PROCESS AUTOMATION. EX-i-Interface Eurocards. Edition 2001

Transcription

1 PROCESS AUTOMATION EX-i-Interface Eurocards Edition 2001

2 Foreword Pepperl+Fuchs has been in business since In 1958 we presented a world innovation: the first proximity switch in conjunction with galvanically isolated logic controls. Pepperl+Fuchs is the largest, most experienced manufacturer of intrinsically safe interface components worldwide. No one offers a more extensive line of intrinsic safety barriers for use in hazardous processing facilities including oil, gas, chemical and petrochemical. Our products fulfill all the national, European and international (IEC) requirements and P+F has even influenced these standards through its research and development. Furthermore, Pepperl+Fuchs' production and development labs worldwide maintain a certified quality assurance system in accordance with ISO In order to guarantee a high degree of local service, the Process Automation and Factory Automation Divisions of Pepperl+Fuchs are represented by subsidiaries in almost every country throughout the world. Pepperl+Fuchs is not only a specialist in intrinsic safety; our experience and innovation extend from I.S. components to complete system solutions. This comprehensive catalog will give you an overview of out Eurocard product line and the resulting system solutions. This comprehensive catalog will give you an overview of out Eurocard product line and the resulting system solutions. Additional product catalogs and brochures in the area of process automation describe I.S. interface system components as well as field devices available from Pepperl+Fuchs. Our catalogs are also available on CD-ROM.

3 Contents Page 1 Pepperl+Fuchs CD-ROM Catalog, Ex-i Video 6 2 Use in Hazardous Areas Through Intrinsic Safety 7 3 System Description / Operating Instruction 9 4 Function Overview 16 5 Model Number Key 19 6 E-System 6.1 Transformer Isolated Amplifiers Pulse Evaluation Units Solenoid Valve Driver Modules Analog Transformer Isolated Barriers Isolated Repeaters Transformer Isolated Amplifiers Transmitter and SMART-Transmitter Repeater Units Trip Amplifiers Power Supplies Relay Modules Electronic Fuse Modules 219 4

4 Contents Page 7 Accessories International Approval Listing Glossary References Function and Model Index 236 5

5 Pepperl+Fuchs Documentation and Training 1 Pepperl + Fuchs Documentation and Training Materials CD ROM Catalog The Pepperl+Fuchs CD-ROM Catalog contains the data sheets and information for Factory Automation, Process Automation and Kolleg. A product search can be initiated either by a search tree or by model number. Data sheets for sensors are located in the Factory Automation menu; in the Process Automation menu intrinsic safety products can be accessed. The Kolleg menu accesses the instructional Seminar Program and Teachware offered by Pepperl+Fuchs. Ex-i Video Preventing Explosions with Intrinsic Safety This video provides an overview of the requirements and standards that deal with primary and secondary explosion protection as determined by test agencies throughout the world. The specifics for intrinsically safe explosion protection are addressed after a brief explanation of the protection methods specified in North American and European standards. Testing techniques and installation guidelines are demonstrated and the advantages of galvanic isolation are outlined. This 20 minute instructional film is available in standard VHS format, PAL and NTSC and is accompanied by a manual focusing on the main topics. The video is available in 8 languages (German, English, Spanish, French, Flemish, Italian, Japanese and Chinese), along with the specifications applicable to the appropriate countries. Training Package Pepperl+Fuchs offers training and extended structuring for sensors and the AS-Interface. Seminars Other seminars offered by Pepperl+Fuchs: Preventing Explosions with Intrinsic Safety Level Control Remote Process Interface Signal Conditioners for Process Automation The seminars take place periodically at Pepperl+Fuchs, The House Of Technology (e.v.) in Essen or upon customer request. You will find more information in the Literature List in Chapter 10. 6

6 Introduction to Intrinsic Safety 2 Introduction to Explosion Protection through Intrinsic Safety When introducing electrical equipment in a hazardous area, extensive regulations must be observed that are subdivided into European (EU) and national requirements. The European standards define the general specifications and the detailed guidelines for methods of protection against explosion. The national requirements primarily contain the installation criteria. Electrical instruments for explosion groups I and II, as well as the T1..T6 temperature classifications, are grouped in DIN EN (see Hazardous Sub-division, Explosion Hazards from Sparking and Hot Surfaces in the following table). DIN EN presents categories, design and test specifications and model identifications for intrinsically safe instruments. Approvals for electrical instruments that are used in explosive environments are regulated by EG-Ex-Framework Guidelines 76/117/EWG and Guideline 94/9/EG. The explosion protection method for intrinsic safety always refers to intrinsically safe circuitry that includes an intrinsically safe instrument, an appropriate electrical power source and the interface cables. In intrinsically safe circuits, an explosive environment cannot be ignited by sparking or a thermal effect when using a regulated operation and certain error conditions. In intrinsically safe circuitry for category ia, 2 errors can be calculated (see definition EN 50020), and in category ib only 1 error can be calculated for not causing an explosion. Limiting the power supply, total inductivity and total capacitance within the intrinsically safe circuitry is the basic principle for intrinsically safe explosion protection methods. The project manager or user can reference the inner limit values for intrinsically safe electrical instruments to the permissible interface values of the appropriate electrical instrument according to the following table: Intrinsically safe Proof of Intrinsic Appropriate instrument Safety Instruments + cable U i > U 0 I i > I 0 P i > P 0 L i + L c < L 0 C i + C c < C 0 These limit values are printed on the instrument or are taken from the prototype test label. The reference for the limit values corresponds to the DIN VDE 0165 requirement with regards to the proof of intrinsic safety. When establishing complex intrinsically safe circuitry with more than one appropriate electrical instrument, a calculated proof of intrinsic safety should be completed which must then be referenced back to the explosion limit curves for DIN EN 50020, or to the tables that these curves portray. In this case all active electrically operated sources are summed up in one complex source. Active refers to any power source that can provide power to the intrinsically safe circuit under normal and malfunctioning operating conditions. For the intrinsically safe connector terminals of this complex power source, the working values for: the maximum output voltage V 0 the maximum output current I 0 the maximum output power P 0 are calculated depending on the combined circuitry of the individual power sources as follows: calculating for parallel circuits; I 0 from the sum of the individual currents V 0 from the maximum value of the individual voltages The individual values are taken from the declarations of conformity. The maximum output power is calculated for power supplies with linear current-voltage-power curves with the following formula P 0 = 1/4 * V 0 *I 0 Based on the calculated maximum value, the intrinsic safety is checked using the ignition limit curve. Limitations (PTB report W39 is used for non-linear current-voltage curve for systematic power sources) and safety factors are referenced under section , 'Reference to Intrinsic Safety', of DIN VDE In addition to this proof of intrinsic safety, the immunity of the intrinsically safe circuitry must also be assured against surges from other electrical power sources. If both requirements are fulfilled, a safe power limit within the circuitry will not be exceeded, even if there is a short circuit or grounding of the circuitry (EN ). A detailed description can be found in the 'Preventing Explosions with Intrinsic Safety' manual. The national specifications mentioned in the first paragraph will be replaced in the future by the following European standards, which have been submitted as first draft standards: EN Machine Safety/ combustion and explosion protection (Zone 0; 1; 2 for gas and steam / Zone 20; 21; 22 for dust) EN specifies electrical equipment in hazardous EN areas (zone divisions) specifies electrical equipment in hazardous areas (installation specification) The following table shows important general guidelines for explosion protection as applied in the European Union and North America. 7

