Siemens SIMATIC ET 200S Operating Instructions Manual page 156

Glossary
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 electrically isolated - for example, by means of optical isolators, relays, or
transformers. Input/output circuits can be grouped.
MAC address
Each PROFINET device has a factory-assigned worldwide unique device identification. This
6-byte device identification is the MAC address.
The MAC address consists of:
● 3-byte manufacturer ID and
● 3-byte device ID (serial number)
As a rule, the MAC address can be read on the front of the device,
for example: 08-00-06-6B-80-C0
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 → direct and → reversing starters. The startup and
direction of rotation of a motor are determined by motor starters.
Node
Device that can send, receive or amplify data via the bus,
for example,. DP master, DP slave, RS 485 repeater.
Non-isolated
In the case of non-isolated input/output modules, the reference potentials of the control and
load circuits 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 = extra low voltage with safe isolation
156
Operating Instructions, 08/2008, A5E00515771-06
ET 200S