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Notes on Using this Manual Centralized and Distributed Configuration of a Programmable Controller SIMATIC S5 Installation Guidelines Central Controllers and Expansion Units, S5-135U/155U Power Supply Units CPUs, Memory Cards, Memory System Manual Submodules, Interface Submodules Multiprocessor Operation/Coordinators Interface Modules Order No. 6ES5 998-0SH21 Release 03 Digital Input/Output Modules Analog Input/Output Modules...
Siemens. In the event of product liability damages due to the use of so-called SIMATIC-compatible mo- dules, Siemens are not liable since we took timely action in warning users of the potential ha- zards involved in so-called SIMATIC-compatible modules."...
ESD Guidelines Guidelines for Handling Electrostatically Sensitive Devices (ESD) What is ESD? VSLI chips (MOS technology) are used in practically all SIMATIC and TELEPERM modules. These VLSI components are, by their nature, very sensitive to overvoltage and thus to electrostatic discharge: They are therefore defined as Electrostatically Sensitive Devices: "ESD"...
ESD Guidelines When is a Static Charge Formed? One can never be sure that the human body or the material and tools which one is using are not electrostatically charged. Small charges up to 100 V are very common; these can, however, very quickly rise up to 35 000 V! Examples of static charge: –...
ESD Guidelines Sitting position Standing position Conductive flooring Anti-static table Anti-static shoes Anti-static coat Grounding wrist strap Grounding connection of the cabinets Standing/sitting position Measurements and Modifications to ESD Modules • Measurements on modules may only be carried out under the following conditions: –...
Contents Notes on Using this Manual ..........1 - 1 Centralized and Distributed Configuration of a Programmable Controller .
Contents Power Supplies for Programmable Controllers and I/Os ......3 - 22 3.4.1 Power Supplies for Control Systems with SIMATIC S5 .
Contents Removing the right-hand fan and connecting the rechargeable battery ..4 - 36 Fitting the filter subdrawer ..........4 - 37 Setting the voltage selector switch .
STEP 5. When you use a CPU 948, you have an S5-155U PLC. for fast word and binary signal processing and for CPU 928B communication;...
Notes on Using this Manual/Overview Given as a guide in the following are pointers on how this manual is organized; they will assist you when using your S5-135U/155U programmable controller. • • At the end of this manual you will find the "ESD Guidelines." You must observe these to the letter and follow them during the entire time you are working with the S5-135U/155U PLC.
Notes on Using this Manual/Overview To configure your PLC with expansion units (EUs) you will need the following chapters: • • Chapter 2 shows how you can configure a PLC with expansion units in a centralized or distributed arrangement. • • Described in Chapter 4, Section 4.2, are the EU 183U, EU 184U, EU 185U and EU 187U.
Centralized and Distributed Configuration of a Programmable Controller Contents of Chapter 2 Centralized and Distributed Configuration of a Programmable Controller ... 2 - 3 Application ............. 2 - 4 Centralized and Distributed Configuration .
Centralized and Distributed Configuration of a Programmable Controller This chapter contains an overview of the methods of configuring an S5-135U/155U PLC. You will find a description of the types of communication between a central controller and the expansion units, and an overview of the interface modules required for the different types of communication.
Application Application The S5-135U/155U programmable controllers comprise a central controller (CC) and, if required, one or more expansion units (EUs). You need EUs when there are insufficient slots in the CC for the modules to be used. Various interface modules (IMs) are available for communication between the CC and the EUs and between the EUs.
Centralized and Distributed Configuration Centralized and Distributed Configuration You can install a PLC in centralized or distributed configuration according to your application. IF... THEN... you wish to position the modules as closely as choose the possible to the CC and can accept longer cable runs centralized to the process, configuration...
Centralized and Distributed Configuration With the distributed configuration, a distinction is made between parallel and serial communication. The main features of these types of communication are as follows: • • Parallel fast data transmission line length of up to 600 m •...
Centralized and Distributed Configuration To install a PLC in a centralized configuration, you must observe the following conditions: • • A centralized configuration is generally only suitable for connecting I/O modules (DI, DQ, AI, AQ) and some intelligent I/O modules (IPs) in the EU (see the Configuring Aids in the catalog and Chapter 4).
Centralized and Distributed Configuration • • With the IM 301/IM 310 pair of interface modules, you can only use I/O modules (DI, DQ, AI, AQ) and IPs without page addressing in the EUs. • • With the IM 304/314 pair of interface modules, you can use all IPs, CPs and I/O modules in the EU 185U.
Examples Examples Given in the following are some examples of centralized and distributed configuration of various SIMATIC S5 components. 3 EUs max. EU 184U IM 312-5 4 EUs max. EU 183U EU 184U IM 312-3 IM 312-5 6ES5 760-0AB11 EU 183U EU 184U IM 312-5 IM 312-3...