7 Introduction to Intrinsic Safety Division of Hazards Ignition Hazards due to Sparks European Union explosive mixture in Group I: condensation hazards in mines Group II: other areas outside of mines Grouping of ignition protection methods intrinsic safety/flame proof enclosure regarding the minimum ignition current/ limit gap according to the minimum ignition energy of representative gases: Group I Methane Group IIA Propane IIB Ethylene IIC Hydrogen, Acetylene North America Explosive mixtures of air and CLASS I: Gases and vapours CLASS II: Dusts CLASS III: Fibers or flyings Division of the Class according to ignition energy: CLASS I Group A Acetylene B Hydrogen C Ethylene D Methane CLASS II Group E Metal dusts F Coal dusts G Grain dusts CLASS III No grouping Ignition Hazards due to Hot Surfaces Division of Hazardous Areas Division into temperature classes per IEC 79-8 for maximum surface temperatures with an ambient temperature of 40 C under the following conditions: T1 450 C T2 300 C T3 200 C T4 135 C T5 100 C T6 85 C The following are subdivided at the possibility of the appearance of a dangerous explosive atmosphere: for gases, vapours, fogs: (EN ) Zone 0 constant or long term 1 occassionally 2 seldom and short term for dusts: (EN ) Zone 20 long term or frequently 21 occassionally 22 short term or accumulation of layers of dust for gases or dusts: Division 1 Division 2 Note (see IEC 79-10): constant or long-term represents > 1000 h/year, occassionally represents h/year, seldom or short-term reps. < 10h/year Gas characteristic Information regarding gas grouping by ignition energy and gas ignition temparatures as well as flashpoint are contained in Redecker, Nabert, Schön/intrinsic safety ID numbers of combustible gases and vapours NFPA 497 M CSA Nr. C22-1 Approval Sites PTB Physikalisch-Technische Bundesanstalt BVS Bergbauversuchsstrecke BASEEFA British Approvals Service for Electrical Equipment in Flammable Atmosphere UL FM CSA Underwriters Laboratories,USA Factory Mutual Research, USA Canadian Standards Association Installation Requirements DIN EN (VDE 0165 Part 1) for explosive gas environments DIN EN (VDE 0165 Part 2) for environments with flammable dust NFPA 70 National Electrical Code Art. 500 NFPA 493 Standard for Intrinsically safe operations... 8

8 System Description 3 E-System (E-card) Operating Manual This operating manual is to be used in conjunction with the corresponding data sheets. Models ED2... Ex... ED0... Ex... EGT-... EGA VDC power supply, intrinsically safe circuit No separate power supply, intrinsically safe field circuit 24 VDC power supply, intrinsically safe field circuit 24 VDC power supply, intrinsically safe field circuit Applications Used in the chemical, petrochemical and other industries involving hazardous areas with explosive atmospheres. The E-System galvanically isolates signals (e.g. 20 ma or 10 V standard signals) between the hazardous and safe areas, and supports intrinsically safe I/Os within hazardous areas. The interface module should always be installed within the safe area. As noted in the data sheets, E-cards are not intended to isolate signals from high-power applications. Installation and Operation Outside of the Hazardous Area E-cards must meet an IP20 rating, which can be attained with the BGT21/E modular racks that meet DIN 41494/ Section 5. The cards require additional protection when installed in harsh environments. The E-cards must always be installed outside the explosive environment! Only intrinsically safe circuits can be used within hazardous areas. It is important to isolate the E-card from all non-intrinsically safe circuits. Installation of intrinsically safe circuits must be performed according to applicable instructions. When connecting I/O devices to E-cards, peak values of all associated components must be within the limits of intrinsic safety. Make sure all devices in the system are listed on the EC design certificate! Most important is the observance of the therein contained "Special Requirements" Special protective measures in accordance with VDE 0170/ 171, EN and EN B must be taken during installation. A minimum distance of 50 mm must be maintained between intrinsically safe and non-intrinsically safe components. Dividing walls must be used for distances less than 50 mm, or use Pepperl+Fuchs Ex-TKS isolation chamber system.the connections z10, z12, b10, b12, d10, d12 of the female connectors may not be assigned. The E-card pins and the modular rack slots are clearly marked for mounting intrinsically safe input and output circuits. The placement of the coded pin holes are determined by the manufacturer and are illustrated in the data sheets. Maintenance The transfer characteristics of the cards are stable over long periods of time so regular servicing is unnecessary. Repairs Repairs or modifications to devices in hazardous areas are allowed only by authorized technicians. Mechanics Design Mounting Material Connection method Other Ambient Conditions Ambient temperature Storage temperature Humidity Simple Eurocards in the 100 x 160 mm (per DIN 41494) format; depending on version, using designs: Front panel 4 TE (20.32 mm) and certain functions with front panel 8 TE (40.64 mm) Front panels with 20 TE (101.6 mm) and 36 TE (182.6 mm) are available for power supply modules Single mounting Base material of the conductor plates is fiberglass resin. Contact through indirect connection with plug connector per DIN 41612, series 2, type F. The standard contacts provided with 32-pin plug connectors are z and d. The 19"-Module rack with 21 plug connections is available for installation of the cards (for further details see page 229) see data sheet -25 C C (-13 F F) max. 75 % relative humidity without condensation Galvanic isolation per DIN EN and VDE 0106 The E-System devices are designed for use in enclosed electrical operating environments to which only electricians or personnell with electronics experience have access. The units were tested for installation in contamination level 2, per EN Overvoltage category II per DIN EN applies to supply circuits and overvoltage category III per DIN EN applies to non-supply circuits. Isolation for devices with Ex-Certification EN The units were tested for use in contamination level 2, per DIN EN

