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SIMATIC S7-400, SM 431

technical data

		SIMATIC S7-400, analog input SM 431, potential isolation 16 analog input; Resolution 16 bits, U/I/resistor/thermoelectric/PT100, alarm, diagnosis
power supply voltage
load voltage L +
● rating (DC)		24V; Only when supplying power to the two-wire measuring converter
● reverse polarity protection		yes
input current
from load voltage L + (no load), maximum		400 mA; In 16 interconnected and fully controlled 2-wire measuring converters
DC 5V from backplane bus, maximum		700 mA
power loss
power loss, typical		4.5W
analog input
number of analog inputs		16
● voltage/current measurement		16
● When measuring resistance		8
voltage input allowed input voltage (damage limit), maximum		18V; 18V continuous voltage, 75V within 1 ms (duty cycle 1:20)
current input allowable input current (damage limit), maximum		40 mA
input range
● voltage		yes
● Current		yes
● thermocouple		yes
● Resistance thermometer		yes
● Resistance		yes
input range (rated value), voltage
● 1V to 5V		yes
● input resistance (1V to 5V)		1 M?
● -1v to +1v		yes
● input resistance (-1V to +1V)		1 M?
● -10V to +10V		yes
● input resistance (-10V to +10V)		1 M?
● -2.5V to +2.5V		yes
● input resistance (-2.5V to +2.5V)		1 M?
● -25 mV to +25 mV		yes
● input resistance (-25 mV to +25 mV)		1 M?
● -250 mV to +250 mV		yes
● input resistance (-250 mV to +250 mV)		1 M?
● -5V to +5V		yes
● input resistance (-5V to +5V)		1 M?
● -50 mV to +50 mV		yes
● input resistance (-50 mV to +50 mV)		1 M?
● -500 mV to +500 mV		yes
● input resistance (-500 mV to +500 mV)		1 M?
● -80 mV to +80 mV		yes
● input resistance (-80 mV to +80 mV)		1 M?
Input range (rated value), current
● 0 to 20 mA		yes
● input resistance (0 to 20 mA)		50?
● -10 mA to +10 mA		yes
● input resistance (-10 mA to +10 mA)		50?
● -20 mA to +20 mA		yes
● input resistance (-20 mA to +20 mA)		50?
● 4 mA to 20 mA		yes
● input resistance (4 mA to 20 mA)		50?
● -5 mA to +5 mA		yes
● input resistance (-5 mA to +5 mA)		50?
Input range (rating), thermocouple
● Type B		yes
● Type E		yes
● Type J		yes
● Type K		yes
● Type L		yes
● Type N		yes
● Type R		yes
● Type S		yes
● Type T		yes
● Type U		yes
input range (rated value), resistance thermometer
● Ni 100		yes
● input resistance (Ni 100)		1 M?
● Ni 1000		yes
● input resistance (Ni 1000)		1 M?
● Pt 100		yes
● input resistance (Pt 100)		1 M?
● Pt 1000		yes
● input resistance (Pt 1000)		1 M?
● Pt 200		yes
● input resistance (Pt 200)		1 M?
● Pt 500		yes
● input resistance (Pt 500)		1 M?
Input range (rated value), resistance
● 0 to 48 Ohm		yes
● input resistance (0 to 48 Ohm)		1 M?
● 0 to 150 Ohm		yes
● input resistance (0 to 150 ohm)		1 M?
● 0 to 300 ohm		yes
● input resistance (0 to 300 ohm)		1 M?
● 0 to 600 ohm		yes
● input resistance (0 to 600 ohm)		1 M?
● 0 to 6000 Ohm		yes; To 5000 Ohm available
● input resistance (0 to 6000 Ohm)		1 M?
Thermocouple (TC)
temperature compensation
-External temperature compensation using Pt100		yes
-External temperature compensation using compensation box		yes
-Dynamic reference temperature value		yes
characteristic linearisation
● parameterizable		yes
-For thermocouple		type B, E, J, K, L, N, R, S, T, U
-For resistance thermometer		Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000
wire Length
● shielding, maximum		200 m; 50 m for thermocouple and input range <= 80 mV
