Glossary - Siemens 3RS2 Manual

Glossary

ECO mode
Energy-saving display mode. The display therefore goes dark after an idle time, thereby reducing
the energy consumption.
Infrared communication
Wireless communication between individual devices for data transmission using light in the
infrared waveband.
IO-Link
Point-to-point connection to conventional and intelligent sensors/actuators by unshielded
standard cables using 3-wire technology.
Open-circuit principle
The mode of operation of electrically operated functional parts, whereby the function is
guaranteed when current is flowing ("working current").
Output relay
Relay in the output (of the control circuit).
Quiescent current principle
The mode of operation of electrically operated functional parts, whereby the function is
guaranteed not by the presence of a voltage, but by the absence of current ("quiescent current
principle").
Resistance sensor
Sensor that contains a resistor for recording the measured variable.
Screw terminal
Device for the connection and/or coupling and subsequent release of one or more conductors,
the connection being established either directly or indirectly by means of any types of screw or
nut.
Screw-type connection system
Connection technology in which an electrical cable is clamped by a screw.
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002
113