Q: BMENOC firmware upgrade procedure

Issue: BMENOC firmware upgrade procedure Product Line: BMENOC firmware Resolution: 1/ Use the Unity Loader utility.2/ Connect the PC that is running the Unity Loader to the Ethernet communications module.3/ Launch the Unity Loader.4/ Click the <Firmware> tab.5/ In the PC list box, select the .ldx firmware file.6/ When connected with Ethernet, check that the MAC address indicated in the PLC box corresponds to the MAC address marked on the connected Ethernet device.7/ Check that the transfer sign is green allowing transfer from the PC to the Ethernet module.8/ Click on <Transfer>.9/ Click on <Close> when transfer is complete.NOTE: Make sure that the firmware update security is set to allow firmware updates.-----------The Unity Pro DTM provides security services to the BMENOC0301/11 Ethernet communication module.Enable and disable these services on the Security tab in the Unity Pro DTM.a/ Open the Unity Pro DTM Browser in the Unity Pro M580 project.b/ In the DTM Browser, double click on the BMENOC0301/11 module.c/ Select <Security>d/ Enable or disable (default) these items. Firmware upgrade Device configuration management using the FDR service If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team. If you are not located in North America, please contact your local Customer Care Center for assistance: Support | Schneider Electric Global (se.com)

Q: What is the difference between the REFLEX mode and the POLARISED REFLEX mode on photo-electric sensors?

Note that we no longer sell these devices, this FAQ is for information only. Both systems comprise a transmitter and receiver (usually within a single-body sensor), and a reflector. The transmitter sends a beam which is bounced back by the reflector and detected by the receiver. An object passing through the beam blocks the reflection and triggers the sensing signal.REFLEX mode sensors may not be suitable for detecting reflective objects, as a shiny target may bounce the beam back to the sensor in the same way as the reflector. The sensor may not be able to tell the difference between the target and reflector and will therefore fail to detect the object. For maximum effectiveness the targets should be opaque or near opaque and should not be highly reflective in nature. However, the advantage of reflex mode sensors is that they give relatively long sensing distances.POLARISED REFLEX mode sensors have polarising filters over both the transmitter and receiving sensor. The filters are at 90 deg to each other which means that the receiver cannot see the transmitted beam as it will be blocked by the receiver filter. The reflector turns the polarised light waves through 90 deg so that the receiver can see them. Light bouncing off other objects is not rotated so it will not trigger the sensor. This means that the polarised reflex can be used to detect very reflective surfaces, even mirrors, polished metal and semi transparent materials. However, the sensing distance is shorter than REFLEX.

Q: How can I cable to the PNP and NPN type outputs for sensors / detectors, using the wiring diagram?

PNP and NPN type outputs are available as 3-wire sensors with a DC voltage power supply (the voltage limits are dependent on the specific sensor): PNP type: switching on the positive voltage load NPN type: switching on the negative voltage load These outputs are typical of photoelectric detectors, inductive proximity and other types of sensors.For a detailed explanation of PNP vs NPN, see the following FAQ: FA142566 PNP output The load (relay coil, contactor relay input, PLC input) must be connected between the "-" negative terminal and the midpoint. The corresponding PLC input is Sink. NPN output The load must be connected between the "+" positive terminal and the midpoint. The corresponding PLC input is Source. Some sensors have two PNP and NPN outputs (4-wire sensors) which are wired according to the diagram below.Note that we no longer sell sensors. Telemecanique Sensors, who were previously part of the Schneider Electric brand, were sold in 2023. You can go to their website - www.telemecaniquesensors.com - for more information, including contact details.

Q: What is the selection criterion of Circuit Breakers for the Capacitor bank application.

