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PROFIBUS PA does supply power for intrinsic SAFE DEVICES connected with TWISTED PAIR. This is DONE according to IEC 1158-2 specification (maximum current is 120 mA per coupler for intrinsic safe operation and >300mA for non intrinsic safe operation).

PROFIBUS PA does supply power for intrinsic safe devices connected with twisted pair. This is done according to IEC 1158-2 specification (maximum current is 120 mA per coupler for intrinsic safe operation and >300mA for non intrinsic safe operation).

There is no specialized bus power SUPPLY. The terminal resistors with pull-up and PULLDOWN are located at the end of the LINE and powered be the DEVICES on that place. One combination is enough to run the SYSTEM.

There is no specialized bus power supply. The terminal resistors with pull-up and pulldown are located at the end of the line and powered be the devices on that place. One combination is enough to run the system.

PROFIBUS ALLOWS between 0 and 244 byte, determined by the device requirements for INPUT and output each.

PROFIBUS allows between 0 and 244 byte, determined by the device requirements for input and output each.

• Copper cable (shielded TWISTED pair- known as IBM type 1 cable)
• Solid and STRANDED cable
• Specialized materials for plastic surrounding
• FIBER optic
• In GLASS
• In plastic
• Infrared

The base technology is a line which allows connection and removal of NODES at any TIME without breakdown.

PROFIBUS allows ring and star TOPOLOGY as well with fiber OPTICS.

The base technology is a line which allows connection and removal of nodes at any time without breakdown.

PROFIBUS allows ring and star topology as well with fiber optics.

PROFIBUS allows up to 32 NODES PER segment and up to 126 nodes for ONE NETWORK.

PROFIBUS allows up to 32 nodes per segment and up to 126 nodes for one network.

S7 is a messaging allowing communicating with all SIMATIC S7 PLC. This messaging is offered on TCP/IP and PROFIBUS. The molex product supports this messaging on several products (Ethernet, Profibus). Through Profibus S7, several distinct MEMORY AREA are accessible (write or read) MEMENTO, DB, TIMER, COUNTER,… Different kinds of connections are possible: CPU socket via MPI and S7 COMMUNICATION COUPLER via Profibus S7. The range of SIEMENS PLC supporting this protocol is wide. This messaging is based on the Client/Serveur model. A Server can accept several connections. The applicom Products SUPPORT all S7 equipments (S7-200, S7-300, S7-400 and S7-1200).

The messaging S5 is similar to S7 messaging but dedicated to SIMATIC S5 PLC.

S7 is a messaging allowing communicating with all SIMATIC S7 PLC. This messaging is offered on TCP/IP and PROFIBUS. The molex product supports this messaging on several products (Ethernet, Profibus). Through Profibus S7, several distinct memory area are accessible (write or read) MEMENTO, DB, TIMER, COUNTER,… Different kinds of connections are possible: CPU socket via MPI and S7 COMMUNICATION COUPLER via Profibus S7. The range of SIEMENS PLC supporting this protocol is wide. This messaging is based on the Client/Serveur model. A Server can accept several connections. The applicom Products support all S7 equipments (S7-200, S7-300, S7-400 and S7-1200).

The messaging S5 is similar to S7 messaging but dedicated to SIMATIC S5 PLC.

The set slave address COMMAND provides a MECHANISM to set a Profibus station address to a slave. This feature can be used to REPLACE a slave by another without manual CONFIGURATION. This address can be stored in permanent mode or volatile mode by the slave.

The set slave address command provides a mechanism to set a Profibus station address to a slave. This feature can be used to replace a slave by another without manual configuration. This address can be stored in permanent mode or volatile mode by the slave.

The freeze command is used to freeze the slave inputs; the SYNC command is used to synchronize the slave outputs. The group must be defined during the configuration. This feature USES a broadcast telegram (global control). The slave diag command can be used to know if the freeze or sync MODES are ENABLED or not.

The freeze command is used to freeze the slave inputs; the sync command is used to synchronize the slave outputs. The group must be defined during the configuration. This feature uses a broadcast telegram (global control). The slave diag command can be used to know if the freeze or sync modes are enabled or not.

