Current Transducer HO-NSM series I = 8, 15, 25 A P N Ref: HO 8-NSM, HO 15-NSM, HO 25-NSM For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Applications ● Hall effect measuring principle ● AC variable speed drives ● Multirange current transducer through PCB ● Static converters for DC motor drives pattern lay-out ● Battery supplied applications ● Galvanic separation between primary and secondary circuit ● Uninterruptible Power Supplies (UPS) ● Insulated test voltage 4300 V ● Switched Mode Power Supplies (SMPS) ● Low power consumption ● Power supplies for welding applications ● Extremely low profile 12 mm ● The solar inverter on DC side of the inverter (MPPT) ● Single power supply +5 V ● Combiner box. ● Fixed offset & sensitivity ● Overcurrent detection 2.63 × I (peak value) Standards P N ● Memory check. ● EN 50178: 1997 ● IEC 61010-1: 2010 Advantages ● IEC 61326-1: 2012 ● Small size and space saving ● UL 508: 2010. ● Only one design for wide primary current range ● High immunity to external interference Application Domain ● 8 mm creepage/clearance ● Industrial. ● High insulation capability ● Fast response. N° 74.52.11.000.0, N° 74.52.15.000.0, N° 74.52.19.000.0 Page 1/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Absolute maximum ratings Parameter Symbol Unit Value Maximum supply voltage (not operating) U V 6.5 C max Maximum primary conductor temperature T °C 120 B max Electrostatic discharge voltage (HBM - Human Body Model) U kV 2 ESD HBM Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. UL 508: Ratings and assumptions of certification File # E189713 Volume: 2 Section: 5 Standards ● CSA C22.2 NO. 14-10 INDUSTRIAL CONTROL EQUIPMENT - Edition 11 ● UL 508 STANDARD FOR INDUSTRIAL CONTROL EQUIPMENT - Edition 17 Ratings Parameter Unit Value Primary potential involved 1) V AC/DC 1000 Maximum surrounding air temperature °C 105 Primary current A According to series primary currents Transducer supply voltage V DC 0 ... 5 Output voltage V 0 ... 5 Note: 1) Primary potential involved is 600 V AC/DC according to Canadian Standard CSA C22.2. Conditions of acceptability When installed in the end-use equipment, consideration shall be given to the following: 1 - These devices have been evaluated for overvoltage category III and for use in pollution degree 2 environment. 2 - A suitable enclosure shall be provided in the end-use application. 3 - The terminals have not been evaluated for field wiring. 4 - These devices have been evaluated for use in 105 °C maximum surrounding air temperature. 5 - The secondary (Sensing) circuit is intended to be supplied by an Isolated Secondary Circuit - Limited voltage circuit defined by UL 508 paragraph 32.5. The maximum open circuit voltage potential available to the circuit and overcurrent protection shall be evaluated in the end use application. 6 - T hese devices are intended to be mounted on a printed wiring board of end-use equipment. The suitability of the connections (including spacings) shall be determined in the end-use application. 7 - Primary terminals shall not be straightened since assembly of housing case depends upon bending of the terminals. 8 - Any surface of polymeric housing have not been evaluated as insulating barrier. 