The selection should be done after derating the Circuit Breaker taking into consideration voltage variation and capacitors tolerances that could increase nominal current up to 1.5In. The Derating factor of 1.5In Where In = Q/ ( Square root of 3 ) Un Q = Capacitor Power Un = Nominal Voltage Choose the Micrologic with delay time selection, so that the Circuit Breaker does not trip due to initial high inrush current. Also to be taken into account are the parameters like supply frequency, operating voltage & harmonics level of the power system for such application. Refer the attached sheet for further details for selection of Circuit Breaker for Capacitor duty application. Note: Use the phase barrier between the phases in Circuit Breaker to prevent flashover due to heavy inrush current.

Q: Why is Neutral and Earth (Ground) Connection forbidden Downstream from Main Panel?

The question is often asked what is the maximum voltage permitted between the Neutral and Earth (Ground) conductor and if the Neutral and Earth can be bridged to achieve a zero value.This can be a difficult topic, in fact in many cases it can be dangerous. As you will see from the attached document, there are many reasons why it is not allowed.

Q: PACTware® - How to update device catalog

There are three ways to access the device Catalog in PACTware®: 1. By clicking on the Device Catalog icon: 2. By going to the View menu and clicking on "Device catalog": 3. By pressing F3 on your keypad. While using any of the methods explained above open the Device Catalog, which will be shown on the right of your PACTware® screen. Click on the Update device catalog button. A message will pop up asking if you want to Create new PACTware® device catalog. Say YES by pressing the Yes button: A new message like the one below will be displayed. WAIT until the process is finished. Once the process is completed the pop-up window will automatically disappear, and the Device catalog database will be now be updated. NOTE: If the DTM you are looking for does not appear in the Device Catalog after updating the database, it may indicate that the DTM for your instrument type has not been installed on your computer. If that is the case, - Download the DTM installer from se.com and unzip it to a local folder in your computer. - Close PACTware (PACTware cannot be running while installing your DTM)- Run the installer as an Admin (right click on the file and click on "run as administrator").Once the DTM is installed, open PACTware and update the Database library with the steps explained in this knowledge article. Questions: Help is available at FieldDevices-Support@se.com

Q: How do you calculate the wear level of TeSys Giga contactor ? By calculating the on/off time ? Why is opening speed better than opening time ?

Contact tips wear rate of is linked to the opening speed and not the opening time. Our algorithm is based on this concept with a dedicated electronic circuit.Arc Voltage is a function of contact separation speed. And Wear Rate is a function of Arc Energy.

Question 1

How do I connect / wire a contactor and overload to create a Direct On Line (DOL) Starter?

Accepted Answer

Attached is a .pdf file with pictorial diagrams (1) of how you would connect the four most common variants of a DOL starter.They show diagrams for 240 and 415 VAC control. The most common for small Direct On-Line Starters (DOLs) is 415VAC, as this requires no neutral to be fed to the starter.Options are also given for using either a remote stop switch or for using the stop button which is integral with the overload. In the latter case the stop button is not a switch, it is a plunger type device fitted into the lid/door of the enclosure, which will physically press the overload stop. This is the method that is used in the Schneider Electric TeSys enclosed motor starters, such as the TeSys LE range.Remote and Emergency stops(2) are shown fitted between terminals A2 and 96, though they can also be fitted between 14 and 95, or even both if multiple stops are involved.WarningParticular care must be taken to accurately fit the stop button when using the plunger type stop without any additional remote stop, as if for any reason the plunger does not activate the stop button on the overload, there will be no way of stopping the motor without disconnecting the supply.NOTES:(1) These drawings are functional schematics. It remains the responsibility of the installer to ensure that the requirements of local directives and legislation are met and that appropriate circuit protection is provided.(2) Inclusion of E stops in these circuits is purely for illustrative purposes and may be acceptable in simple relatively low risk safety systems. However, depending on the risk assessment carried out on the plant it may not be appropriate, other Emergency Stop facilities may be necessary, particularly in high risk applications. Consult you safety consultant.NOTE regarding Terminal NumberingThe circuits are based upon TeSys D range contactors and overloads. Terminal numbering is to a common standard so most other contactors can be wired similarly. However, be aware that there are contactors that use different numbering systems.NOTE if using TeSys KThe TeSys LR2K overloads (LR2K****) for use with TeSys K range contactors (LC1K****) have additional pins on their overloads to make direct connection to terminals 14 on contactor to 95 on overload and A2 on contactor to 96 on overload. The diagrams provided in the attached PDF file do not relate to such TeSys K systems unless the 2 right hand pins are first removed. These pins are specially weakened for this purpose and may easily be snapped off by bending backwards with a pair of pliers as shown for one pin on the diagram belowHowever, doing this is just making extra work. It is better to wire in accordance with the K Series diagram.