Several profiles are AVAILABLE for Profibus DP (profisafe, profidrive). This PROFILE defines the MEMORY mapping of each record memory. A profile defines a common interface that ALLOWS changing a device compliant to a profile by a device from a COMPETITOR supporting the same profile, with no change required on the PLC program.

Several profiles are available for Profibus DP (profisafe, profidrive). This profile defines the memory mapping of each record memory. A profile defines a common interface that allows changing a device compliant to a profile by a device from a competitor supporting the same profile, with no change required on the PLC program.

FDT/DTM standardizes the communication and configuration interface between all field devices and host systems. Any devices can be configured, operated, and maintained through this standardized user interface regardless of supplier, type or communication protocol. The FDT/DTM describes interface that standardized data exchange between devices and control system or ENGINEERING or asset management TOOLS.

Elements in FDT/DTM architecture are:

• FDT Frame: This element is a container that allows embedding DTMS. FDT Frame offer services LIKE user management, project management and services that allow communication between DTMs.
• DTMs: DTMs are classified into two categories:

1. Comm. DTMs: Represents communication components like PC communication cards, couplers, gateways, remote I/Os, and linking devices.
2. Device DTMs which connect to the field device configuration components (e.g: Profibus: DP, DPV1, PA device). DTM is provided by the device manufacturer and represents the WHOLE logic and parameters of a device.

FDT/DTM standardizes the communication and configuration interface between all field devices and host systems. Any devices can be configured, operated, and maintained through this standardized user interface regardless of supplier, type or communication protocol. The FDT/DTM describes interface that standardized data exchange between devices and control system or engineering or asset management tools.

Elements in FDT/DTM architecture are:

With PROFIBUS DPV0 and DPV1, TWO communications types are available:

• CLASS1 is defined when the device belongs to a master (connection established/ cyclic IO data exchanged).
• Class2 is USED to communicate with a device without establishing an IO connection. In case of DPV1, since there is no established connection, a specific connection (initiate request) is established.

With Profibus DPV0 and DPV1, two communications types are available:

Profibus DPV1 is USED to read or write some record memory bloc (via slot, index). Several profiles NORMALIZED these records (AREA memory). DPV1 is BASED on two modes: Class 1 and Class2. DPV1 is based on top of DPV0.

Profibus DPV1 is used to read or write some record memory bloc (via slot, index). Several profiles normalized these records (area memory). DPV1 is based on two modes: Class 1 and Class2. DPV1 is based on top of DPV0.

PROFIBUS DP (Decentralized Peripherals) is used to operate sensors, actuators and input/ output deported via a centralized CONTROLLER. On a PROFIBUS DP network, 126 equipments could be connected. Each equipment could support up to 244 input/outputs. PROFIBUS DP is a fast PROTOCOL. The communication can be established up to 12M Bauds. PROFIBUS DP is deterministic due to its TIMING configuration (cyclic communication). Acyclic requests are ALSO POSSIBLE.

PROFIBUS DP (Decentralized Peripherals) is used to operate sensors, actuators and input/ output deported via a centralized controller. On a PROFIBUS DP network, 126 equipments could be connected. Each equipment could support up to 244 input/outputs. PROFIBUS DP is a fast protocol. The communication can be established up to 12M Bauds. PROFIBUS DP is deterministic due to its timing configuration (cyclic communication). Acyclic requests are also possible.

Profibus is a building automation communications STANDARD which defines application LAYER data and physical CONNECTIONS.

PROFIBUS (Process Fieldbus) Is An INDUSTRIAL control NETWORK used for factory automation, process control, motion control and safety networks. Using master/slave architecture, specialized “Profiles” are used to support each of these areas.

Several messaging could be added over PROFIBUS:

• Profibus DP
• Profibus S7
• Profibus S5
• Profibus MPI

Profibus is a building automation communications standard which defines application layer data and physical connections.

PROFIBUS (Process Fieldbus) Is An industrial control network used for factory automation, process control, motion control and safety networks. Using master/slave architecture, specialized “Profiles” are used to support each of these areas.

