| SIMATIC S7-400, analog input SM 431,8 analog input; Resolution 16-bit, U/I/Thermoelectric, potential isolation connected to common potential, diagnosis, alarm, 20 ms conversion time |
input current |
DC 5V from backplane bus, maximum | 1 200 mA |
power loss |
power loss, typical | 4.6W |
analog input |
number of analog inputs | 8 |
● voltage/current measurement | 8 |
voltage input allowed input voltage (damage limit), maximum | 35V; 35V continuous voltage, 75V within 1 s maximum (duty cycle 1:20) |
current input allowable input current (damage limit), maximum | 32 mA |
input range |
● voltage | yes |
● Current | yes |
● thermocouple | yes |
● Resistance thermometer | no |
● Resistance | no |
input range (rated value), voltage |
● 1V to 5V | yes |
● input resistance (1V to 5V) | > 2000 Ohm |
● -1v to +1v | yes |
● -10V to +10V | yes |
● -100 mV to +100 mV | yes |
● -2.5V to +2.5V | yes |
● -20 mV to +20 mV | yes |
● -250 mV to +250 mV | yes |
● -5V to +5V | yes |
● -50 mV to +50 mV | yes |
● -500 mV to +500 mV | yes |
● -80 mV to +80 mV | yes |
input range (rated value), current |
● 0 to 20 mA | yes |
● -10 mA to +10 mA | yes |
● -20 mA to +20 mA | yes |
● -3.2 mA to +3.2 mA | yes |
● 4 mA to 20 mA | yes |
● input resistance (4 mA to 20 mA) | 50? |
● -5 mA to +5 mA | yes |
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 |
thermocouple (TC) |
temperature compensation |
-Internal temperature compensation | 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 |
wire Length |
● shielding, maximum | 200 m |
analog value composition at input |
integration and conversion time/resolution per channel |
● resolution with overmodulation (digits including symbols), maximum | 16 bit |
● parameterized integration time | yes |
● Basic conversion time (ms) | 10/16, 7/20/100 |
● integral time (ms) | 2, 5/16, 7/20/100 |
● Basic conversion time, including integration time (ms) | |
-Additional switching time for disconnection monitoring and resistance measurement | 1 ms (component) |
● suppression of interference voltage at interference frequency f1 (unit Hz) | 400 / 60 / 50 / 10Hz |
sensor |
signal sensor connection |
● used for voltage measurement | yes; Possible |
● current measurement as a four-wire measuring transmitter | 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% |
● Current, related to the input range,(+/-) | 0.5% |
basic error limit (Operation error limit at 25°C) |
● voltage, related to the input range,(+/-) | 0.1% |
● Current, related to the input range,(+/-) | 0.17% |
alarm/diagnosis/status information |
alarm |
● diagnostic alarm | yes; Parameterizable |
● limit value alarm | yes |
potential isolation |
analog Input potential isolation |
● analog input potential isolation | yes; Internal/external |
● between channels | yes |
insulation |
insulation Test, use | DC 1500V |
size |
width | 25 mm |
height | 290 mm |
depth | 210 mm |
weight |
weight, about | 650g |