Question 2

What are the separate parts required to build up star delta starters for motors 7.5kW through to 132kW suitable for mounting on DIN rail?

Accepted Answer

The table below indicates the selection of the power switching components necessary to build up a star delta starters, with mechanical interlocks between star and delta contactors, suitable for mounting on DIN rail in a suitable control panel.Notes: In some cases, the starter can be supplied assembled (prefix LC3) with the overload relay supplied separately. These should be checked on a case-by-case basis, as some are obsolete.Overload selection is based on the motor full load current (FLC) x 0.58 due to the mounting position in the 'delta loop'.In the case of 110 and 132 kW there is a requirement for a separate control relay and timer to ensure sufficient delay in the changeover time from star to delta contactor. Motor FLC against power at 415V AC based on average typical motors Complete Starters (Including Interlock) Star Delta Starter components for customer assembly Note: Star Delta Kit includes timer, power connections and mechanical interlock Overload Selection kW at 415V AC Motor FLC (A) Starter Plate Mounted Line Contactor Delta Contactor Star Contactor Star Delta Kit Overload current (A) (FLC * 0.58) Overload Class 10A (Adjustment range shown in brackets) 7.5 14 LC3D09A•• LC1D09*** LC1D09*** LC1D09*** LAD91217 8 LRD14 (7-10A) 11 21 LC3D12A•• LC1D18*** LC1D12*** LC1D09*** LAD91217 12 LRD16 (9-13A) 22 40 LC3D18A•• LC1D25*** LC1D25*** LC1D09*** LAD93217 23 LRD22 (16-24A) 30 55 LC3D32A•• LC1D32*** LC1D32*** LC1D18*** LAD93217 32 LRD35 (30-38A) 37 66 Not Available LC1D40A*** LC1D40A*** LC1D40A*** LAD9SD3 38 LRD340 (30-40A) 55 100 Not Available LC1D50A*** LC1D50A*** LC1D40A*** LAD9SD3 58 LRD365 (48-65A) 75 135 LC3D80••A64 LC1D80** LC1D80** LC1D80** LA9D8018 78 LRD3363 (63-80A) 110 200 LC3D115••A64 LC1D115A*** LC1D115A*** LC1D115A*** LAD9150SD19 busbars LAD5CM interlock LADT2 timer LADN11 aux for star contactor CAD32•• control relay 116 LRD4367 (95-120A) 132 240 Not Available LC1D150A*** LC1D150A*** LC1D150A*** 139 LRD4369 (110-140A) Replace *** with the following codes for coil voltage: BNE - 24-60V AC/DCEHE - 48-130V AC/DCKUE - 100-250V AC/DCLSE - 200-500V AC/DC (Only for LC1D115A & LC1D150A - For 415V AC on other contactors use 'N7') Replace •• with the following codes for coil voltage: B7 - 24V ACF7 - 110V ACP7 - 230V ACU7 - 240V ACN7 - 415V AC There is a link below to our Coordination & Standards guide, this contains various Type 1 and Type 2 coordination tables for both star delta & direct online (DOL) starters along with other information on selecting contactors for various uses. TeSys - Chapter A5 - Circuit breaker + contactor coordination tables and design guidelines - Digicat | Schneider Electric The below drawing is an example of how a star delta starter power circuit and control circuit could look:

Question 3

What are the causes SCF1 Short circuit fault on an Altivar ATV320 variable speed drive?