Several messaging could be added over PROFIBUS:

The PROFIBUS standard defines two variations of the bus CABLE. However it is RECOMMENDED to use cable Type A in all new installations.

Type A is recommended for high transmission speeds and permits a doubling of the network distance in comparison to Type B.

Type A Technical specification:

• Impedance: 35 up to 165 Ohm at frequencies from 3 to 20 MHZ.
• Cable capacity: < 30 pF PER meter.
• Core diameter: > 0,34 mm², corresponds to AWG 22.
• Cable type: twisted pair cable. 1×2 or 2×2 or 1×4 lines.
• Resistance: < 110 Ohm per km.
• Signal attenuation: MAX. 9 dB over total length of line section.
• Shielding: CU shielding braid or shielding braid and shielding foil.
• Max. Bus length: 200 m at 1500 kbit/s, up to 1,2 km at 93,75 kbit/s. Extendable by repeaters.

The PROFIBUS standard defines two variations of the bus cable. However it is recommended to use cable Type A in all new installations.

Type A is recommended for high transmission speeds and permits a doubling of the network distance in comparison to Type B.

Type A Technical specification:

PROFIBUS has already found many applications in factory, process and building automation, for example from automotive MANUFACTURE at General Motors across Europe, to Breweries like Bit burger and Guinness to building management like the Russian Kremlin building. PROFIBUS is ALSO being used in applications that were never envisaged from its conception, because it has been constructed in a way that allows for many new device types to be added.

However, the two key areas of industry that can most benefit from its adoption are:

• Factory Automation, where signal wiring costs are cut significantly and many devices can be installed directly on the bus, thus removing the need for many input and OUTPUT signals.
• Process Automation, where cabling costs are significantly reduced; devices can be placed directly in the hazardous areas; many analogue I/O cards can be eliminated by transferring all data on one twisted PAIR cable. This also REDUCES the need for I/S barriers.

PROFIBUS has already found many applications in factory, process and building automation, for example from automotive manufacture at General Motors across Europe, to Breweries like Bit burger and Guinness to building management like the Russian Kremlin building. PROFIBUS is also being used in applications that were never envisaged from its conception, because it has been constructed in a way that allows for many new device types to be added.

However, the two key areas of industry that can most benefit from its adoption are:

The PROFIBUS Standard does not SPECIFY an alternative to the 9 pin D-SUB connectors, but it is often necessary to have ALTERNATIVES AVAILABLE.

The test specification for DP Slaves defines:

• Alternative connectors may be used. No special CONNECTOR is defined. But if the device with these alternative connectors should be certified, it must have all the mandatory signals of the PROFIBUS D-SUB connector available.
• Furthermore, you should take into consideration for high speed usage, that some additional components should be used in combination with the D-SUB connector, or any other one.
• These components (R, L, C) are specified into the Implementation Guideline for PROFIBUS-DP, and are explained in detail including sample circuit diagrams in the new PROFIBUS-DP BOOK (The Rapid Way to PROFIBUS-DP). This book may be ordered from your local PROFIBUS organization.

The PROFIBUS Standard does not specify an alternative to the 9 pin D-SUB connectors, but it is often necessary to have alternatives available.

The test specification for DP Slaves defines:

In addition to a PLC and the devices to be controlled:

• A cable – Shielded Twisted Pair with terminating resistors or Fibre Optic with Optical Link Modules.
• A GSD file for each device. (A simple ASCII text file containing device data like identification info, what transmission speeds are supported, data format, TIME required to respond etc.).
• A software configuration tool. This configures the ACTIVE stations and tells them what devices are present on the BUS and how much data it needs to exchange with them etc. is required.

In addition to a PLC and the devices to be controlled:

PROFIBUS GUARANTEES backwards compatibility. So, if new functions are offered in a device it will still be possible to use this device on the same wire with older devices, allowing progression of the SYSTEM without forcing users to upgrade unless they specifically WISH to enhance their FUNCTIONALITY.

