I n t ro d u c t i o n — S u r g e P ro t e c t i o n D e v i c e s SD Series SLP Series Data and Signal Protection The SD Series are ultra-slim user-friendly devices for protecting electronic equipment and systems against surges on signal and I/O cabling, and the SLP Series provides 20kA power surge protection for process control, equipment systems and distribution panels. Product Features: • Range of ATEX Certified intrinsically safe surge protectors • Ultra-slim and space saving designs; easy installation • Multistage hybrid protection circuitry - 10kA maximum surge current for SD Series, and 20kA maximum surge current for SLP Series • Range of voltage ratings ideal for process I/O applications MA15 Series AC & DC Power Protection The MA15 Series of surge protection devices protects electronic equipment and computer networks against the effects of noise pollution induced in power supplies. MA15 units filter out and suppress the effects of industrial noise and surges caused by lightning, switching devices, thyristor controls, transmission system overloads and power-factor correction circuits. • Designed for high bandwidth, low resistance applications; RTD, Public Switch Telephone Network (PSTN) and 3-wire transmitter versions available in SD Series • Surge protection for two loops or one 4-wire circuit per SLP Series module • 10 year product warranty The SD and SLP Series surge protection devices provide unparalleled packing densities, application versatility, proven and reliable hybrid circuitry, simple installation and optional ‘loop disconnect’ facilities (SD Series). These features make the SD and SLP Series the ultimate surge protection solutions for process control equipment, I/O systems and communications networks. Product Features: • 18kA surge protection and RFI filtering TP48 Series • Protects panel loads up to 15 Amps in series, unlimited Amps in parallel Transmitter and Sensor Protection • Suitable for AC or DC application • Thermal and short circuit protection • LED status indication feature • 10 year product warranty The TP48 Series of transmitter protectors safeguards electronic process transmitters against induced surges and transients from field cabling. They uniquely provide a level of protection for 2, 3 and 4 wire field-mounted transmitters that greatly exceeds the optional transient protection facilities available from the transmitter manufacturers without any additional wiring, conduit modifications or other expensive extras. Product Features: • Easy and direct mounting – simply screw into spare conduit entry • Intrinsically safe; flameproof to CENELEC standards; ATEX approved • Parallel connection avoids introduction of resistance into loop 75 I n t ro d u c t i o n — S u r g e P ro t e c t i o n D e v i c e s SD Series SLP Series The exceptionally high packing densities are the result of an ultra slim footprint for individual modules, which can double-up as feedback terminals. Each module provides full hybrid surge protection for 2 and 3-wire loop protection. The multi-stage hybrid surge protection network at the heart of the SLP uses a combination of solid state electronics and a gas filled discharge tube (GDT) to provide surge protection up to 20kA. This impressive surge protection circuit is designed to exhibit exceptionally low line resistance and adds only a minimal voltage drop to the circuit. Modules with a comprehensive range of voltage ratings cover all process related signals such as RTDs, Thermo- couples (THCs), 4 - 20mA loops, telemetry outstations, shut-down systems and fire and gas detectors. The optional loop disconnect featured on the SD07, SD16, SD32 and SD55 modules allows users to perform commissioning and maintenance without removing the surge protection device. In addition, a third connection on the field and safe side of the module is provided for safe termination of shields. For three wire applications the specially designed SDRTD (Resistance Temperature Detector) and the SD32T3, (for separately powered 4 - 20mA loops) provide full 3-wire protection in a single compact unit. The SD07R3 provides protection of 3-wire pressure transducers on low power circuits. For higher bandwidth applications, the SDR Series meets the demands of today’s highest speed communication systems. 