9 System Description E-System (E-card) Operating Manual E-System Assembly When installing Eurocards per IEC 529, a protection class of IP 20 must be maintained. This protection class is achieved with the following assemblies: 1. Mounting of a modular rack with hole punched panels out side of the circuit environment. 2. Mounting a modular rack inside a switch cabinet. Modular Rack 19"- Modular racks per DIN Section 5 with the model number BGT21/E... are available for the installation of the Eurocards. The modular racks have a standard of 21 connection sites and are suited for installation in 19"- Roller guides or 19"-Racks with a row of mounting holes per DIN (special designs for wall mounts available upon request). Modular Rack The following wiring techniques are available: HL = Hand Soldering Technique WW = Wire Wrap Technique (1 mm x 1 mm) ST = Standard Termipoint Technique (1.6 mm x 0.8 mm) MT = Maxi Termipoint Technique (2.4 mm x 0.8 mm) CSI = Crimp-on Snap-in Technique The model key on page 301 is available for use in ordering modular racks. We will gladly try to accommadate your specific needs in respect to modular racks that are not covered in this key. For example: modular racks with mixed female connectors, with integrated terminals or shorter version modular racks. 10

10 System Description E-System (E-card) Operating Manual Isolation Chamber System Ex-TKS Separation is to be maintained and special "mechanical" protective measures are to be applied according to VDE 0170/ 171 or EN and EN with the use of electronic devices and transformer isolated amplifiers. Therefore, it is necessary to maintain distances of > 50 mm (thread dimension) or to place sufficiently sized isolation walls between intrinsically safe and non-intrinsically safe connections. Both measures are costly and require much rack space. These problems are solved through the Ex-TKS isolation chamber system cheaply, efficiently and in accordance with approvals. With these isolation chamber systems it is possible to equip all or individual connection sites in commercial 19" modular racks per DIN so that they meet the appropriate regulations. A connection site that is equipped in such a way must be PTB Nr. Ex 82/202U approved. A total approval of the card and the wired connection site must be accomplished in conjunction with the conformity certification of the transformer isolated amplifiers EG... and ED.... Front view of a connection site for Transformer Isolated Amplifiers EG-... and ED... Guide track Isolation plate Female connector without I.S. circuit Guide track Isolation plate Female connector without I.S. circuit The isolation chamber system consists of the following components: Ex/TKS-1 An Ex-equipment set for one connection site in the BGT 21/E... modular rack. The set consists of: isolation chamber with cover, locking track, screws and coding pin Ex/TKS-21 Ex-equipment set for 21 connection sites in the BGT 21/E... modular rack. Ex-TP Isolation board and guide track pair Guide track Guide track Female connector with intrinsically safe circuits Back view of a connection site for Transformer Isolated Amplifiers EG-... and ED... Lock track Optional Lock track Connector pin Optional 19" Modular Rack 19" Modular Rack 11

11 System Description E-System (E-card) Operating Manual Side View of a Connection Site for Transformer Isolated Amplifiers Locking Track Isolation Chamber Optional Connection Pin Optional 19" Modular Rack Mounting the Ex-TKS Isolation Enclosure The isolation enclosure is suited for all customary wiring methods. Modular racks with isolated enclosures are available fully assembled and on short notice from Pepperl+Fuchs. The mounting of the enclosure is very simple and can be done at any time. Advantages of the Isolation Enclosure The cover of the enclosure may be opened for test purposes with a 2-4 mm screwdriver. The entire enclosure, as well as the isolation board, may be removed similarly. No spacing units or connection sites are lost when mounting enclosures and dividing walls onto a 21 connection, modular rack with Eurocards having a front panel width of 4TE (20.32 mm) and a component height of less than 15 mm. With a component height of more than 15 mm, a space requirement of 1TE (5.08 mm) for the isolation board exists in addition to the front panel width of 4TE. In order to prevent this loss of space, one should take into account when using modular racks with mixed components (Ex / Non-Ex), that all Ex and non-ex cards may be placed in a respective grouping in the modular rack. The Eurocards between one group of cards and the next group should have a component height of less than 15 mm in order to allow for the efficient installation of the Ex-TP isolation card. The features and the connectors of Eurocards with nonintrinsic safety circuits and those with intrinsic safety circuits are identical. Ex-Eurocards must be coded in order to prevent confusing one type of card for the other and thereby not utilizing "intrinsic safety" measures when required. This is easily accomplished by dual pin encoding at the female connector (see chapter "Encoding the Eurocard"). The Ex- Eurocards are encoded at the factory. The modular racks provided by Pepperl+Fuchs are pre-coded when the card type is included in the purchase order. Eurocard Encoding The danger of mistaking one card for another during the installation or the replacement of Eurocards must be prevented. Therefore, the Eurocard plug connectors are also clearly encoded like the applicable female connectors in the modular rack. Coding holes in the plug connectors and insertable coding pins in the female connectors prevent the insertion of the card in the wrong position. The coding pins (types Panduit, Souriau, Vero) can be inserted at the prescribed sites in the available holes of the female connector with an installation tool. The arrangement of the coding holes is determined at the factory and may be found in the data sheets of the respective types. The Eurocards with intrinsically safe circuits are designed for Example: Transformer Isolated Amplifier Type EG 4... a3 / c7 a3: first coding c7: second coding 12