PROFIBUS guarantees backwards compatibility. So, if new functions are offered in a device it will still be possible to use this device on the same wire with older devices, allowing progression of the system without forcing users to upgrade unless they specifically wish to enhance their functionality.

PROFIBUS has been designed to allow configurations where redundant cabling is possible to take account of wire breaks. Also, NODE FAILURES can be configured to be ignored, or to trigger a ‘stop’ in the master. In this case unaffected nodes can continue operation. When a failure is identified the master immediately resends the telegram and it’s possible to configure the number of TIMES this is attempted. Information relating to the failure is generally AVAILABLE on a node, a module within a node and on a channel specific basis. Certification testing of devices through an authorized test laboratory ensures that potential failures conform to what is expected of them. Media redundancy can be achieved through dual master systems.

PROFIBUS has been designed to allow configurations where redundant cabling is possible to take account of wire breaks. Also, node failures can be configured to be ignored, or to trigger a ‘stop’ in the master. In this case unaffected nodes can continue operation. When a failure is identified the master immediately resends the telegram and it’s possible to configure the number of times this is attempted. Information relating to the failure is generally available on a node, a module within a node and on a channel specific basis. Certification testing of devices through an authorized test laboratory ensures that potential failures conform to what is expected of them. Media redundancy can be achieved through dual master systems.

The base of the specification of the PROFIBUS standard was a RESEARCH project that took place between 1987-1990, supported by the following companies: ABB, Phoenix Contact, AEG, Rheinmetall, Bosch, RMP, HONEYWELL, Sauter-Cumulus, Kloeckner-Moeller, Schleicher, Landis & Gyr, and Siemens.

• FIVE GERMAN research institutes also supported the project: FZI Karlsruhe, LRT, IITB, WZL, and LPR
• There was also minor sponsorship from the German government.
• The result of the project was the first draft of DIN 19245, the PROFIBUS standard.

The base of the specification of the PROFIBUS standard was a research project that took place between 1987-1990, supported by the following companies: ABB, Phoenix Contact, AEG, Rheinmetall, Bosch, RMP, Honeywell, Sauter-Cumulus, Kloeckner-Moeller, Schleicher, Landis & Gyr, and Siemens.

A GSD file is used to identify the basic operational characteristics of a PROFIBUS DEVICE, to aid interoperability and interchangeability. It makes it possible to have manufacturer-independent configuration tools. Typically, a GSD file includes VENDOR information, baudrates, timing information, the options or features supported and the available I/O signals. A GSD file must be available for every PROFIBUS SLAVE.

A GSD file is used to identify the basic operational characteristics of a PROFIBUS device, to aid interoperability and interchangeability. It makes it possible to have manufacturer-independent configuration tools. Typically, a GSD file includes vendor information, baudrates, timing information, the options or features supported and the available I/O signals. A GSD file must be available for every PROFIBUS slave.

Not generally but PROFIBUS CONNECTIVITY should not add significantly to standard field device costs as most devices today are digitally based anyway. It’s more instructive to look at wider issues. Having a single CABLE to connect devices means big savings in design, engineering and installation costs. Furthermore, the availability of data across the plant means even more savings are POSSIBLE over the lifetime of a device through BETTER operations and improved asset management. Better data FLOWS lead to better plant management too. Overall, any extra cost per device is insignificant compared with the life cycle savings of a fieldbus network.

Not generally but PROFIBUS connectivity should not add significantly to standard field device costs as most devices today are digitally based anyway. It’s more instructive to look at wider issues. Having a single cable to connect devices means big savings in design, engineering and installation costs. Furthermore, the availability of data across the plant means even more savings are possible over the lifetime of a device through better operations and improved asset management. Better data flows lead to better plant management too. Overall, any extra cost per device is insignificant compared with the life cycle savings of a fieldbus network.

PROFIBUS is COMPLETELY OPEN. It was originally standardized in Germany in 1989 as DIN 19245 and in July 1996 as EN 50 170. The EN 50 170 specification is available through any of the NATIONAL standards bodies of CENELEC / IEC and the PROFIBUS Specification can be supplied by any of the Regional PROFIBUS ASSOCIATIONS. It’s now globally standardized under IEC 61158.

