Siemens SENTRON 3VL System Manual page 355

Phase failure
Electrodynamic power loss on multi-phase conductors controlling AC motors.
Position signaling switch
Specifies the status of the circuit breaker tripping.
Power loss
Power dissipated as heat when operating an electrical component.
PROFIBUS
PROFIBUS (Process Field Bus) is a standard for fieldbus communication in automation
technology. PROFIBUS exists in three versions:
PROFIBUS-FMS (Fieldbus Message Specification) for networking controllers.
PROFIBUS-DP (distributed I/O) for controlling sensors and actuators via a central controller
in production engineering.
PROFIBUS-PA (Process Automation) for controlling field devices via a process control
system in process engineering.
PROFIBUS (Process Field Bus)
Standard for fieldbus communication in automation systems
RCD (residual current device)
Resistance Capacitor Wiring
Rectifier
For converting alternating current to direct current.
Relay
Electromagnetically actuated switch. The relay is activated via a galvanically isolated control
circuit and can close, open or switch one or more load current circuits. A relay has a lower
switching capacity than a contactor.
Remote control
Initiation of a switching operation through a PLC.
Reversing starter
Starting control function for the direction of rotation (CW/CCW) of motors.
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
Glossary
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