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Applications 

 

9.4 Overload protection in the 24 V output circuit 

 

SITOP PSU8200 3ph 

50

 

Manual, 11.2014, C98130-A7638-A1-2-7629 

9.4

 

Overload protection in the 24 V output circuit 

If an overload occurs, the electronic current limiting function limits the SITOP PSU8200 

output current to a maximum value (see Section Technical data (Page 29)). The output 

cables are protected against a thermal overload if they are dimensioned corresponding to 

the maximum rms output current, or protected using additional components (for example, 

miniature circuit breaker, fuses). 
However, a load circuit that fails as a result of overload, for instance, should frequently be 

reliably and quickly identified and specifically switched off before the power supply goes into 

current-limiting mode (in current-limiting mode, the supply voltage would also be reduced for 

all of the remaining 24 V loads). 
The SITOP PSE200U selectivity module with 4 outputs (versions with adjustable output 

current range for each output from 0.5-3 A and 3-10 A) is available for this purpose; this 

monitors the 24 V branches for overload and short-circuit (Figure 9-5 Electronic protection of 

24 V consumers with the SITOP PSE200U selectivity module (Page 50)). Brief current 

peaks, e.g. as a result of a high inrush current, are permitted, and branches with a longer 

overload are switched into a no-current condition. This is also ensured for cables in a high-

ohmic condition and for short-circuits that slowly develop over time. 
When an output fails, the fault is signaled using a group signal contact or as a single channel 

signal, and the branch of the module involved is displayed using an LED.  
For versions with single-channel signaling, function blocks for evaluation purposes are 

available at no charge for SIMATIC S7-1200/1500/300/400, for STEP 7 and TIA Portal as 

well as for SIMOTION CPUs and SIMOTION SCOUT. 
You can find additional information at: 
SITOP PSE200U selectivity module manuals 

(

http://support.automation.siemens.com/WW/view/en/10807226/130000

) 

 

Figure 9-5 

Electronic protection of 24 V consumers with the SITOP PSE200U selectivity module 

Summary of Contents for 6EP1437-3BA10

Page 1: ...__ ___________________ SITOP power supply SITOP PSU8200 3ph Manual SITOP PSU8200 24 V 20 A 6EP3436 8SB00 0AY0 SITOP PSU8200 24 V 40 A 6EP1437 3BA10 11 2014 C98130 A7638 A1 2 7629 Overview Notes on safety 1 Description device design dimension drawing 2 Mounting removing 3 Mounting position mounting clearances 4 Installation 5 Technical data 6 Safety approvals EMC 7 Ambient conditions 8 Applications...

Page 2: ...operated only by personnel qualified for the specific task in accordance with the relevant documentation in particular its warning notices and safety instructions Qualified personnel are those who based on their training and experience are capable of identifying risks and avoiding potential hazards when working with these products systems Proper use of Siemens products Note the following WARNING S...

Page 3: ...or 25 ms Extra Power with 1 5x rated current for 5 seconds for switching on loads with a high inrush current Especially low width without requiring any lateral mounting clearances Ambient temperature 25 70 C Selectable short circuit response constant current or latching shutdown A soft characteristic can be selected for a parallel connection for uniform load distribution of power supply units of t...

Page 4: ... versions are available Regulated power supply unit SITOP PSU8200 3ph Type Order number 3 phase 400 500 V AC input 24 V 20 A output 6EP3436 8SB00 0AY0 3 phase 400 500 V AC input Output 24 V DC 40 A 6EP1437 3BA10 Accessories Type Order number Device identification labels 20 mm 7 mm Ti grey 3RT2900 1SB20 ...

Page 5: ...6 Block diagram 15 2 7 Dimensions and weight 16 3 Mounting removing 17 4 Mounting position mounting clearances 19 4 1 Standard mounting position 19 4 2 Other mounting positions 21 4 2 1 6EP3436 8SB00 0AY0 21 4 2 2 6EP1437 3BA10 23 5 Installation 25 5 1 Line side connection 25 5 2 Output side connection 27 6 Technical data 29 6 1 Input 29 6 2 Output 30 6 3 Efficiency 34 6 4 Closed loop control 35 6...

Page 6: ...bient conditions 43 9 Applications 45 9 1 Parallel connection to increase power rating 45 9 2 Parallel connection for redundancy 47 9 3 Series connection for increased voltage 49 9 4 Overload protection in the 24 V output circuit 50 9 5 Protection against short time voltage dips 51 9 6 Protecting against longer power failures 52 10 Environment 55 11 Service Support 57 ...

