Wiring; General Rules And Regulations For Operating An Et 200Eco Pn - Siemens SIMATIC ET 200eco PN Operating Instructions Manual

Wiring

3.1

General rules and regulations for operating an ET 200eco PN

Introduction
When operating the ET 200eco PN distributed I/O device as part of a plant or system,
special rules and regulations have to be followed depending on the field of application.
This section provides an overview of the most important rules you have to observe when
integrating the ET 200eco PN distributed I/O device in a plant or system.
EMERGENCY-STOP equipment
EMERGENCY STOP equipment according to IEC 204 (corresponds to DIN VDE 113) must
remain effective in all operating modes of the plant or system.
System startup after specific events
The table below identifies situations you must pay attention to when the system starts up
after the occurrence of certain events.
If ...
Startup follows a power dip / failure
Startup of the ET 200eco PN after bus
communication has been interrupted
Startup after releasing the EMERGENCY
OFF equipment
24 V DC supply
The table shows what you have to observe for the 24 V DC supply.
At ...
Buildings
24 VDC supply lines, signal
lines
24 V DC supply
Loop-through of supply
voltage
ET 200eco PN
Operating Instructions, 06/2009, A5E01250250-04
then ...
Dangerous operating states must be avoided at all times.
If necessary, force an "EMERGENCY OFF"!
Any uncontrolled or undefined startup must be avoided.
Requirements ...
external lightning protection
internal lightning protection
safe (electrical) isolation of the extra-low voltage
Voltage drop in the case of loop-through (see Chapter Looping
PROFINET and the supply voltage (Page 59))
take lightning protection measures
(for example, lightning protection
elements)
3
27