SM 1238 Energy Meter 480 V AC analog input module

• Заказные данные
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• Аксессуары
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• Информационные материалы

  Информационные материалы

  • Energy management based on SIMATIC S7-1200
  • Data acquisition of electrical characteristics in 1 and 3-phase networks up to 480 V AC
  • Direct connection of voltage inputs
  • Current measurement performed by 1 A and 5 A current transformers
  • Can be used in TN and TT networks
  • Data backup of measurement data in the event of a power failure

  Область применения

  The SM 1238 Energy Meter 480 V AC is designed for use at machine level in an S7-1200 system. It registers various electrical and other measured values. This makes it possible to acquire transparency about the energy requirements of individual components of the production system starting at the machine-level.

  The measured values provided by the SM 1238 Energy Meter 480 V AC can be used to determine energy requirements, power consumption and efficiency as well as make demand forecasts. Measurement data about power consumption are vital for load management and maintenance. They can also be used for emission reporting and calculating the CO₂ footprint.

  Дизайн

  The signal modules have the same design features as the basic units.

  • Installation on DIN rails:
    The modules are snapped onto the rail next to the CPU on the right and are electrically and mechanically connected to each other and to the CPU by the integral slide mechanism.
  • Direct installation:
    Horizontal or vertical mounting on DIN rail or direct mounting in the cabinet using integral lugs.

  Функции

  • Measurement of electrical variables from one, two or three-phase supply networks
  • Max. nominal voltage between two line conductors 480 V AC
  • Retentive storage of counter readings
  • Detection of:
    • Voltages
    • Currents
    • Phase angles
    • Services
    • Energy / electrical work
    • Frequencies
    • Minimum and maximum values
    • Performance factors
    • Operating hours

  The module supports the following system functions:

  • Firmware update
  • Calibration during runtime
  • I&M identification data
  • Reconfiguration in RUN
  • Diagnostics and hardware interrupts

  Технические данные

  Order number		6ES7238-5XA32-0XB0
  		SM 1238 Energy Meter 480V AC
  General information
  Product type designation		SM 1238 AI Energy Meter 480 VAC
  Product function
  ● Voltage measurement		Yes
  ● Voltage measurement with voltage transformers		Yes
  ● Current measurement		Yes
  ● Phase current measurement without current transformers		No
  ● Phase current measurement with current transformers		Yes
  ● Energy measurement		Yes
  ● Frequency measurement		Yes
  ● Power measurement		Yes
  ● Active power measurement		Yes
  ● Reactive power measurement		Yes
  ● I&M data		Yes; I&M 0
  ● Isochronous mode		No
  Engineering with
  ● STEP 7 TIA Portal configurable/integrated as of version		V13 SP1
  Operating mode
  ● cyclic measurement		Yes
  ● acyclic measurement		Yes
  ● Acyclic measured value access		Yes
  ● Fixed measured value sets		Yes
  ● Freely definable measured value sets		Yes
  CiR – Configuration in RUN
  Reparameterization possible in RUN		Yes
  Calibration possible in RUN		Yes
  Installation type/mounting
  Mounting position		Horizontal, vertical
  Supply voltage
  Design of the power supply		Supply via voltage measurement channel L1
  Type of supply voltage		AC 100 - 277 V
  permissible range, lower limit (AC)		90 V
  permissible range, upper limit (AC)		293 V
  Line frequency
  ● permissible range, lower limit		47 Hz
  ● permissible range, upper limit		63 Hz
  Power loss
  Power loss, typ.		0.6 W
  Address area
  Address space per module
  ● Address space per module, max.		124 byte; 112 byte input / 12 byte output
  Analog inputs
  Cycle time (all channels), typ.		50 ms; Time for consistent update of all measured and calculated values (cyclic und acyclic data)
  Interrupts/diagnostics/status information
  Alarms
  ● Diagnostic alarm		Yes
  ● Limit value alarm		Yes
  ● Hardware interrupt		No
  Diagnostics indication LED
  ● Monitoring of the supply voltage (PWR-LED)		Yes
  ● Channel status display		Yes; Green LED
  ● for channel diagnostics		Yes; red Fn LED
  ● for module diagnostics		Yes; green/red DIAG LED
  Integrated Functions
  Measuring functions
  ● Measuring procedure for voltage measurement		TRMS
  ● Measuring procedure for current measurement		TRMS
  ● Type of measured value acquisition		seamless
  ● Curve shape of voltage		Sinusoidal or distorted
  ● Buffering of measured variables		Yes
  ● Parameter length		74 byte
  ● Bandwidth of measured value acquisition		2 kHz; Harmonics: 39 / 50 Hz, 32 / 60 Hz
  Operating mode for measured value acquisition
  — automatic detection of line frequency		No; Parameterizable
  Measuring range
  — Frequency measurement, min.		45 Hz
  — Frequency measurement, max.		65 Hz
  Measuring inputs for voltage
  — Measurable line voltage between phase and neutral conductor		277 V
  — Measurable line voltage between the line conductors		480 V
  — Measurable line voltage between phase and neutral conductor, min.		90 V
  — Measurable line voltage between phase and neutral conductor, max.		293 V
  — Measurable line voltage between the line conductors, min.		155 V
  — Measurable line voltage between the line conductors, max.		508 V
  — Measurement category for voltage measurement in accordance with IEC 61010-2-030		CAT II; CAT III in case of guaranteed protection level of 1.5 kV
  — Internal resistance line conductor and neutral conductor		3.4 MΩ
  — Power consumption per phase		20 mW
  — Impulse voltage resistance 1,2/50µs		1 kV
  Measuring inputs for current
  — measurable relative current (AC), min.		1 %; Relative to the secondary rated current 5 A
  — measurable relative current (AC), max.		100 %; Relative to the secondary rated current 5 A
  — Continuous current with AC, maximum permissible		5 A
  — Apparent power consumption per phase for measuring range 5 A		0.6 V·A
  — Rated value short-time withstand current restricted to 1 s		100 A
  — Input resistance measuring range 0 to 5 A		25 mΩ; At the terminal
  — Zero point suppression		Parameterizable: 2 - 250 mA, default 50 mA
  — Surge strength		10 A; for 1 minute
  Accuracy class according to IEC 61557-12
  — Measured variable voltage		0,2
  — Measured variable current		0,2
  — Measured variable apparent power		0.5
  — Measured variable active power		0.5
  — Measured variable reactive power		1
  — Measured variable power factor		0.5
  — Measured variable active energy		0.5
  — Measured variable reactive energy		1
  — Measured variable neutral current		0.5; calculated
  — Measured variable phase angle		±1 °; not covered by IEC 61557-12
  — Measured variable frequency		0.05
  Potential separation
  Potential separation channels
  ● between the channels and backplane bus		Yes; 3 700V AC (type test) CAT III
  Isolation
  Isolation tested with		2 300V AC for 1 min. (type test)
  Ambient conditions
  Ambient temperature during operation
  ● horizontal installation, min.		-20 °C
  ● horizontal installation, max.		60 °C
  ● vertical installation, min.		-20 °C
  ● vertical installation, max.		50 °C
  Dimensions
  Width		45 mm
  Height		100 mm
  Depth		75 mm
  Weights
  Weight (without packaging)		165 g
  Data for selecting a current transformer
  ● Burden power current transformer x/1A, min.		As a function of cable length and cross section, see device manual
  ● Burden power current transformer x/5A, min.		As a function of cable length and cross section, see device manual