Page 7: ...al injury as well as extensive property damage Only appropriately qualified personnel may work on or in the vicinity of this equipment Perfect safe and reliable operation of this equipment is dependent on proper transportation storage installation and mounting Before installation or maintenance work can begin the system s main switch must be switched off and measures taken to prevent it being swit...

Page 8: ...Notes on safety SITOP PSU8200 3ph 8 Manual 11 2014 C98130 A7638 A1 2 7629 ...

Page 9: ... can be set via a potentiometer is available at the output of the device The output of the device is isolated no load proof and short circuit proof The LED displays indicate the operating state The operating state of the device can be processed via the signaling contact Line input DC output Potentiometer 24 28 8 V Pilot lamps 24 V O K OVERLOAD SHUTDOWN Signaling contact A B selector switch Natural...

Page 10: ...age The output terminals are used to connect to the loads to be supplied see also Section Installation Page 25 Connections and terminal designations Line input L1 L2 L3 PE One screw terminal each output 2 screw terminals output 2 screw terminals signaling contacts 13 14 One screw terminal each 1 Do not subject the end stop to higher loads Figure 2 2 Terminal data 6EP3436 8SB00 0AY0 1 Do not subjec...

Page 11: ... voltage drops across long supply lines to the connected load Figure 2 4 Potentiometer NOTICE Thermal overload possible When adjusting the output voltage to 24 V the output current must be derated by 4 V or the permissible ambient temperature must be taken into account with 3 C V Note It is only permissible to use an insulated screwdriver when actuating the potentiometer For notes on actuating the...

Page 12: ...NO contact rating 60 V DC 0 3 A for 24 V O K Figure 2 5 Operating display and signaling Signaling 6EP3436 8SB00 0AY0 24 V 20 A 6EP1437 3BA10 24 V 40 A Green LED lit Signaling contact contacts 13 14 closed Normal operation output voltage 20 V 0 5 V Normal operation output voltage 20 V 0 5 V LED off Signaling contact contacts 13 14 open quiescent position No supply voltage No supply voltage Yellow L...

Page 13: ...7629 13 Signaling 6EP3436 8SB00 0AY0 24 V 20 A 6EP1437 3BA10 24 V 40 A Red LED lit Signaling contact contacts 13 14 open quiescent position Latching shutdown Latching shutdown LED flashing red Signaling contact contacts 13 14 open quiescent position Overtemperature power OFF ON after 3 min Overtemperature power OFF ON after 3 min ...

Page 14: ...le operation The output voltage is inde pendent of the output current B influences the output characteristic in the overload range Latching shutdown If the output current rises above the rated value and above the current limit the device reduces the output voltage see Figure 6 7 Output characteristic curve 6EP3436 8SB00 0AY0 latching shutdown Page 33 and Figure 6 8 6EP1437 3BA10 latching shutdown ...

Page 15: ...Description device design dimension drawing 2 6 Block diagram SITOP PSU8200 3ph Manual 11 2014 C98130 A7638 A1 2 7629 15 2 6 Block diagram Figure 2 7 Block diagram ...

Page 16: ...6 Manual 11 2014 C98130 A7638 A1 2 7629 2 7 Dimensions and weight Figure 2 8 Dimension drawing 6EP3436 8SB00 0AY0 Figure 2 9 Dimension drawing 6EP1437 3BA10 6EP3436 8SB00 0AY0 24 V 20 A 6EP1437 3BA10 24 V 40 A Dimensions W H D in mm 70 125 125 150 125 150 Weight approx 1 2 kg approx 3 4 kg ...

Page 17: ...standard mounting rails according to EN 60715 Mounting To mount the device position it with the mounting rail guide at the upper edge of the standard mounting rail and press down to lock it into place If this is too difficult press slider at the same time as described under Removal Removal To remove pull up the slider using a screwdriver and disengage the device at the bottom edge of the standard ...

Page 18: ...h 18 Manual 11 2014 C98130 A7638 A1 2 7629 WARNING Use in hazardous zones If the devices are to be used in hazardous zones Ex II 3G Ex nA nC IIC T4 Gc they must be installed in a distribution box with degree of protection IP54 or higher ...

Page 19: ... input terminals and the output terminals are at the bottom to ensure correct cooling A clearance of at least 50 mm should be maintained above and below the device maximum depth of the cable duct 50 mm No space is required at the side Output current as a function of the ambient temperature and mounting height Figure 4 1 6EP3436 8SB00 0AY0 Output current in the standard mounting position Figure 4 2...

Page 20: ...unting position mounting clearances 4 1 Standard mounting position SITOP PSU8200 3ph 20 Manual 11 2014 C98130 A7638 A1 2 7629 Figure 4 3 Mounting height derating For details see Ambient conditions Page 43 ...