120V and 240V AC versions are available for I/O and power supplies up to three Amps of load current. Publc Switched telephone networks can be protected by the SDPSTN. All modules are DIN-rail mountable on a TS-35 rail. A comprehensive range of mounting and grounding accessories are available. 76 The SLP device does not adversely affect the performance or operation of the loop or combined equipment during operation. The device allows signals to pass with very little attenuation, while diverting surge currents safely to the ground and clamping output voltages to safe levels. Fully automatic in operation, SLP devices react immediately to ensure that equipment is never exposed to damaging surges between lines or the lines and ground. Reacting instantly, the SLP redirects surges safely to the ground and resets automatically. The versatile SLP series provides full hybrid surge protection, combining protection for two process loops into one case. For higher bandwidth applications, the SLP series has been developed to meet the demands of today’s highest speed communication systems. S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s SD Series Guide to applications and selection The SD Series of signal protection devices includes models for a full range of applications operating at voltages up to 250V ac. The optional fuse/disconnect package provides both fused protection against fault currents and a convenient method of isolating field circuitry from protected circuitry without requiring additional disconnect terminals. The standard fuse (replaceable) is rated 250mA. 50mA fuses are available by special request. Solid links can be used in applications where only the disconnect feature is required. This feature is important in applications where a signal protection device is used with a bulk power supply feeding multiple loops. The individual fuse module prevents a fault or follow on current on one loop disrupting the power supply to the others. In addition, loops can be removed from the circuit for maintenance or added without requiring additional disconnect terminals. The following guide provides application information for the SD series. For technical information, see page 84. PROTECTED CIRCUIT FIELD CIRCUIT Analog inputs (high-level) Bulk PSU 2-wire transmitters, 4-20mA, conventional and smart SD32 and SD55 are recommended for use with conventional and smart 4-20mA transmitters (fed by a well-regulated supply), the choice dependent upon the maximum working voltage of the system (32V and 55V respectively). The diagram illustrates an application using the fuse/disconnect. Both models are available in ‘X’ versions without the optional fuse/disconnect feature. 1 Up to 50V dc 4/20mA 1 to 5V 2 4 TP48 transmitter protector 5 6 3 SD32 SD55 SD32X SD55X (no fuse) Multiple Loops 2-wire transmitters Analog inputs (low-level) SDRTD RTDs, Thermocouples (THCs) and mV sources using the SDRTD. 1 4 5 For optimum accuracy, the energizing current should be chosen to ensure the voltage across the RTD does not exceed 1V over the full measurement range. When using a PT100 device, an energizing current of 1mA is recommended. Recorder Controller Computer etc. 2 6 3 SDRTD 3-wire RTDs 2xSD07X or 2xSD16X Photocells and turbine flowmeters Depending upon the operational voltage, the SD07 or SD16 are the preferred choices for this application. SD07X and SD16X are also suitable. 1 4 Photocell Thermocouple (THC) Signal 5 mV source 2 Turbine Flowmeter 6 3 SD07 SD16 SD07X SD16X (no fuse) photocells, thermocouples (THCs), mV sources and turbine flowmeters 77 S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Analog outputs PROTECTED CIRCUIT FIELD CIRCUIT Controller outputs (I/P converters) 2xSD15X, SD32X Dependent on the working voltage, recommendations include the SD16, SD32 and SD55, and the equivalent ‘X’ versions. 