12 System Description E-System (E-card) Operating Manual Front View of a Female Connector a c Switch Cabinet Assembly The individual modular racks are are arranged on top of each other by means of roller guides within the switch cabinet. Jumper and terminal connectors can be installed on the back of the switch cabinet which are compatable with the system and field cables. z b d Connector per DIN Type F Side View of Female Connector Setting tool Type 2151 / Panduit 2151 / Vero / Souriau Coding pin Type TP / Panduit TP / Vero / Souriau 13

13 System Description Mechanical Dimensions The following is an overview which shows all available designs with their dimensions. Type A Type B Plug connector to DIN TE TE Type C 3HE Plug connector to DIN , TE

14 System Description Type D 112 3HE TE New Eurocard Housing New: Design Face plate optimally sectioned Labeling strip for: device specifications (functions diagrams etc.) customer specifications Isolation cards between the individual Eurocards are no longer necessary Compatability: meets the Eurocard standard DIN Isolation cabinet system Ex-TKS may be installed Label carrier accessory is available for delivery ED ERROR Power I/O I/O I/O I/O TE

15 Function Overview 4 Function Overview The following overview should aid you in finding the suitable product for your application. Sensors and Contacts Additional products and technical data may be found in the chapter on Transformer Isolated Amplifiers,page 21. i.e. ED2-SR-Ex4 NAMUR Sensors and Contacts Additional products and technical data may be found in the chapter on Transformer Isolated Amplifiers in Intrinsic Safety, page 85. i.e. ED2-SH-Ex2.R1 Rotation Speed Monitoring Additional products and technical data may be found in the chapter on Pulse Evaluation Units, page 99. Flow Measurement Additional products and technical data may be found in the chapter on Pulse Evaluation Units, page 99. i.e. EG1-M2-JT Power Supplies Additional products and technical data may be found in the chapter on Galvanically Isolated Analog Repeaters, page139. i.e. ED0-CS-Ex

16 Function Overview I/P Converter, Positioner Additional products and technical data may be found in the chapter on Galvanically Isolated Analog Repeaters, page 139. i.e. EGT-105 Valve Additional products and technical data may be found in the chapter on Solenoid Valve Driver Modules, page 121. i.e. ED2-VM-Ex4.35 Fire and Smoke Detectors Additional products and technical data may be found in the chapter on Galvanically Isolated Analog Repeaters, page139. i.e. ED0-CS-Ex4.51 LED Indicators Additional products and technical data may be found in the chapter on Solenoid Valve Driver Modules, page 121. i.e. EGA-041 Audible Alarms Additional products and technical data may be found in the chapter on Solenoid Valve Driver Modules, page 121. i.e. ED2-VD-Ex Potentiometer Additional products and technical data may be found in the chapter on Galvanically Isolated Analog Repeaters, page 139. i.e. EGC

17 Function Overview Pt 100 Additional products and technical data may be found in the chapter on Galvanically Isolated Analog Repeaters, page 139. i.e. ED2-TR-Ex1 Thermocouple Additional products and technical data may be found in the chapter on Isolated Repeaters, page 142. i.e. ED2-VR-Ex2.50M Transmitter Additional products and technical data may be found in the chapter on Transmitter Repeater Units and SMART Transmitter Repeater Units, page 165. i.e. EGT-101 SMART Transmitter Additional products and tecnical data may be found in the chapter on Transmitter Repeater Units and SMART Transmitter Repeater Units, page165. i.e. EGT

18 Model Number Key 5 Key to model numbers: E - -Ex. Pos. 6 Pos. 5 Pos. 4 Pos. 3 Pos. 2 Special Function Number of Channels Unit Function Level of Power Supply Type of Power Supply Position 1 E = Eurocard Position 2 D = DC Power Supply A = AC Power Supply Position 3 0 = Without Power Supply (loop powered) 2 = up to 24 V DC 6 = up to 230 V AC (only Current Supply) Position 4 CD = Current Driver CR = Current Repeater CS = Passive Current Repeater DW = Rotation Speed Monitor FSU = Frequency Current Converter GS = Trip Amplifier for Current / Voltage Signals GR = Trip Amplifier for Resistance Thermometer (RTD) IT = Pulse Divider PT = Potentiometer Converter RR = Resistance Repeater SD = Solenoid Driver SH = Safety Design SL = Solenoid Driver with Logic Input SOT = Switch Isolator with passive, potential free Transistor Output SR = Switch Isolator with Relay Output SRT = Switch Isolator with active Transistor and Relay Output ST = Switch Isolator with active Transistor Output STC = SMART-Transmitter Power Supply with Current Output STV = SMART-Transmitter Power Supply with Voltage Output TR = Resistive Temperature Device Converter TT = Thermocouple/mV Signal Converter UT = Universal Temperature Converter VD = Solenoid Driver VM = Solenoid Driver VR = Voltage Repeater WAC = Strain Gauge Converter with Current Output WAV = Strain Gauge Converter with Voltage Output 19

