SIMATIC S7-300 – SM331 Ex Analog Input Modules – Siemens Analog Modules

$ 461.19 – $ 563.20

SKU: N/A

Ex analog input modules are used for the connection of intrinsically-safe analog equipment from the Ex field.

Siemens Ex Analog Input Modules SIMATIC S7-300 Product Specifications:

Article number 6ES7331-7RD00-0AB0 6ES7331-7SF00-0AB0
SIMATIC S7, SM 331 ANALOG INPUT SIMATIC S7, SM 331 ANALOG INPUT
Supply voltage
Load voltage L+
● Rated value (DC) 24 V 24 V
● Reverse polarity protection Yes
Input current
from load voltage L+ (without load), max. 250 mA
from backplane bus 5 V DC, max. 60 mA 120 mA
output voltage / header
supply voltage of the transmitters / header
● supply voltage / of the transmitters / at DC / rated value 13 V; at 22 mA
Power loss
Power loss, typ. 3 W 0.6 W
Analog inputs
Number of analog inputs 4 8; 8x thermocouples; 4x RTD thermoresistors
permissible input current for current input (destruction limit), max. 40 mA
Input ranges
● Voltage No Yes
● Current Yes No
● Thermocouple No Yes
● Resistance thermometer No Yes
● Resistance No Yes
Input ranges (rated values), voltages
● -1 V to +1 V Yes
— Input resistance (-1 V to +1 V) 10 MΩ
● -25 mV to +25 mV Yes
— Input resistance (-25 mV to +25 mV) 10 MΩ
● -250 mV to +250 mV Yes
— Input resistance (-250 mV to +250 mV) 10 MΩ
● -50 mV to +50 mV Yes
— Input resistance (-50 mV to +50 mV) 10 MΩ
● -500 mV to +500 mV Yes
— Input resistance (-500 mV to +500 mV) 10 MΩ
● -80 mV to +80 mV Yes
— Input resistance (-80 mV to +80 mV) 10 MΩ
Input ranges (rated values), currents
● 0 to 20 mA Yes
— Input resistance (0 to 20 mA) 50 Ω
● 4 mA to 20 mA Yes
— Input resistance (4 mA to 20 mA) 50 Ω
Input ranges (rated values), thermocouples
● Type B Yes
— Input resistance (Type B) 10 MΩ
● Type E Yes
— Input resistance (Type E) 10 MΩ
● Type J Yes
— Input resistance (type J) 10 MΩ
● Type K Yes
— Input resistance (Type K) 10 MΩ
● Type L Yes
— Input resistance (Type L) 10 MΩ
● Type N Yes
— Input resistance (Type N) 10 MΩ
● Type R Yes
— Input resistance (Type R) 10 MΩ
● Type S Yes
— Input resistance (Type S) 10 MΩ
● Type T Yes
— Input resistance (Type T) 10 MΩ
● Type U Yes
— Input resistance (Type U) 10 MΩ
Input ranges (rated values), resistance thermometer
● Ni 100 Yes
— Input resistance (Ni 100) 10 MΩ
● Pt 100 Yes
— Input resistance (Pt 100) 10 MΩ
● Pt 200 Yes
— Input resistance (Pt 200) 10 MΩ
Cable length
● shielded, max. 200 m 200 m; TC: 50 m
Analog value generation for the inputs
Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. 16 bit; 10 bit to 15 bit + sign 16 bit; 10 bit to 15 bit + sign
● Integration time, parameterizable Yes; 2.5 to 100 ms Yes; 2.5 to 100 ms
● Interference voltage suppression for interference frequency f1 in Hz 10 to 400 Hz 10 to 400 Hz
Encoder
Connection of signal encoders
● for current measurement as 2-wire transducer Yes Yes
● for current measurement as 4-wire transducer Yes Yes
Errors/accuracies
Operational error limit in overall temperature range
● Current, relative to input range, (+/-) 0.45 %
● Resistance thermometer, relative to input range, (+/-) 0.04 %; 0.09 to 0.04%
Basic error limit (operational limit at 25 °C)
● Current, relative to input range, (+/-) 0.1 %
● Resistance thermometer, relative to input range, (+/-) 0.008 %; 0.018 … 0.008%
Interrupts/diagnostics/status information
Diagnostics function Yes Yes
Diagnoses
● Diagnostic information readable Yes Yes
● Overrange Yes Yes
● Wire-break in signal transmitter cable Yes Yes
● Short-circuit of the signal encoder cable Yes Yes
Diagnostics indication LED
● Group error SF (red) Yes Yes
● Channel fault indicator F (red) Yes Yes
Ex(i) characteristics
Module for Ex(i) protection Yes Yes
maximum values for connecting terminals for gas group IIC
● Uo (no-load voltage), max. 25.2 V 5.9 V
● Io (short-circuit current), max. 68.5 mA 28.8 mA
● Po (power output), max. 431 mW 41.4 mW
● Co (permissible external capacity), max. 90 nF 43 µF
● Lo (permissible external inductivity), max. 7.5 mH 40 mH
Potential separation
Potential separation analog inputs
● between the channels Yes No
● between the channels and backplane bus Yes Yes
Standards, approvals, certificates
Use in hazardous areas
● ATEX marking ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc
● FM marking Class I, Division 2, Group A, B, C, D T4 Class I, Division 2, Group A, B, C, D T4
● Test number PTB Ex-96.D.2092X Ex-96.D.2108X
Ambient conditions
Ambient temperature during operation
● max. 60 °C 60 °C
connection method / header
required front connector 20-pin 20-pin
Dimensions
Width 40 mm
Height 125 mm
Depth 120 mm
Weights
Weight, approx. 290 g 210 g
Weight N/A
Dimensions N/A

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