Siemens ST PCS 7 User Manual
Process I/O
ET 200M distributed I/O
Introduction
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Siemens ST PCS 7 · November 2007
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Overview
Within the ET 200 range, ET 200M represents the main series
of distributed I/O systems for process control applications with
SIMATIC PCS 7.
The ET 200M has a versatile range of I/O modules of S7-300 de-
The ET 200M has a versatile range of I/O modules of S7-300 de-
sign, including ones with special I&C functions.
• Standard analog and digital modules
• Redundant I/O modules (DI 16 x DC 24 V, with diagnostics
• Standard analog and digital modules
• Redundant I/O modules (DI 16 x DC 24 V, with diagnostics
capability; DO 32 x DC 24 V/0.5 A; AI 8 x 12 bit)
• I/O modules with enhanced diagnostics capability
• Ex I/O modules
• Controller and counter modules
• HART modules
• F-modules for safety-related applications
When using active bus modules, faulty I/O modules can be re-
• Ex I/O modules
• Controller and counter modules
• HART modules
• F-modules for safety-related applications
When using active bus modules, faulty I/O modules can be re-
placed while the plant is in operation (RUN) without influencing
adjacent modules (hot swapping function).
The following actions are possible with the automation system in
The following actions are possible with the automation system in
RUN:
• Addition of new modules within a station
• Reparameterization of modules
• Addition of ET 200M stations
The connected HART field devices can be parameterized using
• Addition of new modules within a station
• Reparameterization of modules
• Addition of ET 200M stations
The connected HART field devices can be parameterized using
SIMATIC PDM.
Note:
Apart from these selected modules it is also possible to use - with limita-
tions in functions - all other I/O modules from the current range of S7-300
signal modules.
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Design
An ET 200M remote I/O station comprises:
• 1 or 2 (redundant) power supply modules (can be omitted in
• 1 or 2 (redundant) power supply modules (can be omitted in
the case of a central 24 V DC supply for the plant)
• 1 or 2 (redundant) IM 153 interface modules for connection via
PROFIBUS DP with transmission rates of up to 12 Mbit/s
• Up to 12 I/O modules for connection of sensors/actuators
All I/O modules have optical electrical isolation from the back-
All I/O modules have optical electrical isolation from the back-
plane bus. Up to 12 I/O modules can be connected to an
IM 153-2 High Feature interface module, or up to 8 to an IM 153-
2 FO High Feature interface module. The interface modules can
also have a redundant design if required.
In addition to the standard SIMATIC S7 I/O modules, special
I/O modules with diagnostics capability offer the following func-
tions, among others:
• Channel-based diagnostics, e.g. open-circuit, short-circuit,
• Channel-based diagnostics, e.g. open-circuit, short-circuit,
limit violations
• Internal module monitoring, e.g. parameterization error, RAM
error, tripped fuse
• Flatter monitoring for sensors
• Pulse stretching
• Output of a selectable substitute value on failure of the central
• Pulse stretching
• Output of a selectable substitute value on failure of the central
processing unit
In the event of a fault, the modules with diagnostics capability
automatically pass on the corresponding message to the opera-
tor station, permitting fast and simple troubleshooting.
The ET 200M can be used in standard environments and also in
The ET 200M can be used in standard environments and also in
Ex zones 2 and 22. The actuators/sensors can be positioned in
Ex zones 1 and 21 when suitable Ex input/output modules are
used. Hot swapping of I/O modules within Ex zone 2 and 22 is
allowed with the right permit (e.g. fire certificate).
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Technical specifications
You can find detailed technical data on the ET 200M and S7-300
I/O modules
• in Catalog ST 70 or
• in the Mall / Catalog CA 01 under "Industrial automation sys-
• in Catalog ST 70 or
• in the Mall / Catalog CA 01 under "Industrial automation sys-
tems / Controllers / SIMATIC S7"
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Options
SIPLUS extreme range for extended temperature ranges and
corrosive environments
corrosive environments
The "standard" properties of an individual device or system are
often insufficient for harsh environmental conditions, applica-
tions in corrosive environments or extreme temperature ranges.
Depending on the location of use, the result could be limitations
in functionality or operational safety or even total failure of the
plant.
The SIPLUS extreme range offers individually adapted standard
The SIPLUS extreme range offers individually adapted standard
products which permit retention of the functionality of your plant
or process even under extreme conditions of use. These in-
clude:
• Ambient temperature range from -25 to +60/+70 °C
• Condensation, high humidity
• Increased mechanical stress
• Extreme loading by media, e.g. toxic atmospheres
• Voltage ranges deviating from the standard
• Increased degree of protection (dust, water)
You can find a summary of the available range of products clas-
• Ambient temperature range from -25 to +60/+70 °C
• Condensation, high humidity
• Increased mechanical stress
• Extreme loading by media, e.g. toxic atmospheres
• Voltage ranges deviating from the standard
• Increased degree of protection (dust, water)
You can find a summary of the available range of products clas-
sified according to their special properties on the Internet. The
corresponding SIPLUS product is assigned there to the stan-
dard product. Note: SIPLUS products are also included in the
Catalog ST 70.
Additional information is available in the Internet under:
Additional information is available in the Internet under:
http://www.siemens.com/siplus
© Siemens AG 2007