Page 21: ...d in accordance with the following diagrams Note In the case of mounting positions that deviate from the standard mounting position reduced mechanical resistance of the devices against vibration and shock must be expected Particularly when installing on a vertically fastened standard mounting rail additional measures may be required e g to prevent the device from slipping on the standard mounting ...

Page 22: ... 4 2 Other mounting positions SITOP PSU8200 3ph 22 Manual 11 2014 C98130 A7638 A1 2 7629 Figure 4 6 6EP3436 8SB00 0AY0 mounting position 3 Figure 4 7 6EP3436 8SB00 0AY0 mounting position 4 Figure 4 8 6EP3436 8SB00 0AY0 mounting position 5 ...

Page 23: ...2 Other mounting positions SITOP PSU8200 3ph Manual 11 2014 C98130 A7638 A1 2 7629 23 4 2 2 6EP1437 3BA10 Figure 4 9 6EP1437 3BA10 mounting position 1 Figure 4 10 6EP1437 3BA10 mounting position 2 Figure 4 11 6EP1437 3BA10 mounting position 3 ...

Page 24: ... position mounting clearances 4 2 Other mounting positions SITOP PSU8200 3ph 24 Manual 11 2014 C98130 A7638 A1 2 7629 Figure 4 12 6EP1437 3BA10 mounting position 4 Figure 4 13 6EP1437 3BA10 mounting position 5 ...

Page 25: ...igned for connection to a 3 phase AC line supply with a rated voltage of 400 500 V AC 50 60 Hz Figure 5 1 Line supply connection The line supply is connected using terminals L1 L2 L3 and PE see Figure 5 1 Line supply connection Page 25 and must be implemented according to IEC 60364 and EN 50178 A protective device miniature circuit breaker or circuit breaker and a disconnection unit for the power ...

Page 26: ...ercurrent trip 3 A or 3RV2711 1DD10 circuit breaker branch circuit protection according to UL 489 6EP1437 3BA10 24 V 40 A 3 pole coupled miniature circuit breaker IEC 898 characteristic C 10 16 A or 3RV2011 1DA10 circuit breaker setting of the thermal overcurrent trip 3 A or 3RV2711 1DD10 circuit breaker branch circuit protection according to UL 489 The protective conductor of the line supply must...

Page 27: ...ut connection The output voltage is connected via the and terminals at the output of the power supply see Figure 5 2 Output connection Page 27 Ensure that the output cables are dimensioned correctly for the maximum output current rms value and fused accordingly Note If the safety concept of the plant or system specifies that the DC output circuit should be grounded PELV Protected Extra Low Voltage...

Page 28: ...Installation 5 2 Output side connection SITOP PSU8200 3ph 28 Manual 11 2014 C98130 A7638 A1 2 7629 ...

Page 29: ... ms Power failure buffering at Ia rated min 15 ms 15 ms Rated line frequency 50 60 Hz 50 60 Hz Line frequency range 47 63 Hz 47 63 Hz Input current at rated value of input voltage 400 V 1 2 A 2 6 A Input current at rated value of input voltage 500 V 1 A 2 1 A Switch on current limitation 25 C max 18 A 56 A I t max 0 8 A2s 2 24 A2s Integrated input fuse None None Protection in the line feeder cable...

Page 30: ... 20 MHz 200 mV 200 mV Adjustment range 24 28 8 V 24 28 8 V Product function output voltage can be adjusted Yes Yes Output voltage setting Remark Via potentiometer Max 480 W Via potentiometer Max 960 W Operating display LED green for 24 V O K LED green for 24 V O K Signaling Relay contact NO contact rating 60 V DC 0 3 A for 24 V O K Response when switching on off No overshoot of Ua soft start No ov...

Page 31: ...pa bility for a short circuit during opera tion Remark 25 ms per 1 min 25 ms per 1 min Can be connected in parallel to in crease the power rating Remark Yes Switchable characteristic curve with switch A see Figure 2 5 Operating display and signaling Page 12 Number of devices that can be con nected in parallel to increase the power rating units 2 2 Output characteristic See Figure 6 3 Output charac...

Page 32: ...ingle operation output characteristic curve The device supplies a constant output voltage until the current limit is reached In the event of an overload the output current and the output voltage are reduced Selector switch A closed parallel operation The output voltage decreases with increasing output current Figure 6 5 Output characteristic curve 6EP3436 8SB00 0AY0 parallel operation ...