Accepted Answer

Issue:Getting SCF1 fault on an ATV320.Product Line:Altivar 320Environment:AllCause:Motor short circuitResolution:SCF1 is a short-circuit event.Except for a real short circuit event at the Alivar drive output (motor, motor cables) , the SCF1 can have another reason:- high magnetizing current (motor saturated),- low motor inductance (real vs measured),- lack of symmetry in the motor circuit,- motor cabling issue, or- the motor itself.The best way is to record scope (fast scope) with variables LCR (motor current, filtered), SLCR (motor current, non-filtered), RFR (motor speed) to see the moment when SCF1 occurs. Auto-tuning data can affect the occurrence of SCF1.Try to lower LFA parameter a little and record the same Somove scope again (fast scope, sampling time 10 ms or faster if it reveals any anomalies) . Compare the results at different LFA. It is recommended to apply the same load cycle to find relevant comparisons.Also, Check if the magnetizing current IDA measured by the Altivar corresponds to a reasonable value. (In * sqrt (1-(cos phi)^2)Try different motor control laws.Change switching frequency, sometimes it helps when increasing SFR, sometimes when decreasing.Think about adding a motor choke as this choke can reduce ripples in motor current and so higher probability that SCF1 threshold will not be exceeded.For those that cannot find IDA, LFA parameters, or do not have manuals, a picture from Somove in the attachment

Question 4

How to give an address to variables that are part of an structure in EcoStruxure Machine Expert?

Accepted Answer

Issue: This FAQ provides an alternative for assigning addresses to variables that are part of a structure in EcoStruxure Machine Expert, as this process is not intuitive. Additionally, this FAQ includes an example illustrating the relationship between different memory types (e.g., %MLx, %MBx, %MWx, %MDx, %MXx). This information is useful when using the Modbus TCP protocol to read tags from an M241, M251, or M262 controller and share them with another device (e.g., SCADA, HMI, PLC). Product: EcoStruxure Machine Expert (previously SoMachine) Environment: PLC Configuration Software in Windows Resolution: When using Modbus TCP, you must assign an address to the variables. If you are working with structures, follow the steps below: a. Create a structure and calculate its size in bytes. b. In Machine Expert, use %MLx to address structures. This memory type occupies 8 bytes. Depending on the structure size, you must leave enough space between instances to avoid overlap (unfortunately, this must be done manually). In this example: %ML0 starts at %MB0 (Memory Byte).%ML3 starts at %MB24. This spacing ensures all tags fit properly. c. Create a tag for each element of the structure instance and assign an address using %MWx (INT/WORD), %MXx (BOOL/Bit), or %MDx (REAL), depending on the data type. d. Validation. In this example: a. Structure GateOC is create that consist of 17 bytes. Note: 6 INT (2 bytes each) + 2 BOOL (1 bit each, so 1 byte is required) + 1 REAL (4 bytes) = 17 bytes b. Create each structure instance and assign it a %MLx address, leaving enough space to prevent overlapping. c. Create a set of tags for each instance, in the picture below a set of tags was created for instance CokRecLg1TpGt. Note: Not all tags use %MWx, but the comments show the relationship between %MXx and %MDx with the %MWx memory type. d. Validation. Each color represents a different case, and in the end, everything aligns. Yellow is consistent across all three representations, as are sky blue and purple. For the REAL tag: WORD 1 = 33,554 (lower 16 bits) WORD 2 = 16,288 (upper 16 bits) REAL ≈ 1.254 Unfortunately, this is the only way to assign addresses to tags inside a structure in Machine Expert. It is a manual process, and you must maintain proper order to ensure tags do not overlap

Question 5

Video: How to install MN undervoltage release in Compact NSXm or PowerPact B Multistandard?

Accepted Answer

The video attached below shows the different steps to install MN undervoltage release in Compact NSXm or PowerPact B Multistandard.