9 - L ow voltage circuits are intended to be powered by a circuit derived from an isolating source (such as a transformer, optical isolator, limiting impedance or electro-mechanical relay) and having no direct connection back to the primary circuit (other than through the grounding means). Marking Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL’s Follow-Up Service. Always look for the Mark on the product. Page 2/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Insulation coordination Parameter Symbol Unit Value Comment RMS voltage for AC insulation test, 50/60 Hz, 1 min U kV 4.3 d Impulse withstand voltage 1.2/50 μs U kV 8 Ni Partial discharge extinction RMS voltage @ 10 pC U V 1650 e Clearance (pri. - sec.) d mm 8 Shortest distance through air CI Creepage distance (pri. - sec.) d mm 8 Shortest path along device body Cp Case material - - V0 According to UL 94 Comparative tracking index CTI 600 Reinforced insulation, Application example V 600 CAT III, PD 2, non uniform field according to EN 50178 Reinforced insulation, Application example V 300 CAT III, PD 2, non uniform field according to IEC 61010 Basic insulation, CAT III, PD 2, non uniform field Application example V 1000 according to EN 50178, IEC 61010 Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Comment Ambient operating temperature T °C −40 105 A Ambient storage temperature T °C −40 105 S Surrounding temperature according to UL 508 °C 105 Mass m g 5 Page 3/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Electrical data HO 8-NSM-0000 At T = 25 °C, U = +5 V, N = 1 turn, R = 10 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). A C P L Parameter Symbol Unit Min Typ Max Comment Primary nominal RMS current I At 8 P N Primary current, measuring range I At −20 20 P M Number of primary turns N 1,2,3 P Supply voltage U V 4.5 5 5.5 C Current consumption I mA 19 25 C Reference voltage V V 2.475 2.5 2.525 Internal reference ref External reference voltage V V 0.5 2.65 ref Output voltage range @ I V − V V −2 2 P M out ref Output voltage @ I = 0 A V V V + V P out ref O E Electrical offset voltage V mV −7 7 O E −20 °C ... 85 °C ±160 Internal reference Temperature coefficient of V TCV ppm/K ref ref −40 °C ... 105 °C ±190 Internal reference ±0.088 −20 °C ... 85 °C Temperature coefficient of V TCV mV/K O E O E ±0.095 −40 °C ... 105 °C Theoretical sensitivity G mV/A 100 800 mV/ I @ U = 5 V th P N C Sensitivity error ε % ±0.5 Factory adjustment G ±200 −40 °C ... 85 °C Temperature coefficient of G TCG ppm/K ±220 −40 °C ... 105 °C Linearity error 0 ... I ε % of I ±0.5 @ U = 5 V P N L P N C Linearity error 0 ... I ε % of I ±0.8 @ U = 5 V P M L P M C Sensitivity error with respect to U ±10 % ε %/% ±0.05 Sensitivity error per U drift C G C Magnetic offset voltage V mV ±6 @ I = 0 after an overload of 2.5 × I O M P P N Reaction time @ 10 % of I t µs 2 di/dt = I /µs P N ra P N Step response time to 90 % of I t µs 3.5 di/dt = I /µs P N r P N Frequency bandwidth (−3 dB) BW kHz 250 Output noise voltage spectral density e µV/√Hz 32.9 @ U = 5 V (DC ... 100 kHz) no C Output RMS noise voltage V mVpp 80 (DC ... 20 MHz) no Standby pin “0” level V 0.3 Standby pin “1” level V U −0.3 C Time to switch from standby to normal mode µs 20 Primary current, detection threshold I A 2.6 × I 2.9 × I 3.2 × I peak value P Th P N P N P N Accuracy @ I X % of I ±1 = ε +ε P N P N G L Accuracy @ I @ T = +85 °C X % of I ±2.9 See formula note 1) P N A P N Accuracy @ I @ T = +105 °C X % of I ±3.8 See formula note 1) P N A P N Note: 1) Accuracy @ I and T = ± [X + (TCG/10000) · (T − 25) + TCV · 100 · (T − 25) / (G · I )]. P A A O E A th P Page 4/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Electrical data HO 15-NSM-0000 At T = 25 °C, U = +5 V, N = 1 turn, R = 10 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). A C P L Parameter Symbol Unit Min Typ Max Comment Primary nominal RMS current I At 15 P N Primary current, measuring range I At −37.5 37.5 P M Number of primary turns N 1,2,3 P Supply voltage U V 4.5 5 5.5 C Current consumption I mA 19 25 C Reference voltage V V 2.475 2.5 2.525 Internal reference ref External reference voltage V V 0.5 2.65 ref Output voltage range @ I V − V V −2 2 P M out ref Output voltage @ I = 0 A V V V + V P out ref O E Electrical offset voltage V mV −5 5 O E −20 °C ... 