1 4 P V I 5 2 6 OV 3 SD16 SD32 SD35 SD16 SD32X SD55X (no fuse) Controller outputs (I/P converters) Digital (on/off) inputs - Switches SD Suitable signal protection devices include the SD07, SD16, SD32 and SD55 modules, and the equivalent “X” versions. The choice is dependent upon the operating voltage of the system. 1 4 5 V 2 6 Logic Signal 3 SD07 SD16 SD32 SD55 SD07X SD16X SD32X SD55X OV (no fuse) Switches Digital (on/off) outputs Alarms, LEDs, solenoid valves, etc. SD32X 1 4 LED Alarm 5 The SD32 or SD32X are the recommended choice for this application. 32V max 2 6 3 SD32 SD32X (no fuse) Alarms, LEDs, solenoid values, etc. 4 Incoming Telephone Line Telemetry Public Switch Telephone Network (PSTN) - Telemetry outstations 1 5 Modem, fax or telephone 2 6 3 The SDPSTN has been designed specifically for the protection of signals transmitted on public switched telephone networks. Telecom line AC supplied equipment - PLC, I/O systems The recommended choice or systems on 110-120V ac is the SD150X ; for 220-240V ac systems, the SD275X is recommended. 5 6 PLC, I/O systems 78 4 110/120V ac or 220/240V ac Final output from 1 PLC, DCS, SCADA, etc. 2 3 S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Transmitter and sensor protection Transmitters and sensors are widely used in highly exposed areas and where lightning damage is common. In many cases, the ideal solution for 2-wire transmitters or sensors is the TP48, which mounts directly onto the transmitter via spare conduit entries or a tee fitting. Where these entries are not available or 3-wire devices are used, the compact design and simple installation of the SD Series makes it an ideal choice for transmitter protection. The SDs within the junction box should be installed as close as possible to the sensor or transmitter they are protecting, but no further than one meter away. A bond is required from the general mass of steelwork to the sensor or transmitter housing, using either a flat short braid or a cable at least 0.16 inch2 (4mm2) cross sectional area. In most instances, this bond is made automatically by fixing the metallic transmitter housing to the plant structure and ensures the voltage difference between the signal conductors and the transmitter housing is below the transmitter’s insulation rating. Please note that the transmitters or sensors are connected to the SD protected equipment terminals, not the field cables. 2-wire transmitters or sensors TO HOST CIRCUIT SD PROTECTED FIELD CIRCUIT 4-20mA transmitters - conventional and smart The SD16X, SD32X and SD55X are an excellent alternative if the TP48 is not an acceptable solution, either because of technical suitability or mounting difficulties. 1 4 4-20mA 2 5 6 3 Plant structure SD16X SD32X SD55X SPD DIN rail 2-wire transmitter or sensor 3-wire transmitters or sensors Vibration Sensors and 4-20mA loop process control systems generally require three wire connections when powered from an external source. This may be accomplished in one unit by using the SD32T3 3- terminal Surge Protection Device (SPD). Because the SD32T3 protects all three conductors within the same unit, higher protection is achieved because the SPD hybrid circuitry is common to all three wires. 4 1 2 Plant structure 24V 5 3 4-20mA 6 Common OV SD32T3 The SD07R3, SD16R3, SD32R3 and SD55R3 are also suitable for the protection of 3-wire pressure transducers on low power circuits. SPD DIN rail 3-wire transmitter or sensor 1 4-wire transmitters or sensors Flow meters, level detectors, etc. 4-wire systems such as level detectors require two SDs, one for the supply and the other for the transmitter output. Generally the voltages across the pairs are similar, so the recommended choice is a pair of SD16X, SD32X or SD55Xs. Dependent upon the supply voltage, AC powered transmitters should be protected with an SD150X for the supply inputs. 