Question 6

What is Eddy Current and its influence in PrismaSeT I Switchboard

Accepted Answer

!!!Confidential Content What is Eddy current? Eddy currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor, due to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor. The magnitude of the current in a given loop is proportional to the strength of the magnetic field, the area of the loop, and the rate of change of flux, and inversely proportional to the resistivity of the material. By Lenz's law, an eddy current creates a magnetic field that opposes the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field. For example, a nearby conductive surface will exert a drag force on a moving magnet that opposes its motion, due to eddy currents induced in the surface by the moving magnetic field. This effect is employed in eddy current brakes which are used to stop rotating power tools quickly when they are turned off. The current flowing through the resistance of the conductor also dissipates energy as heat in the material. Thus eddy currents are a cause of energy loss in alternating current (AC) inductors, transformers, electric motors and generators, and other AC machinery, requiring special construction such as laminated magnetic cores or ferrite cores to minimize them. When does Eddy current become significant?Eddy current is not significant below 630 A. The IEC 61439-1 says that for more than 630 A Eddy current will be present and design has to ensure that additional thermal effects relating to the eddy currents and current displacement are considered in design (IEC 61439-1 : 2011, Sec. 10.10.2.2.3-b). How is the effect of Eddy current managed in PrismaSeT I?Induced Eddy current also depends on the design as explained below Fig 1 shows a single phase electrical conductor which is passing through a metallic plate. This will induce a magnetic field in the plate as shown in the figure and it will cause eddy current.Fig 2 shows the 3 phase electrical conductors which are passing through a common cut out in a metallic plate. In this case, there will not be any magnetic field induced in the metallic plate as vector summation of the magnetic fields induced by each phase will become zero.Fig 3 shows PrismaSeT International busbar architecture which is similar to the configuration of Fig 2. Hence, ideally there can not be any Eddy current induced in the supports.Fig 4 shows cutouts in PrismaSeT International form partitions when rated current is more than 630 A which is similar to Fig 2. Hence, ideally there can not be any Eddy current induced. There are no defined limits by the standards for Eddy Current. But, by design there cannot be any high eddy current in PrismaSeT I. The entire PrismaSeT I offer is type tested for temperature rise as per IEC 61439-1. Hence, it is not required to be worried unless and until there is an excessive temperature rise. Induced Magnetic Fields Arrangement in PrismaSeT IHow does aluminum help to reduce Eddy current in PrismaSeT I for Gland Plate and Busbar Support instead of steel ? Normally for steel, two types of magnetic losses occur, Eddy Current Loss and Hysteresis loss. As aluminum is a nonmagnetic material, Hysteresis loss does not occur and the induced eddy current is normally less compared to steel. Hence, when the rated current is more than 630 A and it is not possible to implement design as Fig. 2, aluminum sheet can be used in PrismaSeT I to minimize Eddy current effect (For example, cable gland plate).

Question 7

How do you configure logging data to a CSV file in EcoStruxure Machine Expert?