Page 33: ...teristic curve Selector switch B closed latching shutdown The device is shutdown if the overload lasts longer than 100 ms A reset is initiated by switching off the power supply for longer than 5 s Figure 6 7 Output characteristic curve 6EP3436 8SB00 0AY0 latching shutdown Figure 6 8 6EP1437 3BA10 latching shutdown output characteristic curve ...

Page 34: ...00 0AY0 24 V 20 A 6EP1437 3BA10 24 V 40 A Efficiency at Ua rated Ia rated approx 94 92 5 Power loss at Ua rated Ia rated approx 31 W 78 W No load operation power loss approx 3 6 W 7 4 W Power loss in the latching shutdown state 3 6 W 4 7 W Figure 6 9 Efficiency 6EP3436 8SB00 0AY0 Figure 6 10 Efficiency 6EP1437 3BA10 ...

Page 35: ...5 V Current limitation typ 23 A 44 A Property of the output short circuit proof Yes Yes Short circuit protection Optional constant current characteristic curve or latching shutdown Continuous short circuit current rms value typical Comment 23 A Overload capability 150 Ia rated up to 5 s min 44 A Overload capability 150 Ia rated up to 5 s min Overload short circuit display Yellow LED for overload r...

Page 36: ...nely stranded 13 14 signaling contact 1 screw terminal each for 0 14 4 2 5 mm solid finely stranded Width of the housing 70 mm 150 mm Height of the housing 125 mm 125 mm Depth of the housing 125 mm 150 mm Mounting width 71 mm 150 mm Mounting height 225 mm 225 mm Weight approx 1 2 kg 3 4 kg Product feature of the houing housing that can be lined up next to one anoth er Yes Yes Type of mounting pane...

Page 37: ...37 6 9 Dimension drawing See Section Dimensions and weight Page 16 CAD data that can be downloaded from the Internet 6EP3436 8SB00 0AY0 http www automation siemens com bilddb index aspx objKey G_KT01_XX_00969 6EP1437 3BA10 http www automation siemens com bilddb index aspx objKey G_KT01_XX_00363 ...

Page 38: ...Technical data 6 9 Dimension drawing SITOP PSU8200 3ph 38 Manual 11 2014 C98130 A7638 A1 2 7629 ...

Page 39: ...rical isolation SELV output voltage Ua according to EN 60950 1 and EN 50178 SELV output voltage Ua according to EN 60950 1 and EN 50178 Protection class Class I Class I Degree of protection EN 60529 IP20 IP20 Leakage current typ 1 mA 0 4 mA Leakage current max 3 5 mA 3 5 mA Test voltage See Table 7 1 Test voltage for 6EP3436 8SB00 0AY0 Page 40 See Table 7 2 Test voltage for 6EP1437 3BA10 Page 41 ...

Page 40: ...he output terminals signaling contact and PE with one another Test C Connect the output terminals and signaling contact with one another and measure with respect to PE Table 7 1 Test voltage for 6EP3436 8SB00 0AY0 Test time Prim sec A Prim PE B Sec PE C Type test 60 s 4200 VDC 2200 VDC 700 VDC 60 s 3000 VAC 1500 VAC 500 VAC Production test 1 s 4200 VDC 4200 VDC 500 VDC 1 s 3000 VAC 3000 VAC 350 VA...

Page 41: ...time Prim sec A Prim PE B Sec PE C Type test 60 s 4200 VDC 2200 VDC 700 VDC 60 s 3000 VAC 1500 VAC 500 VAC Production test 1 s 2200 VDC 2200 VDC 500 VDC 1 s 1500 VAC 1500 VAC 350 VAC Field test 1 s 2200 VDC 2200 VDC 500 VDC 1 s 1500 VAC 1500 VAC 350 VAC Remark Tripping current for DC measurement 0 mA Tripping current for AC measurement 100 mA ...

Page 42: ...0 0AY0 24 V 20 A 6EP1437 3BA10 24 V 40 A Electrostatic discharge EN 61000 4 2 8 kV contact 8 kV air Electromagnetic fields EN 61000 4 3 80 1000 MHz 25 V m 1000 2700 MHz 10 V m High speed transient disturbance variables burst EN 61000 4 4 4 kV at line supply connections 2 kV at the DC output Surge voltages EN 61000 4 5 3 kV symmetrical at the line connections 6 kV unsymmetrical at the line connecti...

Page 43: ...e tem perature 40 85 C Tests packed for shipping according to EN 60068 2 1 cold EN 60068 2 2 dry heat EN 60068 2 30 humid heat cyclic Humidity class Climatic class 3K3 according to EN 60721 without condensation Climatic class 3K3 according to EN 60721 without condensation Mechanical stressing during operation Tested according to EN 60068 2 6 vibration test Fc 7 mm deflection in the range 5 8 4 Hz ...