19 Model Number Key Key to Model Numbers for Switch Isolators E - - Pos. 5 Pos. 4 Pos. 3 Pos. 2 Design, Additional Function Type of Output Number of Channels Technical Design Key to Model Numbers for Other Device Groups E Pos. 6 Pos. 5 Pos. 4 Pos. 3 Pos. 2 Additional Function Function Device Series, Variations Device Group Technical Design Position 1: System E = Eurocard Position 2: Technical Design G = Galvanically Isolated R = Relay Card for Ex-i Circuit Switching Position 3: a) for Switch Isolators Number of Channels b) for other Device Groups A = Solenoid Drivers M = Trip Amplifiers C = Temperature Converters Position 4: a) for Switch Isolators Type of Output R = Relay Output RLK = Relay output with signaling of lead breakage and short circuit T = Transistor Output TLK = Transistor output with signaling of lead breakage and short circuit OT = Potential free transistor output OTLK = Potential free transistor output with signaling of lead breakage and short circuit b) other Device Groups Device Series, Variants Mn = Microprocessor Control (n = = Device Variants) nnn = Device Series, Variations of Galvanically Isolated Analog Devices and Solenoid Drivers (n = Zahl) Position 5: a) for Switch Isolators Design, Additional Function HF = High Frequency Design Bi = Bi-stable Design X, Y... = Modified Design of a Standard Device b) for other Device Groups Function FSU = Frequency Current Converter DW = Rotation Speed Monitor IT = Pulse Divider GLU = Synchronization Monitor DRM = Rotational Direction Indicator Position 6: not for Switch Isolators Additional Function X, Y... = Modified Design of a Standard Device 20

20 Contents 6.1 Transformer Isolated Amplifiers Page General Transformer Isolated Amplifiers with Relay Outputs Transformer Isolated Amplifiers with Relay and Active Transistor Outputs Transformer Isolated Amplifiers with Transistor Outputs Transformer Isolated Amplifiers with Passive Transistor Outputs Transformer Isolated Amplifiers with Active and Passive Transistor Outputs Transformer Isolated Amplifiers in Safety Applications 85 21

21 Introduction Transformer Isolated Amplifier General The purpose of the transformer isolated amplifier is to supply power to the proximity sensor in a hazardous area, to receive the path proportional current, to convert analog input signals into digital output signals and to transfer the switching signal to a control device (PLS, PLC etc.). The intrinsically safe interface of the transformer isolated amplifier is designed per [EEx ia] IIC. Essentially, the TIB consists of three components: the power supply, the transistor switch amplifier and the output stage. The input and the output are separated from one another by galvanic isolation. The TIB's input stage is a transistor switch amplifier which provides the intrinsically safe interface. This input stage is designed in accordance with DIN (NAMUR), meaning that the residual voltage in normal operation equals about 8 VDC and the short circuit current equals about 8 ma. The switch points are in a range between 1.2 ma and 2.1 ma, and the hysteresis equals 0.2 ma. Typical values for the input switch point is 1.6 ma and 1.8 ma for the output switch point. The controller circuit is monitored for lead breakage and lead short circuits. An exception to this are the more cost efficient SR2...-types, which are only monitored for lead breakage. A short circuit or lead breakage is signaled by a red LED and the output stage is reverted to the power-off state. The output relay is cut off, and the electrical output is locked. A fault signal output is available for LK-types (i.e. EG2-RLK); in the event of a fault, the LK module reports it to the controller and initiates the proper reactions. Aside from a proximity sensor, a mechanical contact can also be used as a signal initiator within the hazardous area. This also allows the circuitry to be monitored for short circuits and lead breakage for corresponding switching. Please refer to the data sheet for this switching. Relays as well as active and passive transistors are available as outputs. Alternators and A-contacts are available with the relay outputs. The B-contact response is possible with an A-contact through the reversal of the operating mode. The contact load is at AC 50 V and 2 A at a cos j > 0.7 or DC 30 V, or DC 40 V at 2 A and resistive load. The energized and de-energized delay consists of about 20ms; the maximum switch frequency is 25 Hz. The active transistor outputs deliver between 10 ma and 200 ma output current, depending on the version, at a switched output. The leakage current at a closed output is < 10 µa. The output voltage at a switched output is about 3.5 V lower than the supply voltage. The output signal is potentially bound and the outputs are short circuit protected. The maximum switch frequencies are at 3 khz or 5 khz. The passive transistor outputs are essentially potential free. The supply voltage is in the range of DC 10 V V, with a maximum nominal current of 100 ma. The voltage drop across the output stage is a maximum of 2.5 V. The leakage current is < 10 µa, the maximum switch frequency is at 3 khz and the input pulse delay is at < 0.6 ms. 22

22 Introduction Transformer Isolated Amplifier The output stage of a transformer isolated amplifier is based on the presence or absence of the target to be sensed. This flexibility is guaranteed through the reversal of the mode of operation. It should also be noted that an inductive proximity sensor shows the reversed bahavior of a switch. Capacitive, optical and magnetic sensors behave like a mechanical contact. The same device can be used in both cases with the aid of the reversal of the operating mode. The mode of operation is reversed at the respective connection with a Logic-0. Table: Mode of Operation Input Input Monitoring of Output Monitoring (intrinsically safe) (Operating Lead Lead (Transistor/ Output Mode) Breakage Short Circuit Relays) 1 k 10 k Logic-0 Yes Yes Logic-1 / Logic-0 energized without interruption in Input Circuit 1 k 10 k 1 k 10 k Logic-0 Yes Yes Logic-0 / Logic-0 de-energized Logic-1 Yes Yes Logic-0 / Logic-0 de-energized 1 k 10 k Logic-1 Yes Yes Logic-1 / Logic-0 energized Lead Breakage Logic-1 Yes Yes Logic-0 / Logic-1 de-energized Lead Breakage Logic-0 Yes Yes Logic-0 / Logic-1 de-energized Short Circuit Logic-0 Yes Yes Logic-0 / Logic-1 de-energized with interruption in Input Circuit Short Circuit Logic-1 Yes Yes Logic-0 / Logic-1 de-energized Lead Breakage Logic-1 No Yes Logic-0 / Logic-0 de-energized Lead Breakage Logic-0 No Yes Logic-1 / Logic-0 energized Short Circuit Logic-0 No Yes Logic-0 / Logic-1 de-energized Short Circuit Logic-1 No Yes Logic-0 / Logic-1 de-energized Short Circuit Logic-0 No No Logic-0 / Logic-0 de-energized Short Circuit Logic-1 No No Logic-1 / Logic-0 energized Attention: All other combinations are technically useless and can lead to faults. When using a mechanical contact as a pulse generator for lead breakage monitoring, the contact should be switched with a resistor of 10 kohm in parallel and 1 kohm in series. 23