Accepted Answer

IssueHow do you configure logging data from a Symbol to a CSV file in a EcoStruxure Machine Expert PLC like M241, M251 or M262?Product LineEcoStruxure Machine ExpertModicon M241, M251, M262 Programmable Logic ControllersEnvironmentPLC Configuration Software - Logic BuilderResolutionTo configure logging data to file in EcoStruxure Machine Expert, follow these steps:1) In Logic Builder of your project, go to the Tools tree2) Right-click on the Application node of your PLC3) Add a DataLogManager node. This will automatically add the SE_DataLogging library to the Library Manager of this controller4) Under the DataLogManager node, add a LogFile node. The name that is assigned to this node will be the filename of the log file (e.g. "MyLogFile.log"). In this node, you can choose the storage location (Internal Flash or SD Card), add date and time stamps, choose the maximum entries in the file, choose to use a circular buffer or not, and use a deliminating character for CSV format.5) In a POU subroutine, add the LogRecord function block from the SE_DataLogging library6) Name it the same as the LogFile node's name (MyLogFile)7) Add a LogRecord.Dump, again with the same instance name (MyLogFile)8) Tie the xDone output pin of the LogRecord block to the xExecute input pin of LogRecord.Dump9) Assign the variable that you wish to log to the wsRecord input pin of the LogRecord block.Note that an Integer or Floating point value must be converted to WSTRING type to be logged. This can be done with an INT_TO_WSTRING or REAL_TO_WSTRING conversion operator, for example, respectively.10) A rising edge to the xExecute input pin of the LogRecord block will cause the file to be written to.The file can be accessed by the following steps:1) Log in to the PLC2) From the Devices Tree, double-click on the name of the Controller (MyController by default)3) Go to the Files tab4) On the right-pane, click the refresh button (spinning green arrows icon)5) Open the "Log" folder from the PLC. There, you will see the log file.6) On the left pane, select a destination folder on your PC7) Click the [<<] button to move the file to your PC. This file can be renamed and opened as CSV in Excel for example.For more information, please see EcoStruxure Machine Expert - Data Logging Functions - DataLogging Library Guide If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions: Frequently Asked Questions - Schneider Electric (se.com) If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team. If you are not located in North America, please contact your local Customer Care Center for assistance: Support | Schneider Electric Global (se.com)

Question 8

BMENOC firmware upgrade procedure

Accepted Answer

Issue: BMENOC firmware upgrade procedure Product Line: BMENOC firmware Resolution: 1/ Use the Unity Loader utility.2/ Connect the PC that is running the Unity Loader to the Ethernet communications module.3/ Launch the Unity Loader.4/ Click the tab.5/ In the PC list box, select the .ldx firmware file.6/ When connected with Ethernet, check that the MAC address indicated in the PLC box corresponds to the MAC address marked on the connected Ethernet device.7/ Check that the transfer sign is green allowing transfer from the PC to the Ethernet module.8/ Click on .9/ Click on when transfer is complete.NOTE: Make sure that the firmware update security is set to allow firmware updates.-----------The Unity Pro DTM provides security services to the BMENOC0301/11 Ethernet communication module.Enable and disable these services on the Security tab in the Unity Pro DTM.a/ Open the Unity Pro DTM Browser in the Unity Pro M580 project.b/ In the DTM Browser, double click on the BMENOC0301/11 module.c/ Select d/ Enable or disable (default) these items. Firmware upgrade Device configuration management using the FDR service If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team. If you are not located in North America, please contact your local Customer Care Center for assistance: Support | Schneider Electric Global (se.com)

Question 9

What does light or dark switching mean when referring to photo electric sensors?

Accepted Answer

Please note - As of 01/09/23 the Telemecanique Sensors range is no longer part of Schneider Electric. This FAQ is now for reference only. For further information and contact details for Telemecanique Sensors, please visit their website; https://www.telemecaniquesensors.com/uk/en There are 3 main types of photo electric sensor used for detecting an object; Diffuse (sometimes also called proximity mode or direct detection). There is also a variation of diffuse called diffuse with background suppression (diffuse with BGS).Retro reflective (sometimes also called reflex). There is also a variation of reflex called polarised reflex (or polarised retro reflective). Through beam (sometimes also called thru' beam). Determining normally open (N/O) or normally closed (N/C) operation? Both the retro reflective and through beam sensors rely on the object 'breaking' the beam in order for it to be detected. Whereas the diffuse system requires the object itself to reflect the light beam.Because of this fundamental difference in the way the sensors detect an object, retro reflective and through beam sensor outputs are the inverse of diffuse sensors. This leads to a lot of confusion. Historically Within the photo electric industry, to overcome the confusion of referring to N/O or N/C outputs, the term 'light switching' and 'dark switching' was introduced; Light switching; A sensor that is light switching switches it's output 'on' when the light beam is returned to the receiver. i.e. If N/O operation is required, a light switching diffuse sensor could be used. Dark switching; A sensor that is dark switching switches it's output 'on' when the light beam blocked from returning the beam to the receiver. i.e. If N/O operation is required, a dark switching retro reflective or through beam sensor could be used. Recent developments To simplify product selection, Schneider Electric (under the Telemecanique brand) pioneered the concept (launched as Osiconcept) of 'object detection' with it's Osiris multimode range of sensors. With these products, irrespective of whether the sensor is configured for retro reflective, through beam or diffuse the output will default to N/O. Another feature of these multimode sensors is the ability to invert the output to achieve a N/C mode of operation.