PROFIBUS is completely open. It was originally standardized in Germany in 1989 as DIN 19245 and in July 1996 as EN 50 170. The EN 50 170 specification is available through any of the national standards bodies of CENELEC / IEC and the PROFIBUS Specification can be supplied by any of the Regional PROFIBUS Associations. It’s now globally standardized under IEC 61158.

To ensure easy HANDLING a signal ‘ground’ wire is not USED by PROFIBUS. However, it is recommended to ISOLATE the interface circuit from the local ground (e.g. using Optocouplers) to reduce possible common mode voltages between transceivers.

To ensure easy handling a signal ‘ground’ wire is not used by PROFIBUS. However, it is recommended to isolate the interface circuit from the local ground (e.g. using Optocouplers) to reduce possible common mode voltages between transceivers.

This mode defines the status of signals in IO modules if a BUS or system failure occurs. It is common that all output signals are going to the zero VOLTAGE level in a FAILSAFE situation. The status is important in FUNCTIONAL safety applications where a profile such as PROFIsafe is USED.

This mode defines the status of signals in IO modules if a bus or system failure occurs. It is common that all output signals are going to the zero voltage level in a failsafe situation. The status is important in functional safety applications where a profile such as PROFIsafe is used.

A Class 1 master can communicate actively only with its CONFIGURED SLAVES and is able to communicate in a passive way with a Class 2 master. The class 2 master is the ‘supervisory’ device. It can communicate with Class 1 masters, their slaves and its own slaves for CONFIGURATION, diagnostic and data/parameter EXCHANGE purposes.

A Class 1 master can communicate actively only with its configured slaves and is able to communicate in a passive way with a Class 2 master. The class 2 master is the ‘supervisory’ device. It can communicate with Class 1 masters, their slaves and its own slaves for configuration, diagnostic and data/parameter exchange purposes.

This is a subjective issue but – provided that the technical solution is satisfactory for the task – it boils down to cost/benefit comparisons. PROFIBUS provides users with the best possible, future proof bus system that can cope with the broad needs of factory and process automation. Market acceptance and sheer momentum means that PROFIBUS is a de-facto fieldbus standard throughout the world.

Here are some of the facts:

• PROFIBUS has the largest portfolio of products in the fieldbus world. In 2008 it reached 2400 products and services.
• It has the largest installed BASE. At the end of 2008 the total had passed 28 MILLION and by 2012 it is expected to reach 50 million.
• It is supported by the largest user organization in this INDUSTRY. PI had over 1400 members at the end of 2008.
• There are 24 Regional PI Associations worldwide, ensuring local support in all industrialized AREAS.
• There are close to 400 vendors of PROFIBUS products and services, hence there is plenty of choice for users.
• It’s supported by manufacturers of both master and slave devices providing a truly open approach and practical vendor independence.
• Choice drives competition amongst vendors, leading to cost, supply and performance benefits for end users..
• PROFIBUS technology can be used for several LEVELS within the information flow in a company.
• Knowledge of one standard can be utilized on several levels.
• There’s wide application potential across factory, process and building automation.
• It’s a stable protocol with many chip options available today.
• It’s suitable for operation in intrinsically safe areas in process control.
• It is the only fieldbus that can be used in hybrid applications – where process and discrete automation segments co-exist in a plant.
• Platform independence means PC, PLC and DCS based controllers are available.
• 244 byte telegram means that large packets of data can be sent without segmentation.
• > 100km distance is achievable using fiber optics.

This is a subjective issue but – provided that the technical solution is satisfactory for the task – it boils down to cost/benefit comparisons. PROFIBUS provides users with the best possible, future proof bus system that can cope with the broad needs of factory and process automation. Market acceptance and sheer momentum means that PROFIBUS is a de-facto fieldbus standard throughout the world.

Here are some of the facts:

Profiles are definitions of non-mandatory services and parameters for specific AREAS of applications. It helps to minimize the IMPLEMENTATION EFFORTS to implement PROFIBUS functionality in appropriate FIELD DEVICES.