85 °C ±160 Internal reference Temperature coefficient of V TCV ppm/K ref ref −40 °C ... 105 °C ±190 Internal reference Temperature coefficient of V TCV mV/K ±0.075 O E O E Theoretical sensitivity G mV/A 53.33 800 mV/ I @ U = 5 V th P N C Sensitivity error ε % ±0.5 Factory adjustment G Temperature coefficient of G TCG ppm/K ±200 Linearity error 0 ... I ε % of I ±0.5 @ U = 5 V P N L P N C Linearity error 0 ... I ε % of I ±0.8 @ U = 5 V P M L P M C Sensitivity error with respect to U ±10 % ε %/% ±0.05 Sensitivity error per U drift C G C Magnetic offset voltage V mV ±6 @ I = 0 after an overload of 2.5 × I O M P P N Reaction time @ 10 % of I t µs 2 di/dt = I /µs P N ra P N Step response time to 90 % of I t µs 3.5 di/dt = I /µs P N r P N Frequency bandwidth (−3 dB) BW kHz 250 Output noise voltage spectral density e µV/√Hz 17.5 (DC ... 100 kHz) no Output RMS noise voltage V mVpp 50 (DC ... 20 MHz) no Standby pin “0” level V 0.3 Standby pin “1” level V U −0.3 C Time to switch from standby to normal mode µs 20 Primary current, detection threshold I A 2.6 × I 2.9 × I 3.2 × I peak value P Th P N P N P N Accuracy @ I X % of I ±1 = ε +ε P N P N G L Accuracy @ I @ T = +85 °C X % of I ±2.8 See formula note 1) P N A P N Accuracy @ I @ T = +105 °C X % of I ±3.4 See formula note 1) P N A P N Note: 1) Accuracy @ I and T = ± [X + (TCG/10000) · (T − 25) + TCV · 100 · (T − 25) / (G · I )]. P A A O E A th P Page 5/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Electrical data HO 25-NSM-0000 At T = 25 °C, U = +5 V, N = 1 turn, R = 10 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). A C P L Parameter Symbol Unit Min Typ Max Comment Primary nominal RMS current I At 25 P N Primary current, measuring range I At −62.5 62.5 P M Number of primary turns N 1,2,3 P Supply voltage U V 4.5 5 5.5 C Current consumption I mA 19 25 C Reference voltage V V 2.475 2.5 2.525 Internal reference ref External reference voltage V V 0.5 2.65 ref Output voltage range @ I V − V V −2 2 P M out ref Output voltage @ I = 0 A V V V + V P out ref O E Electrical offset voltage V mV −5 5 O E −20 °C ... 85 °C ±160 Internal reference Temperature coefficient of V TCV ppm/K ref ref −40 °C ... 105 °C ±190 Internal reference Temperature coefficient of V TCV mV/K ±0.075 O E O E Theoretical sensitivity G mV/A 32 800 mV/ I @ U = 5 V th P N C Sensitivity error ε % ±0.5 Factory adjustment G Temperature coefficient of G TCG ppm/K ±200 Linearity error 0 ... I ε % of I ±0.5 @ U = 3.3 V P N L P N C Linearity error 0 ... I ε % of I ±0.8 @ U = 3.3 V P M L P M C Sensitivity error with respect to U ±10 % ε %/% ±0.05 Sensitivity error per U drift C G C Magnetic offset voltage V mV ±6 @ I = 0 after an overload of 2.5 × I O M P P N Reaction time @ 10 % of I t µs 2 di/dt = I /µs P N ra P N Step response time to 90 % of I t µs 3.5 di/dt = I /µs P N r P N Frequency bandwidth (−3 dB) BW kHz 250 Output noise voltage spectral density e µV/√Hz 10.5 (DC ... 100 kHz) no Output RMS noise voltage V mVpp 30 (DC ... 