Question 10

What is the difference between the REFLEX mode and the POLARISED REFLEX mode on photo-electric sensors?

Accepted Answer

Note that we no longer sell these devices, this FAQ is for information only. Both systems comprise a transmitter and receiver (usually within a single-body sensor), and a reflector. The transmitter sends a beam which is bounced back by the reflector and detected by the receiver. An object passing through the beam blocks the reflection and triggers the sensing signal.REFLEX mode sensors may not be suitable for detecting reflective objects, as a shiny target may bounce the beam back to the sensor in the same way as the reflector. The sensor may not be able to tell the difference between the target and reflector and will therefore fail to detect the object. For maximum effectiveness the targets should be opaque or near opaque and should not be highly reflective in nature. However, the advantage of reflex mode sensors is that they give relatively long sensing distances.POLARISED REFLEX mode sensors have polarising filters over both the transmitter and receiving sensor. The filters are at 90 deg to each other which means that the receiver cannot see the transmitted beam as it will be blocked by the receiver filter. The reflector turns the polarised light waves through 90 deg so that the receiver can see them. Light bouncing off other objects is not rotated so it will not trigger the sensor. This means that the polarised reflex can be used to detect very reflective surfaces, even mirrors, polished metal and semi transparent materials. However, the sensing distance is shorter than REFLEX.

Question 11

How can I cable to the PNP and NPN type outputs for sensors / detectors, using the wiring diagram?

Accepted Answer

PNP and NPN type outputs are available as 3-wire sensors with a DC voltage power supply (the voltage limits are dependent on the specific sensor): PNP type: switching on the positive voltage load NPN type: switching on the negative voltage load These outputs are typical of photoelectric detectors, inductive proximity and other types of sensors.For a detailed explanation of PNP vs NPN, see the following FAQ: FA142566 PNP output The load (relay coil, contactor relay input, PLC input) must be connected between the "-" negative terminal and the midpoint. The corresponding PLC input is Sink. NPN output The load must be connected between the "+" positive terminal and the midpoint. The corresponding PLC input is Source. Some sensors have two PNP and NPN outputs (4-wire sensors) which are wired according to the diagram below.Note that we no longer sell sensors. Telemecanique Sensors, who were previously part of the Schneider Electric brand, were sold in 2023. You can go to their website - www.telemecaniquesensors.com - for more information, including contact details.

Question 12

What is the selection criterion of Circuit Breakers for the Capacitor bank application.

Accepted Answer

The selection should be done after derating the Circuit Breaker taking into consideration voltage variation and capacitors tolerances that could increase nominal current up to 1.5In. The Derating factor of 1.5In Where In = Q/ ( Square root of 3 ) Un Q = Capacitor Power Un = Nominal Voltage Choose the Micrologic with delay time selection, so that the Circuit Breaker does not trip due to initial high inrush current. Also to be taken into account are the parameters like supply frequency, operating voltage & harmonics level of the power system for such application. Refer the attached sheet for further details for selection of Circuit Breaker for Capacitor duty application. Note: Use the phase barrier between the phases in Circuit Breaker to prevent flashover due to heavy inrush current.

Question 13

Why is Neutral and Earth (Ground) Connection forbidden Downstream from Main Panel?

