General Rules And Regulations - Siemens Metro 21 M216KA Operator's Manual

3.1

General Rules and Regulations

Introduction
Specific Ap-
plication
EMERGENCY
STOP Devices
Plant Start-up
After Certain
Events
Supply Voltage
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
As a component part of a plant or system, the ET 200L distributed I/O device
necessitates observance of special rules and regulations, depending on where
it is to be used.
This section provides an overview of the most important rules which you
have to observe for integrating the ET 200L distributed I/O device in a plant
or system.
Observe the safety and accident prevention regulations – for example, the
machine protection guidelines – for specific applications.
EMERGENCY STOP devices conforming with IEC 204 (corresponds to
DIN VDE 113) must remain effective in all the operating modes of the plant
or system.
The following table shows the points you have to take into account upon
start-up of a plant following certain events.
If ...
Start-up follows a voltage drop or failure
Start-up of the ET 200L follows an inter-
ruption of bus communications
Start-up follows unlocking of the EMER-
GENCY STOP device
ET 200L start-up occurs without the DP
master addressing the ET 200L
The following table shows you the items you have to take into account in
respect of the supply voltage.
With ...
A permanently installed plant
or system not having an all-
pole supply isolating switch
Load current power supplies,
power supply modules
All circuits of the ET 200L
distributed I/O device
Then ...
No hazardous operating states
may occur. Force an EMER-
GENCY STOP, if necessary.
There must not be an uncon-
trolled or undefined start-up.
It Is Essential That ...
A supply isolating switch or a fuse be pres-
ent in the building installation
The set rated voltage range corresponds to
the local supply voltage
The fluctuation or deviation of the supply
voltage from the rated value be within the
permitted tolerance (refer to Section 6.6)
Wiring
3-3