20 MHz) no Standby pin “0” level V 0.3 Standby pin “1” level V U −0.3 C Time to switch from standby to normal mode µs 20 Primary current, detection threshold I A 2.6 × I 2.9 × I 3.2 × I peak value P Th P N P N P N Accuracy @ I X % of I ±1 = ε +ε P N P N G L Accuracy @ I @ T = +85 °C X % of I ±3.3 See formula note 1) P N A P N Accuracy @ I @ T = +105 °C X % of I ±4.1 See formula note 1) P N A P N Note: 1) Accuracy @ I and T = ± [X + (TCG/10000) · (T − 25) + TCV · 100 · (T − 25) / (G · I )]. P A A O E A th P Page 6/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Typical performance characteristics I = 8 A P N Linearity error HO 8-NP Frequency characteristics 0.5 Gain [0 dB at 50 Hz] Spec Phase 0.4 6.0 180 0.3 Linearity error (%)--0000....12210 n [0 dB at 50 Hz] -0242....0000 -06160200 Phase [deg] -0.3 ai G -4.0 -120 -0.4 -0.5 -6.0 -180 -10 -8 -6 -4 -2 0 2 4 6 8 10 10 100 1000 10000 100000 1000000 Primary current (A) Frequency [Hz] Figure 1: Linearity error Figure 2: Frequency response Vout Ip Vout Ip 2 µs/div 1 µs/div Figure 3: Step response Figure 4: dv/dt 20 mV/div Figure 5: Output noise Page 7/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Typical performance characteristics I = 15 A P N Linearity error HO 15-NP Frequency characteristics 0.5 0.4 Gain [0 dB at 50 Hz] Spec Phase 6.0 180 0.3 Linearity error (%)--0000....12210 n [0 dB at 50 Hz] -0242....0000 -06160200 Phase [deg] -0.3 ai G -4.0 -120 -0.4 -0.5 -6.0 -180 -20 -15 -10 -5 0 5 10 15 20 10 100 1000 10000 100000 1000000 Primary current (A) Frequency [Hz] Figure 6: Linearity error Figure 7: Frequency response Vout Ip Vout Ip 2 µs/div 1 µs/div Figure 8: Step response Figure 9: dv/dt 20 mV/div Figure 10: Output noise Page 8/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Typical performance characteristics I = 25 A P N Linearity error HO 25-NP Frequency characteristics 0.5 Gain [0 dB at 50 Hz] Spec Phase 0.4 6.0 180 0.3 Linearity error (%)--0000....12210 n [0 dB at 50 Hz] -0242....0000 -06160200 Phase [deg] -0.3 ai G -4.0 -120 -0.4 -0.5 -6.0 -180 -30 -20 -10 0 10 20 30 10 100 1000 10000 100000 1000000 Primary current (A) Frequency [Hz] Figure 11: Linearity error Figure 12: Frequency response Vout Ip Vout Ip 2 µs/div 1 µs/div Figure 13: Step response Figure 14: dv/dt 20 mV/div Figure 15: Output noise Page 9/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Maximum continuous DC primary current 50 100 40 75 30 A) A) I(P20 I (P 50 25 10 111111185555555AAAAAAAA 1111111155555555AAAAAAAA 0 0 0 25 50 75 100 125 0 25 50 75 100 125 T (°C) T (°C) A A 125 100 75 A) (P I 50 25 25A 0 0 25 50 75 100 125 T (°C) A Figure 16: I vs T for HO series P A Important notice: whatever the usage and/or application, the transducer jumper temperature shall not go above the maximum rating of 120 °C as stated in page 2 of this datasheet. Page 10/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Measuring range with external reference voltage 50 Upper limit: I = −10 × V +45 (V = 0.5 ... 2.65 V) P ref ref 40 Lower limit: I = −10 × V +5 (V = 0.5 ... 2.65 V) 30 P ref ref 20 ) A ( 10 P I 0 -10 -20 HO 8 -30 0.5 1 1.5 2 2.5 V (V) ref 100 Upper limit: I = −18.75 × V +84.38 (V = 0.5 ... 2.65 V) P ref ref 80 Lower limit: I = −18.75 × V +9.38 (V = 0.5 ... 2.65 V) 60 P ref ref 40 ) A ( 20 P I 0 -20 -40 HO 15 -60 0.5 1 1.5 2 2.5 V (V) ref 120 Upper limit: T = 105 °C I = 80 (V = 0.5 ... 1.94 V) 90 A P ref I = −31.25 × V +140.63 (V = 1.94 ... 2.65 V) P ref ref 60 25 T = 85 °C I = 90 (V = 0.5 ... 1.62 V) A) 30 60 A IP = −31.2re5f × V +40.63 (V = 1.62 ... 2.65 V) (P 0 85℃ P ref ref I ℃ T = 60 °C I = 100 (V = 0.5 ... 