Specifications

Appendix C - Glossary of Terms RS-422 And RS-485 Applications Ebook
Page 118 of 137 Manual Documentation Number: <DocNumber>
www.bb-elec.com/
www.bb-europe.com/
RDB(+)
Receive Data line B. One of two differential receive lines in RS-422 or Four-
wire RS-485 connections. The (+) line which is high compared to the (-) A line
during the Mark/Inactive state.
Receptacle
A female (socket/jack) connector that accepts pins
Repeater
A device which receives input in one format and restores the signal to standard
levels. May be for RS-232, RS-422, RS-485 or fiber optic signals. Repeaters
are used to increase the number of devices connected to a RS-485 network or
to increase the connection distance by strengthening signals weakened by long
transmission distances (over 50 ft. for RS-232 or 4000 ft for RS-422 or RS-485
communications).
RJ-11
A modular telephone style four-contact connector. Usually male on the
connecting cord, female on devices. The center four positions have contacts
similar to a residential telephone or telephone modem. This is a connector type
only. Devices that use this connector are not necessarily designed for
connection to telephone company phone or data lines. RJ-11 connectors have
been used on some RS-485 systems.
RJ-12
A modular telephone style six-contact connector. Usually male on the
connecting cord, female on devices. The center four positions have contacts
similar to a residential telephone or telephone modem. This is a connector type
only. Devices that use this connector are not necessarily designed for
connection to telephone company phone or data lines. RJ-12 connectors have
been used on some RS-485 systems.