23 Notes 24

24 Contents Transformer Isolated Amplifiers with Relay Output Page 2-Channel ED2-SR-Ex2 Relay Output: 2 changeover contacts per channel 26 4-Channel ED2-SR-Ex4 Relay Output: 2 changeover contacts per channel 26 8-Channel ED2-SR-Ex8 Relay Output: 1 A-contact per channel 28 25

25 Transformer Isolated Amplifiers ED2-SR-Ex2, ED2-SR-Ex4 Output: Relays Input I... Input IV EEx ia IIC Channel 1 d2- z2+ d2- z2+ d2- z2+ d2- z2+ Channel 2 d4- z4+ d4- z4+ d4- z4+ d4- z4+ Channel 3 d6- z6+ d6- z6+ d6- z6+ d6- z6+ Channel 4 d8- z8+ d8- z8+ d8- z8+ d8- z8+ Hazardous Area Channel 1 d2- z2+ Channel 2 d4- z4+ Channel 3 d6- z6+ Channel 4 d8- z8+ Microprocessor LB SC 2 Channel or 4 Channel U U WR yellow red Microprocessor + - Safe Area green U U Channel 1 d18 z18 b18 d20 z20 b20 d16 z16 b16 d14 z14 Channel 2 d22 z22 b22 d24 z24 b24 (L+) (L-) Channel 3 d26 z26 b26 d28 z28 b28 Channel 4 d30 z30 b30 d32 z32 b32 Output Output Output IX Supply Voltage I / III / V / VII II / IV / VI / VIII Combined Fault Signal ED2-SR-Ex2 ED2-SR-Ex4-2-Channel Model: ED2-SR-Ex2. Front View Type New Eurocard Housing (dimensions see page 11) - 4-Channel Model: ED2-SR-Ex4. - Control circuit EEx ia IIC. - DC 24 V Power supply nominal voltage. - LED s per NAMUR NE Reversible operating mode. - Optional Short circuit (SC) and lead breakage (LB) monitoring - 1 Signal output with 2 changeover contacts per channel. - 1 Relay output: combined fault signal. (optional: active transistor output) LED yellow/ red: Channel 1 LED yellow/ red: Channel 2 LED yellow/ red: Channel 3 LED yellow/ red: Channel 4 LED green: Power Supply yellow= Relay output red flashing= LB and SC - EMV per NAMUR NE 21 Issue Date

26 Transformer Isolated Amplifiers ED2-SR-Ex2, ED2-SR-Ex4 Output: Relays Technical Data Power supply Nominal voltage DC 20 V V Maximum voltage U m 40 V Ripple < 10 % Nominal current <100 ma Connections d14 (L+), z14 (L-) Inputs (intrinsically safe) Input I : Connections d2-; z2+ Input II : Connections d4-; z4+ Input III : Connections d6-; z6+ Input IV : Connections d8-; z8+ Nominal values IEC Open circuit voltage / short circuit current about DC 8 V / about 8 ma Switch point / switch hysteresis 1.2 ma ma / about 0.2 ma Input pulse length / pulse interval 0.5 ms / 0.5 ms Lead monitoring Breakage J 0.1 ma Short circuit J > 6 ma Certificates EC-type Examination Certificate PTB 99 ATEX 2163 X; for additinal certifications refer to the certificates Category, Type of protection II (1) G [EEx ia] IIC Declaration of conformity has to be considered Peak Values Voltage U V Current I 0 16 ma Power P 0 38 mw Allowable circuit values Ignition protection method, category EEx ia, ib EEx ia, ib EEx ia, ib IIA IIB IIC Max. external inductance L mh 530 mh 140 mh For further values see Max. external capacitance C µf 26 µf 3.6 µf EC-Type Examination Certificate Outputs (not intrinsically safe) Output I, II : Connections d18, z18, b18; d20, z20, b20 Output III, IV : Connections d22, z22, b22; d24, z24, b24 Output V, VI : Connections d26, z26, b26, d28, z28, b28 Output VII, VIII : Connections d30, z30, b30; d32, z32, b32 Output IX : combined faultsignal Connections b16, z16, d16 Contact load AC: 50 V / 0.5 A / cos ϕ > 0.7; DC: 30 V / 2 A Ohm load max. 60 W Mechanical life > 10 6 switchings Energized- / De-energized delay < 4 ms / < 4 ms Maximum voltage U m 125 V Optional, Output X: Transistor output, active Connections d16+, z16- Nominal current I out 100 ma, permanent short circuit protected Transfer characteristics Switch frequency Galvanic isolation Output I...VIII from each other Output I...VIII from power supply Output I...VIII and power supply from inputs 25 Hz Functional isolation per DIN EN , design isolation voltage 50 V eff Functional isolation per DIN EN , design isolation voltage 50 V eff Safe galvanic isolation per EN , voltage peak value 375 V Conformity to standards Explosion protection EN , EN Input IEC Isolation co-ordination per DIN EN Galvanic isolation per DIN EN Climatic conditions per DIN IEC 721 EMC / Electromagnetic compatability per EN / EN , NAMUR NE 21 Ambient temperature -25 C C (248 K K); Ex-application -20 C C (243 K K) Connection method 48-pin plug connector per DIN , Series 2, Type F; z, b and d provided Coding a1 / a9 Weight about 115 g Side View ON 1234 SC ON 1234 LB SC LB OFF OFF WR ON 1234 WR Issue Date DIP-Switches SC, SC1... SC4 DIP-Switches LB, LB1... LB4 DIP-Switches WR, WR1... WR4 OFF Short circuit monitoring with "ON" or "OFF" switch settings. Lead breakage monitoring with "ON" or "OFF" switch settings. Mode of operation is reversed with a switch setting of "ON". 27