1.3 V) 105 A P ref -30 ℃ I = −31.25 × V +140.63 (V = 1.3 ... 2.65 V) P ref ref ℃ -60 HO 25 T = 25 °C I = 110 (V = 0.5 ... 0.98 V) A P ref -90 I = −31.25 × V +140.63 (V = 0.98 ... 2.65 V) P ref ref 0.5 1 1.5 2 2.5 Lower limit: I = −31.25 × V +15.63 (V = 0.5 ... 2.5 V) V (V) P ref ref ref Example with V = 0.5 V: ref ● The 8 A version has a measuring range from 0 A to 40 A ● The 15 A version has a measuring range from 0 A to 75 A ● The 25 A version has a measuring range from 0 A to 80 A at T = 105 °C A Example with V = 1.5 V: ref ● The 8 A version has a measuring range from −10 A to +30 A ● The 15 A version has a measuring range from −18.7 A to +56.3 A ● The 25 A version has a measuring range from −31.2 A to +90 A at T = 85 °C A Page 11/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Application information Total primary resistance The primary resistance is 0.36 mΩ per conductor at 25 °C. In the following table, examples of primary resistance according to the number of primary turns. Number of Resistance of Primary nominal RMS current primary turns primary (winding) Recommended connections I [ A ] N R [ mΩ ] PN P P 13 12 11 OUT 1 0.12 8 15 25 IN 8 9 10 13 12 11 OUT 2 0.54 4 7.5 12.5 IN 8 9 10 13 12 11 OUT 3 1.18 2.67 5 8.33 IN 8 9 10 Definition of typical, minimum and maximum values Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown in “typical” graphs. On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower limits and a probability for measured values to lie within this interval. Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the probability for values of samples to lie in this interval is 99.73 %. For a normal (Gaussian) distribution, this corresponds to an interval between -3 sigma and +3 sigma. If “typical” values are not obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to an interval between -sigma and +sigma for a normal distribution. Typical, maximal and minimal values are determined during the initial characterization of a product. Page 12/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series HO-NSM Series: name and codification HO family products may be ordered on request 1) with a dedicated setting of the parameters described below (standard products are delivered with the setting 0000 according to the table). HO 15-NSM-XXXX Reference out: Response time: EEPROM Control: Overcurrent detection: 0 2.5 V 0 3.5 µs 0 YES 0 2.9 1 1.65 V 1 2 µs 1 NO 1 3.6 2 1.5 V 2 6 µs 2 4.0 3 0.5 V 3 4.8 4 only V IN 4 5.2 SET_THRESH = 0 ref (Low power mode engaged) 5 5.8 6 1.7 7 2.3 A 0.67 B 0.94 C 1.17 D 1.4 SET_THRESH = 1 E 1.6 F 1.9 G 2.1 H 2.3 Standard products are: - HO 8-NSM-0000 - HO 15-NSM-0000 - HO 25-NSM-0000 Note: 1) For dedicated settings, minimum quantities apply. Page 13/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series PCB footprint Reflow profile Safety This transducer must be used in limited-energy secondary circuits according to IEC 61010-1. This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer’s operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (e.g. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a build-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. Remark Installation of the transducer must be done unless otherwise specified on the datasheet, according to LEM Transducer Generic Mounting Rules. Please refer to LEM document N°ANE120504 available on our Web site: Products/Product Documentation. Page 14/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Performance parameters definition Ampere-turns and amperes I (DC) The transducer is sensitive to the primary current linkage Θ P P (also called ampere-turns). I P N Θ = N ·I (At) P P P t Where N isthe number of primary turn (depending on 2 the connePcti on of the primary jumpers) 0 A t I p ( t 1 3) t Ip(3) Caution: As most applications will use the transducer with −I P1 only one single primary turn (N = 1), much of this datasheet is P written in terms of primary current instead of current linkages. Figure 17 : Current cycle used to measure magnetic and elec- However, the ampere-turns (At) unit is used to emphasis that trical offset current linkages are intended and applicable. (transducer supplied) Transducer simplified model Electrical offset The static model of the transducer at temperature T is: The electrical offset voltage V can either be measured when A O E V = G·Θ + overall error (mV) the ferro-magnetic parts of the transducer are: out P In which error = εG ·ΘP·G + εL·ΘP·G + TCG (TA−25)·ΘP·G + VO E + TCVO E·(TA−25) (mV) ● completely demagnetized, which is difficult to realize, ● or in a known magnetization state, like in the current cycle With: Θ = N ·I : primary current linkage (At) P P P Θ : max primary current linkage applied to shown in figure 17. P max the transducer (At) Using the current cycle shown in figure 18, the electrical offset V : output voltage (V) is: out T : ambient operating temperature (°C) A V (t)+V (t) V : electrical offset current (V) V = out 1 out 2 TCO VE : temperature coefficient of V (mV/K) O E 2 O E O E G : sensitivity of the transducer (V/At) ... (T)=... (T)−... (25 °C) TCG : temperature coefficient of G (%/K) Note: the transducer hOTas to OEbe dOeEmagnetized prior to ε : sensitivity error (%) the application of the current cycle (for example with a G ε(Θ ) : linearity error for Θ (%) demagnetization tunnel). L P max P max Overall accuracy This model is valid for primary ampere-turns Θ between P −Θ and +Θ only. The overall accuracy at 25 °C X is the error in the P max P max G −I ... +I range, relative to the rated value I . Sensitivity and linearity P N P N P N It includes: To measure sensitivity and linearity, the primary current (DC) is ● the electrical offset V / Θ ·G (%) cycled from 0 to I, then to −I and back to 0 (equally spaced O E P P P ● the sensitivity error ε (%) I /10 steps). The sensitivity G is defined as the slope of the G P linear regression line for a cycle between ±I . ● the linearity error ε (to I ) (%) P N L P N The linearity error ε is the maximum positive or negative L Response and reaction times difference between the measured points and the linear regression line, expressed in % of I . The step response time t and the reaction time t are shown P N r ra in figure 18. Magnetic offset Both depend on the primary current di/dt. They are measured The magnetic offset voltage V is the consequence of a current at nominal ampere-turns. O M on the primary side (“memory effect” of the transducer’s ferro- I magnetic parts). It is measured using the following primary current cycle. V depends on the current value I (I > I ). O M P1 P1 P M 100 % V (t )−V (t ) 90 % V = out 1 out 2 O M 2 I Vout P t r 10 % tra t Figure 18: Step response time t and reaction time t r ra Page 15/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

HO-NSM series Dimensions (in mm, general linear tolerance ±0.5 mm) Connection OUT 111213 1 +U 2 47nF c 0V 5Ω 3 4.7nF V 200Ω4 47nF out V (IN/OUT) 5 >10kΩ ref OCD 6 STANDBY 7 10 9 8 N/A (connected to ground) IN d d Cl Cp Page 16/16 31May2018/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com