Page 44: ...ospheric pressure Operation 1080 795 hPa 1000 2000 m For operation at altitudes of 2000 m up to 6000 m above sea level output must be derated by 7 5 1000 m or the ambient temperature must be reduced by 5 K 1000 m see Figure 4 3 Mounting height derating Page 20 Overvoltage category III to 2000 m EN 50178 II from 2000 m to 6000 m EN 50178 II to 2000 m EN 60950 1 I from 2000 m to 6000 m EN 60950 1 St...

Page 45: ...ted in parallel must be switched on simultaneously with a common switch in the line feeder cable e g with the main switch available in control cabinets The output voltages measured in no load operation for the power supplies that are not yet connected in parallel should not deviate more than a maximum of 50 mV This usually corresponds to the factory setting If the output voltage is changed you sho...

Page 46: ...han two power supplies When connecting more than two power supplies in parallel additional measures must be taken to prevent high backward feeding currents in the event of a secondary device fault For this purpose a suitable protective circuit e g decoupling diode or DC conform circuit breaker must be installed between each terminal of the power supply and the common connection point ...

Page 47: ...lies fails then this is signaled using an LED on the redundancy module as well as an isolated relay contact For higher output current each power supply must be connected to a redundancy module Figure 9 3 Redundant configuration with two power supplies and two SITOP PSE202U redundancy modules Page 47 When dimensioning the system it must be ensured that n 1 redundant connected power supplies can han...

Page 48: ... 9 2 Parallel connection for redundancy SITOP PSU8200 3ph 48 Manual 11 2014 C98130 A7638 A1 2 7629 You can find additional information at SITOP PSE202U manual http support automation siemens com WW view en 42248598 ...

Page 49: ...upply The terminal of the first power supply and the terminal of the second power supply are routed to the load Depending on the grounding point of the secondary output voltages voltages of 48 V 24 V or 48 V can be realized In the case of an asymmetric load distribution it is not possible to guarantee correct functionality WARNING SELV is not guaranteed in the case of a fault When connecting two p...

Page 50: ... output current range for each output from 0 5 3 A and 3 10 A is available for this purpose this monitors the 24 V branches for overload and short circuit Figure 9 5 Electronic protection of 24 V consumers with the SITOP PSE200U selectivity module Page 50 Brief current peaks e g as a result of a high inrush current are permitted and branches with a longer overload are switched into a no current co...

Page 51: ...increase the line buffering time in the device using an additional SITOP PSE201U buffer module The SITOP PSE201U buffer module based on electrolytic capacitors is connected in parallel to the 24 V power supply output Figure 9 6 Buffering brief power failures using the SITOP PSE201U buffer module Page 51 The buffer time is 200 ms at 40 A up to 1 6 s for a load current of 5 A This time can be increa...

Page 52: ...er supply failures up into the minutes range can be buffered using the maintenance free SITOP UPS500 DC UPS modules based on capacitors Figure 9 7 24 V buffering to allow the saving of process data and controlled shutdown of PCs Page 52 Figure 9 7 24 V buffering to allow the saving of process data and controlled shutdown of PCs Using the free of charge SITOP DC UPS software tool DC UPS systems can...

Page 53: ...600 to maintain communication signaling functions sensor measured values and position values For open PC based automation systems configuration and monitoring is realized using the SITOP UPS Manager PC software which is available at no charge This allows PC responses to the operating states of the DC UPS to be freely selected and offers comprehensive diagnostic functions For TIA based automation s...

Page 54: ...Applications 9 6 Protecting against longer power failures SITOP PSU8200 3ph 54 Manual 11 2014 C98130 A7638 A1 2 7629 ...

Page 55: ... Environment 10 The devices are in conformance with RoHS As a rule only non silicon precipitating materials are used Disposal guidelines Packaging and packaging aids can and should always be recycled The product itself may not be disposed of as domestic refuse ...

Page 56: ...Environment SITOP PSU8200 3ph 56 Manual 11 2014 C98130 A7638 A1 2 7629 ...

Page 57: ...lies is available in the Internet at the SITOP homepage SITOP http www siemens de sitop Information material SITOP information can be downloaded from the Internet Information and download center http www siemens de sitop infomaterial CAx data 2D 3D data and circuit diagram macros can be downloaded from the Internet Siemens image database http www siemens de sitop cax Request all CAx data via the C...

Page 58: ... 7629 Contact persons If you have any questions regarding the use of our products then contact the Siemens contact person in your regional Siemens sales office You can find these addresses as follows On the Internet http www siemens de automation partner In Catalog CA 01 ...

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