analog value composition at input
integration and conversion time/resolution per channel
● resolution with overmodulation (digits including symbols), maximum		16 bit; 16 / 16 / 16
● parameterized integration time		yes
● Basic conversion time (ms)		6 / 20,1 / 23,5 ms
● integral time (ms)		2,5 / 16,7 / 20 ms
● Basic conversion time, including integration time (ms)
-Additional switching time for disconnection monitoring		4.3 / 4.3 / 4.3 ms
-Additional Conversion time for resistance measurement		12 / 40,2 / 47 ms
-Additional switching time for disconnection monitoring and resistance measurement		5,5 ms
● suppression of interference voltage at interference frequency f1 (unit Hz)		400 / 60 / 50Hz
sensor
signal sensor connection
● used for voltage measurement		yes; Possible
● current measurement as a two-wire measuring transmitter		yes
● current measurement as a four-wire measuring transmitter		yes
● For resistance measurement using two-wire interface		yes; Cable resistance is measured together
● Resistance measurement using three-wire interface		yes
● Resistance measurement using four-wire interface		yes
error/precision
Operating error limits over the entire temperature range
● voltage, related to the input range,(+/-)		0.3 %; ± 0.3 %,± 500 mV,± 1V,± 2.5V,± 5V,1 to 5V,± 10V at ± 250 mV; ± 0.31% at ± 80 mV; ± 0.32% at ± 50 mV; ± 0.35% at ± 25 mV
● Current, related to the input range,(+/-)		0.3 %; At 0 to 20 mA,± 5 mA,± 10 mA,± 20 mA,4 to 20 mA
● Resistance, related to the input range,(+/-)		0.3 %; ± 0.3% at 0 to 48 Ohm(4 conductor measurement),0 to 150 Ohm(4 conductor measurement),0 to 300 Ohm(4 conductor measurement),0 to 600 Ohm(4 conductor measurement),0 to 5000 Ohm(4 conductor measurement, within 6000 Ohm range); ± 0.4 %(3 conductor measurement) when 0 to 300 Ohm, 0 to 600 Ohm(3 conductor measurement),0 to 5000 Ohm(3 conductor measurement, in the range of 6000 Ohm)
● Resistance Temperature, related to the input range,(+/-)		0.4%
basic error limit (Operation error limit at 25°C)
● voltage, related to the input range,(+/-)		0.15 %; ± 0.15%,± 500 mV,± 1V,± 2.5V,± 5V,1V to 5V,± 10V at ± 250 mV; ± 0.17% at ± 80 mV; ± 0.19% at ± 50 mV; ± 0.23% at ± 25 mV
● Current, related to the input range,(+/-)		0.15 %; At 0 to 20 mA,± 5 mA,± 10 mA,± 20 mA,4 to 20 mA
● Resistance, related to the input range,(+/-)		0.15 %; ± 0.15% at 0 to 48 Ohm (4 conductor measurement),0 to 150 Ohm (4 conductor measurement),0 to 300 ohm (4 conductor measurement),0 to 5000 Ohm (4 conductor measurement, in the range of 6000 Ohm); ± 0.3 %(3 conductor measurement) when 0 to 300 ohm, 0 to 600 ohm (3 conductor measurement),0 to 5000 Ohm (3 conductor measurement, in the range of 6000 Ohm)
● Resistance Temperature, related to the input range,(+/-)		0.3%
alarm/diagnosis/status information
alarm
● diagnostic alarm		yes; Parameterizable
● limit value alarm		yes; Parameterizable
potential isolation
analog Input potential isolation
● analog input potential isolation		yes; Internal/external
● between channels		no
insulation
insulation Test, use		2120V DC is between bus and L +/M; 2120V DC is between bus and analog components; 500V DC is between bus and position ground; 500V DC is between analog components and L +/M; 2120V DC is between bus and location ground; 2120V DC is between L +/M and location ground
size
width		25 mm
height		290 mm
depth		210 mm
weight
weight, about		500g

Update time：20241017150731