Rockwell Automation 1732E-IB16M12SOEDR EtherNet/IP ArmorBlock supporting Sequence of Events - Manual (Page 112)

Publication 1732E-UM002A-EN-P - March 2010
104 Glossary
MCR
Master Control Relay. A mandatory hard-wired relay that can be de-energized
by any series-connected emergency stop switch. Whenever the MCR is
de-energized, its contacts open to de-energize all application I/O devices.
MCU
Microcontroller. Microcontroller, an embedded microcomputer which handles
most module functionality.
Mini
A family of sealed 7/8 inch connectors. Larger than the Micro style connector,
the contacts are rated for 7...12 A and 600V.
mnemonic
A simple and easy to remember term that is used to represent a complex or
lengthy set of information.
modem
Modulator/demodulator. Equipment that connects data terminal equipment
to a communication line.
modes
Selected methods of operation. Example: run, test, or program.
module tags
Information about the I/O module. Tags may consist of several items, each
defining some aspect of the module.
negative logic
The use of binary logic in such a way that “0” represents the voltage level
normally associated with logic 1 (for example, 0 = +5V, 1 = 0V). Positive is
more conventional (for example, 1 = +5V, 0 = 0V).
network
A series of stations (nodes) connected by some type of communication
medium. A network may be made up of a single link or multiple links.
nominal input current
The current at nominal input voltage.