E-1
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Determining the Leakage Resistance of an
ET 200S Station
Ohmic resistance
When determining the leakage resistance for an ET 200S station (for a
ground-fault detector, for example), you must take into account the ohmic
resistance from the RC combination of each module:
Module
Ohmic resistance from RC network
Interface module
10 M
Ω (−
5%)
PM-E 24 VDC power module
10 M
Ω (−
5%)
PM-E 24 VDC / 120/230 VAC power module
------
Formula
You can use the following formula to calculate the leakage resistance of an ET
200S station if you secure all the modules listed above with
one
ground-fault
detector:
R
ET 200S
=
R
Modul
N
R
module
R
IM 151
R
PM-E 24 VDC
Leakage resistance of a module
Leakage resistance of the IM1511 interface module
Leakage resistance of the PM-E 24 VDC power module
N
Number of power/interface modules in the ET 200S station
R
IM 151
=
R
PM
−
E DC24V
=
R
Modul
=
9.5 M
Ω
R
ET 200S
Leakage resistance of the ET 200S station
Figure E-1
Formula for calculating the leakage resistance of an ET 200S station
If you secure the modules listed above in an ET 200S station with a number of
ground-fault detectors, you must obtain the leakage resistance for each
ground-fault detector.
E
Содержание SIMATIC ET 200S
Страница 42: ...Product Overview 1 16 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 64: ...Brief Instructions on Commissioning ET 200S 2 22 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 112: ...Configuration Options 3 48 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 232: ...Commissioning and Diagnostics 6 72 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 244: ...General Technical Specifications 7 12 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 274: ...Interface Modules 8 30 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 538: ...4 IQ SENSE 13 18 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 564: ...Address Space of the Input and Outputs of the ET 200S C 4 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 574: ...Response Times D 10 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 580: ...Special Measures for Interference Free Operation F 4 ET 200S Distributed I O System EWA 4NEB 780602402 12 ...
Страница 600: ...Product Information on the Use of subassemblies modules in a Zone 2 Hazardous Area 2 A5E00352937 02 ...