4 4-20mA 2 5 6 3 1 4 Supply voltage Plant structure 2 5 Supply OV 6 3 SD16X SD32X SD55X SPD DIN rail 4-wire transmitter or sensor 79 S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Communication systems protection High-speed data links between buildings or one part of a plant to another have become more common with the widespread use of smart transmitters and the increase in remote installations. The SD Series has an SPD suitable for all process I/O applications with a choice of low resistance units, high bandwidth and a variety of voltage ranges. Featuring an extremely high bandwidth, the SDR Series is designed to meet the requirements for high speed data links. Communication systems RS232, RS422, RS485 SD PROTECTED HOST CIRCUIT TP PROTECTED FIELD CIRCUIT The recommended choice for these applications is the SD16R or SD32R depending on the maximum driver signal. 4 TP48 1 5 2 6 3 RS232, RS422, RS485 SD PROTECTED HOST CIRCUIT PROTECTED FIELD CIRCUIT Bus powered systems 1 There are a variety of bus powered systems specially designed for the process industry. The ideal surge protection device for these systems is the SD32R, with a very high bandwidth and modest in-line resistance. 4 4 5 2 6 3 1 5 2 6 SD32R (no fuse) 3 SD32R (no fuse) TP48 4 5 6 1 2 3 SD32R (no fuse) Bus powered systems Typical Applications Table 1 shows suitable SD devices for different applications. In some applications alternative devices may be used, for example, where lower in-line resistance or a higher voltage power supply is used. MTL Surge Technologies has operationally tested the recommended SD Series units with the representative highways listed. However, no formal approval for their use in these systems has been sought from the respective bodies. Table 1 Application Allen Bradley Data Highway Plus Preferred Part No. Alternate Part No. SD16R Foundation Fieldbus 31.25kbits/s voltage mode SD32R 1.0/2.5 Mbits/s SD55R HART SD32X SD32, SD32R Honeywell DE SD32X SD32, SD32R LonWorks FFT-10 SD32R LPT-10 SD55R TP-78 SD07R IS78† Modbus & Modbus Plus (RS485) SD32R SD16R PROFIBUS DP PA (IEC 1158, 31.25 kbits/s) SD32R SD32R RS232 SD16 RS422 SD07R RS423 SD07R RS485 SD07R WorldRP (IEC 1158) SD32R 31.25 kbits/s voltage mode 1.0/2.5 Mbits/s 80 SD55R SD16X S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Hazardous area applications Zone0/Zone1 The dangers from lightning induced sparking in Zone 0 are considered real enough to require preventative measures. IEC 60079-14 (1996-12) Electrical apparatus for explosive gas atmospheres Part 14: Electrical installations in hazardous areas (other than mines) stresses the importance of SPDs in hazardous areas. An outdoor installation where there is a high likelihood of both lightning induced transients and combustible gases requires the installation of SPDs to prevent possible ignition of the gases. Areas seen particularly at risk include flammable liquid storage tanks, effluent treatment plants, distillation columns in petrochemical works and gas pipelines. SPDs for transmitter protection should be installed in Zone 1, sufficiently close to the Zone 0 boundary to prevent high voltages entering Zone 0. The distance from the SPD to Zone 0 should be less than 36” where possible. In practice the SPD would normally be mounted on the transmitter or sensor housing which usually lies in Zone 1 and is very close to Zone 0. Because there is only a very small free volume, the SD series is suitable for mounting in flameproof or explosion proof enclosures. Zone 2 The SD series is suitable for protecting electrical circuits in Division 2, Zone 2 and can be used without affecting the safety aspects of the circuit. Non-incendive (low-current) circuits can be protected using any SD series unit mounted in either the safe or hazardous area, including those with the fuse disconnects facility. Non-arcing (high current) circuits can also be protected, however SPDs with the fuse disconnect facility may only be mounted in the safe area. For use in these circuits the units must be mounted in a suitable enclosure. In most cases the minimum requirements are IP54 and 7Nm resistance to impact. The SD series is self certified by MTL Surge Technologies as suitable for