27 Transformer Isolated Amplifier ED2-SR-Ex8 Output: Relay Input I... Input VIII EEx ia IIC Chan 1 Chan 2 Chan 3 Chan 4 Chan 5 Chan 6 Chan 7 Chan 8 d2- b2+ d4- d6- b4+ d8- z2- b6+ z4- z6- b8+ z8- Hazardous Area d2- b2+ d4- d6- b4+ d8- z2- b6+ z4- z6- b8+ z8- Connector Programming Socket K-A DP1 Interface for RS232-Adapter red MUX DEMUX U U + - yellow yellow yellow yellow yellow yellow yellow yellow green Safe Area b18+ d18 b20+ d20 z30 z32 d22 d24 d26 d28 d30 d32 b22 b24 b26 b28 b30 b32 z22 z24 z26 z28 z14 d14 (L-) (L+) Operating Fault Output Output Output Output Output Output Output Output Output Power Supply Mode Signal Fault Chan 1 Chan 2 Chan 3 Chan 4 Chan 5 Chan 6 Chan 7 Chan 8 Off Signal - 8-Channel Front View - Control circuit EEx ia IIC - DC 24 V supply voltage Type A (dimensions see page 10) - Reversible operating mode - Lead breakage (LB) and short circuit (SC) monitoring, LED: red, flashing LED green: Power Supply - Relay output, 1 A-contact per channel - LED yellow: switch status; flashing with lead breakage of the channel - 1 fault signal output with 1 A-contact (N.C.) - LED`s per NAMUR NE 44 - EMV per NAMUR NE 21 - Configuration by PC is possible Contact duplication Logical OR Arrangement: input - output Operating mode / channel Fault signal / channel LED red: Fault Signal LED's yellow: Electronic Output Chan Programming Socket Issue Date

28 Transformer Isolated Amplifier ED2-SR-Ex8 Output: Relay Technical data Power supply Nominal voltage DC 20 V V Connections d14(l+), z14(l-) Maximum voltage U m DC 40 V Ripple < 10% Power consumption about 4 W Inputs (intrinsically safe) Input channel : Connections d2-, b2+, d4-, d6-, b4+, d8-, z2-, b6+, z4-, z6-, b8+, z8- Nominal values per DIN (NAMUR) Open circuit voltage / short circuit current aboutdc 7.5 V / about 7.5 ma Switch point / switch hysteresis 1.2 ma ma / about 0.2 ma Input pulse length / pulse interval 1 ms / 1 ms Lead monitoring Bruch J 0.15 ma Short circuit J > 6 ma Certificate of Conformity Peak Values PTB Nr. Ex-95.D.2075X for further international certifications see page 232 Max. voltage U V Max. current I ma Max. power P 0 43 mw Allowable circuit values Ignition protection method, category [EEx ia] [EEx ib] Explosion group IIB / IIC IIB / IIC Max. external capacitance 1.67 µf / µf 8.0 µf / 1.7 µf Max. external inductance 9 mh / 5 mh 560 mh / 155 mh Output (not intrinsically safe) Output channel1... 8: Connections d22, d24; d26, d28; d30, d32; b22, b24; b26, b28; b30, b32; z22, z24; z26, z28 Output: Fault signal Connections z30, z32 Maximum voltage U m 253 V Contact load AC: 50 V / 1.2 A / 60 VA; DC: 30 V / 0.8 A / 24 W Mechanical life 2 x 10 7 switchings Energized- / de-energized delay 5 ms / 5 ms Transfer characteristics Switch frequency Galvanic isolation Output I... VIII from each other Output I... VIII from power supply Output I... VIII from power supply Input I... VIII < 10 Hz Safe isolation per DIN VDE 0106, design isolation voltage 50 V eff Safe isolation per DIN VDE 0106, design isolation voltage 50 V eff Safe Galvanic isolation per EN , voltage peak value 375 V Conformity to standards Input per DIN (NAMUR) Climatic conditions per IEC 721 EMC / Electromagnetic compatability per EN , EN , IEC 801/2 to 6, NAMUR NE 21 Ambient temperature -25 C C (248 K K) Connection method 48-pin plug connector per DIN , Series 2, Type F: z, b and d provided Coding a1 / a7 Weight 175 g Accessories K-ADP1 Programming connector for connecting isolated switch with the PC SOSA Software-Kit consisting of a 3.5" -Diskette (see page 270) Issue Date

29 Transformer Isolated Amplifier ED2-SR-Ex8 Output: Relay Function Description Notes on Input Switching Operating Mode The mode of operation of the output relays can be set by means of the bridge b18/d18 for all output relays. For this, the following arrangement applies: The 8-channel transformer isolated amplifier transfers the switch signals from sensors per DIN (NAMUR) or mechanical contacts. The ED2-SOT-Ex8 can be configured if necessary, by means of software. The K-ADP1 adapter cable provides the connection between Notebook/PC and the transformer isolated amplifier. The desired arrangement between the input channel and output channel can be configured by SOSA software. The assignment of multiple outputs to one input signal is possible (signal duplication). The assignment of multiple inputs to one output is also possible. It should be noted that in this case, the fault free inputs have priority in that the inputs assigned to an output are connected to a common output through an OR gate. The parameterization of only the desired monitoring functions is insufficient when monitoring an input for a lead fault. The fault signal output and the fault signal LED only function correctly when each input used is assigned an output LED. The mode of operation and the LB/SCcan be determined for each individual channel through the software. This allows for a desired mix of sensors and mechanical contacts with or without LB/SC. The software inverts the setting which is provided by bridges b18/d18 (mode of operation) or b20/d20 (fault signalling). If a lead fault is recognized, the respective output always becomes inactive (passive electronic output). The fault is indicated through the fault signal output and the red flashing LED. In the case of a channel fault, the yellow LED flashes. Sensors per DIN (NAMUR) are basically monitored for lead breakage and short circuit. Mechanical contacts must be switched respectively (10 kohm parallel to contact, 1 kohm in series to parallel switching) when monitoring the control circuit. If the 1 kohm resistor is left out, short circuit monitoring is disabled. If both resistors are left out, the control circuit is not monitored at all. Basically, the method of monitoring must be configured by means of the software. b18, d18 Input Output No bridge Logic-1 Switched Logic-0 Cut-off Bridged Logic-0 Switched Logic-1 Cut-off Issue Date