Examples 6ES5 721-0xxx0 EU 185U EU 185U 4 EUs max. IM 314 IM 314 6ES5 760-1AA11 IM 304 600 m max. CC S5-135U/155U EU 185U EU 185U 4 EUs max. IM 314 IM 314 6ES5 721-0xxx0 6ES5 760-1AA11 Figure 2-4 Distributed Configuration of an S5-135U/155U with the IM 304 and IM 314 6ES5 760-0AB11 IM 312-3...
Installation Guidelines The Installation Guidelines provide you with information for the interference-free installation of the SIMATIC S5-135U/155U programmable controllers. This chapters describes the following: • • Paths which serve for interference pickup in programmable controllers, and five rules for ensuring electromagnetic compatibility (EMC) •...
Principles of Installation of Systems for EMC Principles of Installation of Systems for EMC What does EMC mean? Electromagnetic compatibility (EMC) is understood to mean the capability of electrical equipment to operate correctly in a defined electromagnetic environment, without being affected by the environment and without affecting the environment to an unacceptable degree.
Principles of Installation of Systems for EMC Depending on the propagation medium (conducted or non-conducted interference) and distance from the source, interference can be picked up by the programmable controller via different coupling mechanisms. A distinction is made between the following: •...
Principles of Installation of Systems for EMC Coupling mechanisms and Shown in the following table are the four different coupling typical interference sources at mechanisms, their causes and possible interference sources. a glance Coupling Mechanism Cause Typical Interference Sources • • •...
Principles of Installation of Systems for EMC 3.1.2 The Most Important Basic It is often sufficient to comply with a few elementary rules for Rules for Ensuring EMC ensuring EMC. When installing the control system, therefore, observe the following five basic rules. When installing the programmable controllers, provide large-area good quality grounding of the inactive metal parts (see Section 3.2).
Principles of Installation of Systems for EMC • • Provide the line shields with a large-area connection to a shield/protective conductor bar immediately after the cabinet inlet, and secure the shields with cable clamps. Route the grounded shield as far as the module without interruption, but do not connect the shield there again.
Installation of Programmable Controllers for EMC Installation of Programmable Controllers for EMC Measures for suppressing interference voltages are often applied only when the control system is already operational and proper reception of a useful signal is impaired. The reason for such interference is usually inadequate reference potentials caused by mistakes in equipment assembly.
Installation of Programmable Controllers for EMC 3.2.2 Example of Cabinet The example of cabinet assembly in the figure shows the various Assembly for EMC measures, the grounding of inactive metal parts and the connection of shielded cables. This example applies only to grounded operation. Follow the points numbered in the figure during assembly.
Installation of Programmable Controllers for EMC Grounding strips If there are no large-area metal-to-metal connections, you must connect inactive metal parts such as cabinet doors and supports with grounding strips. These should be short and have a large surface. Cabinet members The cabinet members should have a large-area connection to the cabinet housing (metal-to-metal connection).
Installation of Programmable Controllers for EMC 3.2.3 Example of Rack and Wall To operate your control system in a low-interference environment Mounting for EMC whilst observing the permissible ambient conditions (see "Technical Specifications"), you can mount the programmable controllers on racks or directly on walls.
Installation of Programmable Controllers for EMC Reference Potential Surface Shielded Signal Line Cable Clamp for Shield Contact Shield/Protective Conductor Bar Connection to P. Ground: 10 mm² Figure 3-3 Wall Mounting of an S5-135U/155U PLC System Manual 3 - 13 C79000-B8576-C199-03...
Wiring of Programmable Controllers for EMC Wiring of Programmable Controllers for EMC The following section describes: • • Routing of cables within and outside cabinets • • Equipotential bonding between devices • • Single and double-ended connection of cable shields •...
Fit these protective devices at the cable entry into the building. Note Lightning protection measures always require an individual assessment of the entire installation. For clarification, please consult your Siemens regional office or a company specializing in lightning protection. Equipotential bonding Ensure adequate equipotential bonding between the connected equipment (see Section 3.3.2).
Wiring of Programmable Controllers for EMC 3.3.2 Equipotential Bonding Between separate sections of an installation, potential differences can develop if • • programmable controllers and I/O devices are connected via a non-floating link, or • • cable shields are connected at both ends and are grounded at different parts of the system.
Wiring of Programmable Controllers for EMC 3.3.3 Shielding of Cables and Shielding is a method of attenuating magnetic, electrical or electro- Lines magnetic interference fields. Interference currents on cable shields are given a path to ground via the shield bar which is electrically connected to the housing. A low-impedance connection to the protective conductor is particularly important so that these interference currents themselves do not become an interference source.
Wiring of Programmable Controllers for EMC Please observe the following points when connecting the shield: • • Use metal cable clamps for securing the braided shield. The clamps must enclose the shield over a large area and provide a good contact. •...
Wiring of Programmable Controllers for EMC 3.3.4 Special Measures for Interference-Free Operation Fitting quenching elements to As a rule, inductances such as contactor or relay coils controlled by inductances SIMATIC S5 do not require external quenching elements in the circuit, because the quenching elements are already integrated in the modules.
