C
CD
In RS-232 ports and devices, the CD is the Carrier Detect line from a modem
(also called Data Carrier Detect, or DCD). When a modem answers the phone,
it looks for the modem carrier, then sets the CD line active when the carrier is
present. The computer monitors that line to know when to try connecting or
when to hang up if the carrier is lost.
CE
The CE mark indicates compliance with the regulatory requirements of the
European Union. All of our products meet the requirements of the US FCC.
Those with the CE mark have gone through the additional susceptibility tests
required under the European EMC directive.
Channels
In serial communications a channel is a path for communication. One path
is usually transmit, another is receive. Receive and transmit are two
channels. RS-232 can have several other channels including the RTS, CTS,
DTR, DSR, CD and RI handshake channels. In a multi channel RS-422
converter, each channel uses one twisted pair of wires, and all channels
share a common signal ground wire.
A path of communication or access point for software connection.
A range of radio frequencies used by a transmitter/receiver during
communication or broadcasting or reception. Each channel can be set or
preset.