this purpose. The certification parameters for the SD**R, SD**R3 and SDRTD are: EEx ia IIC T4, Li = 0 li = 260mA for Ui up to 60V The power rating for each of the above is dependent on the table shown below. Pi = 1W (–30°C to +75°C) Pi = 1.2W (–30°C to +60°C) Pi = 1.3W (–30°C to +40°C) The SD** series are classified as simple apparatus and are intended for use in Zone 2 or safe areas only, because their fuses are not fully encapsulated. Installation Positioning The SDs should be mounted on the field wiring side to ensure that any surges entering from the field do not damage any intrinsically safe barriers or galvanic isolators in the system. The SDs and intrinisically safe interface should be mounted close to each other but on separate DIN-rails in order to maintain the required 1.97” (50mm) clearance between safe area and hazardous area terminals of the IS interface. SD series DIN rail IS barrier DIN rail Instrument Field cables Instrument earth Substation ground mat Certification Introducing surge protection into Intrinsically Safe (IS) circuits is trouble free as long as the current and power parameters are not exceeded. In the SD series, the SD**X, SD**R, SD**R3, SDRTD and SD**T3 all have ATEX certification for use in IS circuits located in Zones 0, 1 or 2. The certification parameters for the SD**X and SD**T3 are: EEx ia IIC T4, Li = 0.22mH li li li li = = = = 260mA for Ui up to 20V 175mA for Ui up to 26V 140mA for Ui up to 28V 65mA for Ui up to 60V Grounding The recommended grounding for field-mounted devices has been illustrated previously. The grounding at the control panel is more critical as there are usually a number of grounding systems, each with their own requirements.The grounding system illustrated here replaces the instrument 0V bond, the control system PSU bond and the IS ground with one single ground connection to meet all the design requirements and give the most effective protection against the effects of lightning induced surges. Marshalling cabinet System Connection Cable SPD Isolated instrument rail Isolated instrument rail Electrical earth Frame connection Floor void System earth To plant/neutral star point In all installations utilizing safety related apparatus, consideration should be given to protecting the system supply and any long communication cable. 81 S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Protection Full hybrid line to line Each line to screen/ground Max. discharge surge current (Imax) (8/20µs) 10kA (8/20μs) 6.5kA (SD150X and SD275X only) Max. discharge surge current (isn) 3kA (8/20μs) Lightning impulse current (Iimp) (10/350µs) 2.5kA 1.0kA (SD150X and SD275X only) Response time <1ns RTD resistance range (SDRTD) 10 to 1500Ω Degradation accuracy (SDRTD at 1mA) 0.1% (RTD resistance > 100) 0.1W (RTD resistance < 100) Ambient temperature –40°C to +80°C - working (-40°F to 176°F) –40°C to +80°C - storage (-40°F to 176°F) Humidity 5 to 95% RH (non-condensing) Category tested A2, B2, C1, C2, C3 Overstressed fault mode In=3kA 12kA 9kA (SD150X and SD275X only) Impulse durability (8/20µs) 10kA 6.5kA (SD150X and SD275X only) Terminals 2.5mm2 (12 AWG) Mounting T-section DIN-rail 35 x 7.5 or 35 x 15mm rail (1.38” x 0.3” x 0.6”) Weight 70g approximately (2.5oz) Case flammability UL94 V-2 AC durability 1Arms, 5T Service conditions 80kPa - 160kPa 5% - 95% RH EMC compliance To Generic Immunity Standards, EN 50082, part 2 for industrial environments R&TTE compliance EN 50082-2 : 1995 EN 41003 : 1999 EN 60950 : 1992 (not applicable to SD150X and SD275X) LVD compliance SD150X & SD275X EN 60950 : 1992 EN 61010 : 1995 SDPSTN EN 41003 : 1999 IEC compliance EN 61643-21:2001 Approvals Standard Certificate/File No. Approved for Product Canada, USA (CSA/C/US) Country (Authority) CSA C22.2 No. 0-M1991 CSA C22.2 No. 157-M1992 UL 913, 5th edition CSA C22.2 No. 142-M1987 CSA C22.2 No. 213-M1987 UL 508, 17th edition UL 1604, 3rd edition LR 103652-3 EEx ia Class 1, Groups A, B C and D, T4 Class 1, Div 2 Groups A,B,C, D T4 