Siemens ET 200S Manual page 552

Glossary
Grouping
The opening of a new potential group by a power module. This permits the
individual grouping of the sensor and load supplies.
Hot swapping
This is the removal and insertion of modules during the operation of the ET 200S.
Isolated
In the case of isolated input/output modules, the reference potentials of the control
and load circuit are galvanically isolated – for example, by means of optical
isolators, relays, or transformers. Input/output circuits can be grouped.
Master
When it has a token, a master can send data to and request data from other nodes
(= active participants). Examples of DP masters are the CPU 315-2 DP or the
IM308-C.
Motor starter (MS)
Motor starter is the generic term for ³ direct-on-line and ³ reversing starters. The
startup and direction of rotation of a motor are determined by motor starters.
Node
A device that can send, receive, or repeat data on the bus (for example, a DP
master, DP slave, or RS 485 repeater).
Non-isolated
In the case of non-isolated input/output modules, the reference potentials of the
control and load circuit are electrically connected.
Parameter assignment
Parameter assignment is the transfer of slave parameters from the DP master to
the DP slave.
PELV
Protective Extra Low Voltage = functional extra-low voltage with safety separation
Glossary-4
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07