Wiring of Programmable Controllers for EMC AC power connection for A power socket should be fitted in each cabinet for the AC supply to programmers programmers. The sockets should be powered from the distribution system to which the protective conductor for the cabinet is also connected.
Wiring of Programmable Controllers for EMC 3.3.5 Checklist for the Electromagnetically Compatible Installation of Control Systems EMC Measures Notes Connection of inactive parts (Section 3.2) Check, in particular, the connections on: • Subracks • Cabinet members • Shield and protective conductor bars Do all inactive metal parts have a large-area, low-impedance interconnection and ground? Is there a satisfactory connection to the ground/protective conductor...
Power Supplies for Programmable Controllers and I/Os Power Supplies for Programmable Controllers and I/Os This section describes: • • Which circuits you must distinguish in the control system and which demands are made on the power supply. • • Connection and grounding concept with higher-level infeed from grounded, centrally grounded and ungrounded supplies.
Power Supplies for Programmable Controllers and I/Os In the event of short-circuits at digital outputs, if the load power supply is not adequately rated, a current which is higher than the rated current can flow for a longer period without responding of the electronic short-circuit protection of the DQ module.
Power Supplies for Programmable Controllers and I/Os • • For 24 V DC load circuits, you require a load power supply unit Load power supply with safety separation. If an AC plug is used as the isolating device, the socket must be in the vicinity of the CC and easily accessible (VDE 0805, 1.7.2).
Power Supplies for Programmable Controllers and I/Os Operating a programmable Operation from grounded power supplies offers the best rejection of controller with process I/Os interference. from a grounded supply Low-Voltage Distribution, e.g. TN-S System Cabinet Programmable Controller Control Power Supply L+/L1 L-/N Non-Float-...
Power Supplies for Programmable Controllers and I/Os Operating a programmable In systems with their own transformers or generators, the PLC is controller with process I/Os connected to the central ground. A detachable connection should be from a centrally grounded provided so that ground faults can be measured. supply The PLC should be insulated from cabinet/protective conductor potential.
Power Supplies for Programmable Controllers and I/Os Operating a programmable In cases in which the higher-level power supply is not grounded, you must connect the programmable controller to a separate protective controller with process I/Os conductor/ground (e.g. foundation ground). Operation of the PLC with from an ungrounded supply non-floating power supplies is not allowed.
Power Supplies for Programmable Controllers and I/Os 3.4.3 Connecting Non-Floating or Shown in the following sections are the specical features when Floating Modules installing non-floating and floating modules. Installation with In an installation with non-floating modules, the reference potentials non-floating modules of the control circuit (0 V ) and load circuits (0 V ) are electrically...
Power Supplies for Programmable Controllers and I/Os Note For 24 V DC digital output modules with electronic short-circuit protection, you must ensure that the reference potential of the load power supply is connected to terminal L- of the module. If this connection is missing (e.g.
Interference-Free Installation of Centralized and Distributed Interface Circuits Interference-Free Installation of Centralized and Distributed Interface Circuits Subjects described in the following sections are the shielding and grounding concept with centralized and distributed interface circuits. Information on component selection, the mechanical arrangement and wiring can be found in the appropriate reference manuals for the interface modules.
Interference-Free Installation of Centralized and Distributed Interface Circuits With distributed interfacing (IM 304/IM 314 and IM 301/IM 310), ensure that the VDE specifications for laying the protective ground are complied with; distributed interfacing is non-floating. The measures described above are shown in the following figure. If the permissible potential difference between ground points can be exceeded, you must install an equipotential bonding conductor (cross-section ≥...
Interference-Free Connection of Monitors Interference-Free Connection of Monitors These sections cover the following topics: • • Floating connection of cables at video inputs • • Shielding and grounding concept Information on selecting the components can be found in Catalog ST80. 3.6.1 Interference-Free Operator control and process monitoring systems from the COROS...
Interference-Free Connection of Monitors In these cases, double-shielded coaxial cables (triaxial cables) must be used to transmit the video signals. The inner braided shield of the coaxial cable serves as the return conductor and must not be connected to the shield bar. The outer braided shield provides a path to ground for interference currents and must be incorporated in the shielding and grounding measures.
Interference-Free Connection of Monitors Shown in the following figure is a simplified representation of the shielding and grounding measures for installing the monitor and PLC. Figure 3-14 Shielding and Grounding for a Distributed Arrangement of Monitor and PLC System Manual 3 - 34 C79000-B8576-C199-03...
Selection and Installation of Cabinets with SIMATIC S5 Selection and Installation of Cabinets with SIMATIC S5 The following criteria must be observed when selecting and dimensioning a cabinet: • • Ambient conditions at the point of installation of the cabinet •...
Selection and Installation of Cabinets with SIMATIC S5 3.7.1 Types of Cabinet The following table provides on overview of the most common types of cabinet. It also shows the principle of heat removal, as well as the estimated, maximum achievable power loss removal and the type of protection* .