SIMATIC
Compact Field
Unit PA Edition
Plug-and-produce simplicity and
more flexibility through consistent
decentralization
Ready for a change in perspective at the field level?
Digitalization offers important impulses for the process
industry. You can benefit from higher flexibility with more
simple device integration at highest availability. With our
new approach to field device connection, the SIMATIC
Compact Field Unit (CFU) makes it possible to transfer your
conventional system concept into a digital plant.
What are the challenges you face today with field device
connection?
• High effort for device integration and replacement
• Time-consuming, error-susceptible wiring and
marshalling ross multiple levels, resulting in complex
hardware FAT
• Miles of copper cabling, thousands of terminal points
• High planning and documentation costs
• Variety of individual control cabinets
• Large numbers of different components and protocols
require costly spare parts inventories and training
The SIMATIC CFU has the answer to these challenges!
• Plug-and-produce simplicity
• More flexibility through consistent decentralization
The new thinking is already here
• From a centralized to a distributed I/O
approach: Achieve highest flexibility through
modularization of your plant.
• From static to freely-configurable I/O: Benefit
from highly comfortable software wiring.
• From complex to simple device integration:
The name of the game is plug-and-produce
instead of trial and error.
• From specific to standardized solutions:
Makes full cost control over the plant lifecycle
possible.
siemens.com/simatic-cfu
The new SIMATIC CFU is a real game changer in field device
SIMATIC CFU PA
connection and offers entirely new perspectives regarding
simplicity and flexibility. This compact field unit is installed
at the process level and is connected via PROFINET directly
to the process control system to form the foundation for
digitalization in the field. Utilization of digital fieldbus
communication simplifies field device interfacing considerably compared to conventional 4…20-mA technology.
This absolutely innovative realization of the implementation
of the PROFIBUS PA concept makes it possible to combine
the simplicity of a point-to-point wiring system with the
scalability of digital PROFIBUS PA fieldbus communication.
As with digital field devices, it is not necessary to know
prior to connection whether the discrete field device is a
sensor or actuator – this is automatically identified and
configured when the device is connected.
Plug-and-produce simplicity
Digitalization requires a consistent and digital communication
down to the sensors and actors. This can be built up using
the tried and tested, standard PROFIBUS PA which has been
implemented into the PA Edition of the SIMATIC CFU, thus
combining ruggedness and simplified integration with all
the advantages of the PROFINET standard based on Industrial
Ethernet. Connected devices are addressed automatically,
and device integration is simple via standardized communication profiles.
More flexibility through consistent decentralization
Thanks to the installation directly in the field, classic control
cabinets are no longer required, resulting in significant
savings for cables and number of terminations as well as
reduction of planning and documentation effort. The high
granularity (16 I/O per SIMATIC CFU) enables flexible assignment to the higher-level controllers.
Device integration and replacement has never been easier!
Previously, device integration was associated with:
• increased potential for errors
• time intense set-up
• training of personnel
We designed the SIMATIC CFU in order to make all this a
thing of the past. Convince yourself from the new rules in
the field level!
Device integration scenario
What does the integration of a conventional PROFIBUS PA
pressure transmitter into the process control system of the
future look like using a SIMATIC CFU?
After tool-free connection of the pressure transmitter using
push-in terminals, the SIMATIC CFU carries out an initialization
process whereby the field device is addressed automatically.
The SIMATIC CFU then checks whether the connected field
device supports the “pressure transmitter” communication
profile pre-defined during engineering. The communication
profiles are standardized worldwide by PROFIBUS & PROFINET
International, they are available for all PROFIBUS PA field
devices. That’s how fast and simple it is to integrate the
pressure transmitter into the process control system, ready
for use – that’s plug-and-produce!
Device replacement scenario
It’s an all-too familiar scene for plant operators: It’s Saturday
night and a field device failure brings production to a plant
shutdown. In addition to the LED diagnostics directly on the
device, detailed reports are also provided by the SIMATIC
PCS 7 Maintenance Station according to NE 107.
It’s now easy for the maintenance personnel on the scene
thanks to SIMATIC CFU and plug-and-produce: whether
latest version of device or different manufacturer – no
difference thanks to the new standard profiles! After
connecting the new device, the SIMATIC CFU carries out the
addressing and standardized integration completely
automatically. A static green LED light in the corresponding
channel and a system message signal successful completion.
The service call is over.
In order to facilitate preventive maintenance of the field
devices, the SIMATIC CFU also features predictive diagnostic
functions which continuously provide information about
the current system status.
Compared with the previous manual integration process,
the installation time is reduced from half an hour or
more to less than a minute. This is where the benefits of
integrated digitalization become especially visible.
Functionalities
The SIMATIC CFU was specifically designed to meet the
requirements of the process industry in the Internet of
Things environment:
System connection via Industrial Ethernet standard:
• Redundant PROFINET connection (S2) for the highest
availability
• Flexible connectivity options via PROFINET bus adapters
(e.g. electrical, optical or mixed)
Combination of digital fieldbus and discrete I/O:
• 8× digital fieldbus (PROFIBUS PA)
• 8x digital inputs/outputs, freely configurable
Ready for the field:
• For installation in hazardous areas up to Ex-zone 2-22
• Extended temperature range from -40 to +70 °C
Ease of use:
• Automatic addressing of PROFIBUS PA field devices
• System-supported identification and integration of
PROFIBUS PA field devices into the process control
system:
– Use of standardized PA profiles
– Commissioning, device exchange and maintenance
wizards
• Implementation of diagnostic messages according to
NAMUR recommendation NE107
• 35-mm DIN rail mounting
◾
◾
• Conformal coating
• Can be used at altitudes up to 4 000 meters
• Enhanced interference immunity according to NAMUR
recommendation NE21
• Easy, orderable standardized cabinet supports up to 96 I/O
SIMATIC CFU – Lay the cornerstone for digitalization
SIMATIC CFU PA in an aluminium housing
at the field level!
Benefits at a glance
• Plug-and-produce simplicity
– Fast and fail-safe device integration
– Simple and safe device replacement without
additional engineering effort
Device integration is easier and fail-safe.
The installation time is reduced from half an hour
or more to less than a minute.
• More flexibility through consistent decentralization
– Complete elimination of individual cabinets
– Reduction in marshalling and cabling effort
– Less planning and documentation effort
– Standardized design – no hardware FAT required
– Parallelization of work processes
– Flexible system expansion without need for
stocking of spares
– Reduced installation effort, less complexity and
lower maintenance costs
Up to 70% fewer terminations required and cabling
reduction of 30% and more!
Siemens AG
Digital Industries
Process Automation
Oestliche Rheinbrueckenstrasse 50
76187 Karlsruhe, Germany
siemens.com/simatic-cfu
Subject to change without prior notice
Article No.:
DIPA-B10084-00-7600
Printed in Germany
© Siemens 2019
The information provided in this flyer contains descriptions or characteristics of
performance which in case of actual use do not always apply as described or which
may change as a result of further development of the products. An obligation to
provide the respective characteristics shall only exist if expressly agreed in the terms
of contract. Availability and technical specifications are subject to change without
prior notice. All product designations may be trademarks or product names of
Siemens AG or supplier companies whose use by third parties for their own purposes
could violate the rights of the owners.
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