Accepted Answer

The question is often asked what is the maximum voltage permitted between the Neutral and Earth (Ground) conductor and if the Neutral and Earth can be bridged to achieve a zero value.This can be a difficult topic, in fact in many cases it can be dangerous. As you will see from the attached document, there are many reasons why it is not allowed.

Question 14

PACTware® - How to update device catalog

Accepted Answer

There are three ways to access the device Catalog in PACTware®: 1. By clicking on the Device Catalog icon: 2. By going to the View menu and clicking on "Device catalog": 3. By pressing F3 on your keypad. While using any of the methods explained above open the Device Catalog, which will be shown on the right of your PACTware® screen. Click on the Update device catalog button. A message will pop up asking if you want to Create new PACTware® device catalog. Say YES by pressing the Yes button: A new message like the one below will be displayed. WAIT until the process is finished. Once the process is completed the pop-up window will automatically disappear, and the Device catalog database will be now be updated. NOTE: If the DTM you are looking for does not appear in the Device Catalog after updating the database, it may indicate that the DTM for your instrument type has not been installed on your computer. If that is the case, - Download the DTM installer from se.com and unzip it to a local folder in your computer. - Close PACTware (PACTware cannot be running while installing your DTM)- Run the installer as an Admin (right click on the file and click on "run as administrator").Once the DTM is installed, open PACTware and update the Database library with the steps explained in this knowledge article. Questions: Help is available at FieldDevices-Support@se.com

Question 15

How do you calculate the wear level of TeSys Giga contactor ? By calculating the on/off time ? Why is opening speed better than opening time ?

Accepted Answer

Contact tips wear rate of is linked to the opening speed and not the opening time. Our algorithm is based on this concept with a dedicated electronic circuit.Arc Voltage is a function of contact separation speed. And Wear Rate is a function of Arc Energy.

Question 16

What are the differences between snap-action and slow-break contacts in limit switches?

Accepted Answer

Note we no longer sell limit switches so the information given below is for information purposes only. You may still be able to buy Telemecanique limit switches (and some 9007 etc. ex-Schneider Electric ranges) but you'd need to go to them directly. This is their website for contact details and product information: www.telemecaniquesensors.com Snap actionThe speed of travel of snap-action contacts is not related to the speed of operation of the actuator. The actuator pretensions an "overcentre spring" mechanism and it is the spring tension which operates the contact once a certain tension has been achieved. This results in a very fast and assured operation of the contacts as the spring mechanisms "flicks" (or "snaps") over the trigger point and latches the contacts on. A similar action takes place on the release, i.e. as the actuator is released the spring tension reduces but the contacts do not move until the tension has dropped below a certain level, when the spring mechanism will snap the contacts open again.Slow BreakA "slow break contact" is one where the physical movement of the actuator is directly linked to the physical movement of the contact. This can give very precise positioning and synchronization of both make and break points but is susceptible to arcing and intermittent signalling at the crucial make/break position, where actuator movement is slow and/or erratic.Main differences between Snap Action and Slow BreakThe snap action contact mechanism inevitably creates a hysteresis effect, where the closing and opening of the switch have considerable overlap. Please see attached timing diagram example. This does not occur with slow break, as the movement of the contacts is directly linked to the movement of the switch / object.Slow break have a higher minimum actuation speed, to overcome the effect of sustain arcing on the contacts. Note that for applications that cause the switch to open a little and then re-close repeatedly / rapidly, this can reduce electrical durability over time.Both types commonly have positive opening N/C contacts (always check your switch to confirm), but snap action provide an assured signal at slower speeds, whereas slow break rely on the minimum actuation speed. This is why there is potential for intermittent signalling on slow break, if that minimum speed is not adhered to.Slow break can often switch bigger loads and offer higher electrical reliability values compared to snap action but please check product tables / data to confirm this on a case-by-case basis.Sequence of moving contactsTiming Sequence for "Snap Action". Note overlap of switching positions for different directions of travel.Timing sequence for "Slow Break". Note same position for make and break.

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