30 Contents Transformer Isolated Amplifier with Relays and Active Electronic Output Page 2-Channel EG2-R Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, with lead breakage signalling 32 EG2-R-Bi Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, for the connection of bistable sensors 34 EG2-RLK Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, with lead breakage or short circuit signalling 36 4-Channel EG4-R Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, with lead breakage signalling 40 EG4-R-Bi Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, for the connection of bistable sensors 44 EG4-RLK Relay Output: 2 changeover contacts per channel, 1 active electronic output with 10 ma per channel, with lead breakage or short circuit signalling 48 31

31 Transformer Isolated Amplifier EG2-R Output: Relays and Transistors - 2-Channel - Control circuit EEx ia IIC - DC 24 V supply voltage - Reversible operating mode - Lead breakage monitoring may be disabled - 1 Relay override input per channel - 1 Signal output with 2 changeover contacts per channel - 1 Active electronic output per channel Input Ι / Input ΙΙ EEx ia IIC mech. Contact with LB * LB Chan. 1 d2+ d4- d6 d8 Chan. 2 z2+ z4- z6 z8 mech. Contact without LB Chan. 1 d2+ d4- d2+ 10 kω d4- d2+ d4- Chan. 2 z2+ z4- z2+ z4- z2+ z4- Hazardous Area The transformer isolated amplifier transmits digital signals from the hazardous area. Sensors per DIN (NAMUR) or mechanical contacts may serve as alarms. The control circuit can be monitored for lead breakage monitoring (LB). LB 2 Channel Notes on connection assignment: Lead breakage monitoring (LB) d6, d8; z6, z8 Lead breakage monitoring can be disabled by bridging the above connections. If necessary, the unit can be supplied with the lead breakage monitoring feature already disabled by a factory installed jumper on the card. & & 1 1 yellow + - U U Safe Area Mode of operation d16; z16 Logic-1: no reversal of operating mode from input to output Logic-0: reversal of operating mode from input to output (see table of operating modes on page 23) If necessary, the operating mode can also be selected with a factory installed jumper on the card. Chan. 1 d16 d20 d24 d22 d26 d30 d28 d32 d18 d14 z14 Chan. 2 z16 z20 z24 z22 z26 z30 z28 z32 z18 (L+) (L-) Mode of Output Output Output Relay Supply Operation III / VI II / V I / IV Override Voltage Input * Bridge for disabling lead breakage monitoring Front View Type A (dimensions see page 10) LED yellow: Output Channel 1 LED yellow: Output Channel 2 Issue Date

32 Transformer Isolated Amplifier EG2-R Output: Relays and Transistors Technical data Power supply Nominal voltage DC 20.4 V V Ripple 10 % Nominal current about 60 ma Connections d14 (L+), z14 (L-) Inputs (intrinsically safe) Input I : Connections d2+, d4- Input II : Connections z2+, z4- Nominal values per DIN with respect to NAMUR Open circuit voltage / short circuit current about DC 8 V / about 8 ma Switch point / switch hysteresis 1.2 ma ma / about 0.2 ma Input pulse length / pulse interval 0.5 ms / 0.5 ms Lead monitoring Breakage J 0.1 ma Certificate of Conformity Peak Values PTB Nr. Ex-81/2065X for further international certifications see page 232 Max. voltage U V Max. current I 0 21 ma Max. power P 0 66 mw Allowable circuit values Ignition protection method, Category [EEx ia] [EEx ib] Explosion group IIB / IIC IIB / IIC Max. external capacitance 1.1 µf / 0.37 µf 3.9 µf / 0.8 µf Max. external inductance 5 mh / 2 mh 260 mh / 70 mh Input (not intrinsically safe) Signal level Logic-1 Signal level Logic-0 Input current Input delay DC 15 V V DC 0 V... 5 V or B-contact input 1 ma 5 ms ms (typically 10 ms) Connections d16, z16 Outputs (not intrinsically safe) Output II, I : Connections d30, d28, d32; d24, d22, d26 Output IV, V : Connections z30, z28, z32; z24, z22, z26 Contact load AC: 50 V / 2 A / cos ϕ = 1 / 1 A / cos ϕ = 0,3; DC: 40 V / 100 W Ohm load Mechanical life 2 x 10 5 switchings Energize- / De-energize delay about 12 ms / about 5 ms Output III, VI: Transistor output, active Connections d20, z20 Nominal current 10 ma, short circuit proof Signal level Logic-1 / Logic-0 (L+) -5 V / 0.9 V or cut off output (leakage current J 10 µa) Transfer characteristics Output I, II, IV, V: switch frequency Output III, VI: switch frequency Galvanic isolation Output I... VI from each other Output I... VI from power supply Output I... VI and power supply from input 25 Hz 1 khz Safe isolation per DIN VDE 0106, design isolation voltage 50 V eff Safe isolation per DIN VDE 0106, design isolation voltage 50 V eff Safe galvanic isolation per EN , voltage peak value 375 V Conformity to standards Input per DIN (NAMUR) Climatic conditions per DIN IEC 721 Ambient temperature -25 C C (248 K K) Connection method 32-pin plug connector per DIN , Series 2, Type F; z and d provided Coding a3 / c3 Weight about 200 g Issue Date