SIEMENS Simatic S7-300

SIEMENS Simatic S7-300

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SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY
ISOLATATED, 8 AI THERMOCOUPLE, TYPE B, E, J, K, L, N, R, S,
T TXK/TXK(L) ACCORDING GOST 16 BIT, 50 MS, 1 X 40 PIN

Supply voltage
Load voltage L+
● Rated value (DC) : 24 V
● Reverse polarity protection : Yes

Input current
From load voltage L+ (without load), max. : 240 mA
From backplane bus 5 V DC, max. : 100 mA

Power loss
Power loss, typ. : 3 W

Analog inputs
Number of analog inputs : 8
Permissible input voltage for voltage input (destruction limit), max. : 75 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20)

Characteristic linearization
● Parameterizable : Yes
— For thermocouples Type B, E, J, K, L, N, R, S. T, U, C

Cable length
● shielded, max. : 100 m

Analog value generation for the inputs
Measurement principle : integrating

Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. : 16 bit; Two’s complement
● Integration time, parameterizable : Yes
● Basic conversion time (ms) : Up to 4 channels: 10 ms per module, 5 channels upwards: 190 ms per module
● Interference voltage suppression for interference frequency f1 in Hz : 400 / 60 / 50 Hz

Errors/accuracies
Operational error limit in overall temperature range
● Voltage, relative to input range, (+/-) : +/- 1 K

Isolation
Isolation tested with : 500 V DC

Connection method
Required front connector : 40-pin

Dimensions
Width : 40 mm
Height : 125 mm
Depth : 120 mm

Weights
Weight, approx. : 272 g

 

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