Profiles are definitions of non-mandatory services and parameters for specific areas of applications. It helps to minimize the implementation efforts to implement PROFIBUS functionality in appropriate field devices.

Termination of the bus prevents signal reflections on the PROFIBUS cable. WRONG or missing termination RESULTS in transmission errors when the WORST case result is that the communication link is lost. In addition, the PROFIBUS termination provides a DEFINED ‘idle’ LEVEL for the cable.

Termination of the bus prevents signal reflections on the PROFIBUS cable. Wrong or missing termination results in transmission errors when the worst case result is that the communication link is lost. In addition, the PROFIBUS termination provides a defined ‘idle’ level for the cable.

The hamming distance is a measure for how secure a protocol is against misinterpretation of a packet.. HD=4 tells us that at least 4 bits have to be WRONG, YET still match the checksum calculations, in order for it to be mistaken as a valid packet.

The hamming distance is a measure for how secure a protocol is against misinterpretation of a packet.. HD=4 tells us that at least 4 bits have to be wrong, yet still match the checksum calculations, in order for it to be mistaken as a valid packet.

Profibus or process FIELD bus is digital industrial communication system that use physical mediums such as optical fiber or copper cable for DATA exchange. Profibus is classified into the following categories.

1. Profibus FMS
2. Profibus DP
3. Profibus PA
4. Profi-Drive
5. Profi-Safe

1. Profibus FMS (field messaging system) is an obsolete now. Honestly i don’t know much about it.

2. Profibus DP (Decentralized Peripheral) is used for INTERFACING PLC, Remote IO Systems, Variable Frequency Drives, and HMI’s, Encoders, Sensors, Actuators and other similar devices. It uses RS 485 technology. As of now DP V-2 is the latest version.

3. Profibus PA (Process Automation) is used for interfacing field measuring devices such as flow transmitters, pressure transmitters etc. It uses Manchester Coding technology.

4. Profi-Drive is used for motion control applications (Controlling of Servo motors in POSITION control mode).

5. Profi-Safe is used for Fail Safe applications.

Profibus or process field bus is digital industrial communication system that use physical mediums such as optical fiber or copper cable for data exchange. Profibus is classified into the following categories.

1. Profibus FMS (field messaging system) is an obsolete now. Honestly i don’t know much about it.

2. Profibus DP (Decentralized Peripheral) is used for interfacing PLC, Remote IO Systems, Variable Frequency Drives, and HMI’s, Encoders, Sensors, Actuators and other similar devices. It uses RS 485 technology. As of now DP V-2 is the latest version.

3. Profibus PA (Process Automation) is used for interfacing field measuring devices such as flow transmitters, pressure transmitters etc. It uses Manchester Coding technology.

4. Profi-Drive is used for motion control applications (Controlling of Servo motors in position control mode).

5. Profi-Safe is used for Fail Safe applications.

PROFIBUS-PA is a ‘profile’ of PROFIBUS designed specifically for use in process automation for connecting control systems with field instruments. PROFIBUS-PA is based on PROFIBUS-DP and, using a linking device called a SEGMENT coupler, permits TRANSPARENT communication between general purpose automation and process automation networks, making PROFIBUS ideal for hybrid applications where FACTORY and process devices intermingle. The PROFIBUS PA profile defines the behavior of the field devices and ensures full interoperability and interchangeability between different manufacturers. PROFIBUS PA operates EITHER with Intrinsically Safe transmission technology (acc. to IEC 61158-2) or standard transmission technology (acc. to RS485). In summary, PROFIBUS PA fulfils the special requirements of all sectors of the process industry as FOLLOWS:

• Transparent communication between process automation networks and general purpose automation networks is possible.
• PROFIBUS PA permits powering of the field instruments and data transmission over the same two wires.
• PROFIBUS PA can be used in potentially explosive atmospheres using Intrinsically Safe transmission technology according to IEC 61158-2.