SD07,SD16,SD32,SD55, SD07X,SD16X,SD32X, SD55X,SD07R,SD16R, SD32R,SD55R,SDRDT, SD32T3,SD07R3,SD16R3, SD32R3,SD55R3 USA (UL) UL 497B Listed E220693 Isolated loop communication circuits SD07,SD16,SD32,SD55 SD07X,SD16X,SD32X SD55X,SD07R,SD16R SD32R,SD55R,SD07R3 SD16R3,SD32R3,SD55R3 SD32T3,SD55T3, SD07X3,SD16X3,SD32X3, SD55X3,SDRTD USA, Canada (UL) UL 1449 Recognized Component E217523 AC power protection SD150X,SD275X 0.28” +0.4mm -0.0mm 4 7.0mm 1 2 5 6 3 3.9” (99mm) Ordering Data Technical Data Nominal voltage+(Un) Vdc Nominal voltage+(Un) Vac Nominal current (In) mA Series resistance W/line Max. leakage current μA Rated voltage (MCOV) Uc Voltage protection level (Up) @1kV/μs V Residual voltage @ isn V Bandwidth frequency fG Special feature Ordering Data Technical Data Nominal voltage+(Un) Vdc Nominal voltage+(Un) Vac Nominal current (In) mA Series resistance W/line Max. leakage current μA Rated voltage (MCOV) Uc Voltage protection level (Up) @1kV/μs V Residual voltage @ isn V Bandwidth frequency fG Special feature 82 +0.02” -0.0” 4.03” (102.1mm) 0.28” rail (7mm) 4.32” (109.6mm) 0.6” rail (16mm) All figures typical at 77°F (25°C) unless otherwise stated 3.99” (101.3mm) Specifications SD Series Part No. SD07 Part No. SD16 Part No. SD32 Part No. SD55 7 5 250 4.2 500 7.7 <12 16 11 250 4.2 5 17 <25 32 22 250 4.2 5 36 <45 55 38 250 4.2 5 62 <90 30 25 fuse disconnect 40 25 fuse disconnect 60 25 fuse disconnect 100 25 fuse disconnect Part No. SD07R Part No. SD16R Part No. SD32R Part No. SD55R 7 5 400 2.7 500 7.7 <12 16 11 400 4.7 5 17 <25 32 22 400 10 5 36 <45 55 38 400 10 5 62 <90 30 50 high Bandwidth 40 50 high Bandwidth 60 50 high Bandwidth 100 50 high Bandwidth S u r g e P ro t e c t i o n D e v i c e s — S D S e r i e s Ordering Data Technical Data Nominal voltage+(Un) Vdc Nominal voltage+(Un) Vac Nominal current (In) mA Series resistance W/line Max. leakage current μA Rated voltage (MCOV) Uc Voltage protection level (Up) @1kV/μs V Residual voltage @ isn V Bandwidth frequency fG Special feature Ordering Data Technical Data Nominal voltage+(Un) Vdc Nominal voltage+(Un) Vac Nominal current (In) mA Series resistance W/line Max. leakage current μA Rated voltage (MCOV) Uc Voltage protection level (Up) @1kV/μs V Residual voltage @ isn V Bandwidth frequency fG Special feature Ordering Data Technical Data Nominal voltage+(Un) Vdc Nominal voltage+(Un) Vac Nominal current (In) mA Series resistance W/line Max. leakage current μA Rated voltage (MCOV) Uc Voltage protection level (Up) @1kV/μs V Residual voltage @ isn V Bandwidth frequency fG Special feature Part No. SD07X Part No. SD16X Part No. SD32X Part No. SD55X 7 5 400 2.2 500 7.7 <12 16 11 400 2.2 5 17 <25 32 22 400 2.2 5 36 <45 55 38 400 2.2 5 62 <90 30 25 low resistance 40 25 low resistance 60 25 low resistance 100 25 low resistance Part No. SD32T3 Part No. SD07R3 Part No. SD16R3 Part No. SD32R3 Part No. SD55R3 32 22 400 2.2 5 36 <45 7 5 400 2.7 500 7.7 <12 16 11 400 4.7 5 17 <25 32 22 400 10 5 36 <45 55 38 400 10 5 62 <90 60 720 3 terminal 30 50 3 terminal 40 50 3 terminal 60 50 3 terminal 100 50 3 terminal Part No. SDRTD Part No. SDPSTN Part No. SD150X Part No. SD275X 1 0.75 >10 2.7 0.3 5 <12 162 114 550 4.7 5 175 <200 170 120 3A 0.1 250 ac rms; 170 ac 130 ac rms <400 339 240 3A 0.1 250 ac rms; 350 ac 275 ac rms <700 30 50 3-wire RTD 235 4 PSNT 450 high current 850 high current Mounting Accessories 0494920000 Rail Holder Grounding/Ground Rail Accessories 1010100000 Ground terminal, DIN rail mounted Accessories (Replacement) SDF25 Replacement fuse pack 250mA standard Preferred Alternate Application Part No. Part No. Application Allen Bradley Data Highway Plus Foundation Fieldbus 31.25kbits/s voltage mode 1.0/2.5 Mbits/s HART Honeywell DE LonWorks FFT-10 LPT-10 TP-78 IS78† Modbus & Modbus Plus (RS485) SD16R SD32, SD32R SD32, SD32R PROFIBUS DP PA (IEC 1158, 31.25 kbits/s) RS232 RS422 RS423 RS485 WorldRP (IEC 1158) 31.25 kbits/s voltage mode 1.0/2.5 Mbits/s SD32R SD55R SD32X SD32X SD32R SD55R SD07R SD32R SD16R Preferred Alternate Part No. Part No. SD32R SD32R SD16 SD07R SD07R SD07R SD32R SD16X SD55R 83