SM 1238 电能测量模块 480V AC

 技术数据

Technical data

		SIMATIC S7-1200, Analog input, SM 1238 Energy Meter 480 V AC, power measurement module for data acquisition in 1- and 3-phase supply systems (TN, TT) up to 480 V AC; Current range: 1 A, ***; acquisition of voltage, current, phase angles, power, energy values, frequencies; Channel diagnostics
General information
Product type designation		SM 1238, AI energy meter 480 V AC
HW functional status		From FS02
Firmware version		V2.0.1
Product function
● Voltage measurement		Yes
— with voltage transformer		Yes
● Current measurement		Yes
— without current transformer		No
— with current transformer		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 from 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		No
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		from CPU
Type of supply voltage		DC
Input current
Current consumption, max.		180 mA
Power loss
Power loss, typ.		0.75 W
Address area
Address space per module
● Address space per module, max.		124 byte; 112 byte input / 12 byte output
Time of day
Operating hours counter
● present		Yes
Analog inputs
Cycle time (all channels), typ.		50 ms; Time for consistent updat 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
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.		0 V
— Measurable line voltage between phase and neutral conductor, max.		293 V
— Measurable line voltage between the line conductors, min.		0 V
— Measurable line voltage between the line conductors, max.		508 V
— Internal resistance line conductor and neutral conductor		3.4 M
— Power consumption per phase		20 mW
— Impulse voltage resistance 1,2/50µs		1 kV
— 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
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 m At the terminal
— Surge strength		10 A; for 1 minute
— Zero point suppression		Parameterizable: 2 ... 250 mA, default 50 mA
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)
Standards, approvals, certificates
CE mark		Yes
CSA approval		Yes
UL approval		Yes
cULus		Yes
FM approval		Yes
RCM (formerly C-TICK)		Yes
KC approval		Yes
Marine approval		Yes
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, approx.		165 g
Other
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/***, min.		As a function of cable length and cross section, see device manual