PROFIBUS-PA is a ‘profile’ of PROFIBUS designed specifically for use in process automation for connecting control systems with field instruments. PROFIBUS-PA is based on PROFIBUS-DP and, using a linking device called a segment coupler, permits transparent communication between general purpose automation and process automation networks, making PROFIBUS ideal for hybrid applications where factory and process devices intermingle. The PROFIBUS PA profile defines the behavior of the field devices and ensures full interoperability and interchangeability between different manufacturers. PROFIBUS PA operates either with Intrinsically Safe transmission technology (acc. to IEC 61158-2) or standard transmission technology (acc. to RS485). In summary, PROFIBUS PA fulfils the special requirements of all sectors of the process industry as follows:

Every DP/PA device type has to have an individual indent Number. This number is NECESSARY so that a DP-master is able to identify the types of the connected DP/PA devices without a significant protocol overhead. The master compares the indent Number of each connected device with the indent Number in the configuration database. User data transfer in the OPERATION phase is only possible when the right DP Slave is connected to the correct address. This ensures very high protection against parameterization faults. The vendors must APPLY to the PROFIBUS Support Center for an individual indent Number for every DP/PA device type.

Every DP/PA device type has to have an individual indent Number. This number is necessary so that a DP-master is able to identify the types of the connected DP/PA devices without a significant protocol overhead. The master compares the indent Number of each connected device with the indent Number in the configuration database. User data transfer in the operation phase is only possible when the right DP Slave is connected to the correct address. This ensures very high protection against parameterization faults. The vendors must apply to the PROFIBUS Support Center for an individual indent Number for every DP/PA device type.

This is the PERFORMANCE OPTIMIZED version of PROFIBUS, specifically dedicated to time-critical communication between automation systems and distributed peripherals. It is suitable as a replacement for the costly parallel wiring of 24 V and 4(0) to 20 mA measurement signals. PROFIBUS-DP is INCLUDED into the European Fieldbus Standard EN 50170.

This is the performance optimized version of PROFIBUS, specifically dedicated to time-critical communication between automation systems and distributed peripherals. It is suitable as a replacement for the costly parallel wiring of 24 V and 4(0) to 20 mA measurement signals. PROFIBUS-DP is included into the European Fieldbus Standard EN 50170.

It is recommended to connect the SHIELD on both ends LOW inductively to ‘ground’ in order to achieve optimal electromagnetic compatibility. In the case of separate POTENTIALS (e.g. in a refinery) the shield should be connected only on one end of the cable to ‘ground’. Preferably, the connection between shield and protective ground should be made via the metal cases and the screw top of a D-sub connector. If this is not possible the connection can be made via pin 1 of the D-sub connector. It should be noticed that this is not the optimal solution. In such a case it is better to bare the cable shield at an appropriate point and to ground it with a cable as short as possible to the metallic structure of the cabinet. This can be done with a ground bus bar in front of the bus connector.

It is recommended to connect the shield on both ends low inductively to ‘ground’ in order to achieve optimal electromagnetic compatibility. In the case of separate potentials (e.g. in a refinery) the shield should be connected only on one end of the cable to ‘ground’. Preferably, the connection between shield and protective ground should be made via the metal cases and the screw top of a D-sub connector. If this is not possible the connection can be made via pin 1 of the D-sub connector. It should be noticed that this is not the optimal solution. In such a case it is better to bare the cable shield at an appropriate point and to ground it with a cable as short as possible to the metallic structure of the cabinet. This can be done with a ground bus bar in front of the bus connector.

PI was formerly known as PROFIBUS INTERNATIONAL. It is the umbrella organization responsible for the PROFIBUS PROTOCOL and its promotion and support across the world via a network of Regional PI Associations. When PROFINET, PI’s INDUSTRIAL Ethernet solution, was launched, PROFIBUS International was re-named ‘PI’ (PROFIBUS and PROFINET International).

PI was formerly known as PROFIBUS International. It is the umbrella organization responsible for the PROFIBUS protocol and its promotion and support across the world via a network of Regional PI Associations. When PROFINET, PI’s Industrial Ethernet solution, was launched, PROFIBUS International was re-named ‘PI’ (PROFIBUS and PROFINET International).