Siemens 6ES7331-7PF11-0AB0

SM 331 analog input, 8 AI, thermocouples, 16 bit

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Siemens SIMATIC S7-300 SM 331 analog input module: 8 isolated thermocouple inputs (types B, C, E, J, K, L, N, R, S, T, U and TXK/TXK(L)), 16-bit, 40-pole front connector.

Manufacturer: Siemens
Manufacturer part no.: 6ES7331-7PF11-0AB0
Product family: SIMATIC S7-300 PLC Modules
Type: Analog input module
Category: PLCs and I/O › Analogue I/O modules
Lifecycle: Discontinued
OEM successor: Not stated
Technical datasheet: Data sheet

Technical specifications

Manufacturer: Siemens
Manufacturer part no.: 6ES7331-7PF11-0AB0
Type: Analog input module
Application: Analog input module (thermocouples)
Used with: SIMATIC S7-300 rack (S7-300 backplane bus)
Product function / Isochronous mode: No
Load voltage L+ / Rated value (DC): 24 V
Load voltage L+ / Reverse polarity protection: Yes
Input current / from load voltage L+ (without load), max.: 240 mA
Input current / from backplane bus 5 V DC, max.: 100 mA
Power loss, typ.: 3 W
Number of analog inputs: 8
Analog inputs / 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)
Analog inputs / Constant measurement current for resistance-type transmitter, typ.: 0.7 mA
Input ranges / Voltage: No
Input ranges / Current: No
Input ranges / Thermocouple: Yes
Input ranges / Resistance thermometer: No
Input ranges / Resistance: No
Input ranges (rated values), voltages / 0 to +10 V: No
Input ranges (rated values), voltages / 1 V to 5 V: No
Input ranges (rated values), voltages / 1 V to 10 V: No
Input ranges (rated values), voltages / -1 V to +1 V: No
Input ranges (rated values), voltages / -10 V to +10 V: No
Input ranges (rated values), voltages / -2.5 V to +2.5 V: No
Input ranges (rated values), voltages / -250 mV to +250 mV: No
Input ranges (rated values), voltages / -5 V to +5 V: No
Input ranges (rated values), voltages / -50 mV to +50 mV: No
Input ranges (rated values), voltages / -500 mV to +500 mV: No
Input ranges (rated values), voltages / -80 mV to +80 mV: No

Show all 93 specifications

Input ranges (rated values), currents / 0 to 20 mA: No
Input ranges (rated values), currents / -10 mA to +10 mA: No
Input ranges (rated values), currents / -20 mA to +20 mA: No
Input ranges (rated values), currents / -3.2 mA to +3.2 mA: No
Input ranges (rated values), currents / 4 mA to 20 mA: No
Input ranges (rated values), thermocouples / Type B: Yes
Input ranges (rated values), thermocouples / Type C: Yes
Input ranges (rated values), thermocouples / Type E: Yes
Input ranges (rated values), thermocouples / Type J: Yes
Input ranges (rated values), thermocouples / Type K: Yes
Input ranges (rated values), thermocouples / Type L: Yes
Input ranges (rated values), thermocouples / Type N: Yes
Input ranges (rated values), thermocouples / Type R: Yes
Input ranges (rated values), thermocouples / Type S: Yes
Input ranges (rated values), thermocouples / Type T: Yes
Input ranges (rated values), thermocouples / Type U: Yes
Input ranges (rated values), thermocouples / Type TXK/TXK(L) to GOST: Yes
Input ranges (rated values), resistance thermometer / Cu 10: No
Input ranges (rated values), resistance thermometer / Ni 100: No
Input ranges (rated values), resistance thermometer / Ni 1000: No
Input ranges (rated values), resistance thermometer / LG-Ni 1000: No
Input ranges (rated values), resistance thermometer / Ni 120: No
Input ranges (rated values), resistance thermometer / Ni 200: No
Input ranges (rated values), resistance thermometer / Ni 500: No
Input ranges (rated values), resistance thermometer / Pt 100: No
Input ranges (rated values), resistance thermometer / Pt 1000: No
Input ranges (rated values), resistance thermometer / Pt 200: No
Input ranges (rated values), resistance thermometer / Pt 500: No
Input ranges (rated values), resistors / 0 to 150 ohms: No
Input ranges (rated values), resistors / 0 to 300 ohms: No
Input ranges (rated values), resistors / 0 to 600 ohms: No
Input ranges (rated values), resistors / 0 to 6000 ohms: No
Thermocouple (TC) / Temperature compensation / Parameterizable: Yes
Thermocouple (TC) / Temperature compensation / internal temperature compensation: Yes
Thermocouple (TC) / Temperature compensation / external temperature compensation with Pt100: Yes
Thermocouple (TC) / Temperature compensation / external temperature compensation with compensations socket: Yes
Thermocouple (TC) / Temperature compensation / for definable comparison point temperature: Yes
Characteristic linearization / Parameterizable: Yes
Characteristic linearization / Parameterizable / for thermocouples: Type B, E, J, K, L, N, R, S. T, U, C
Cable length / shielded, max.: 100 m
Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.: 16 bit; Two's complement
Integration and conversion time/resolution per channel / Integration time, parameterizable: Yes
Integration and conversion time/resolution per channel / Basic conversion time (ms): Up to 4 channels: 10 ms per module, 5 channels upwards: 190 ms per module
Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz: 400 / 60 / 50 Hz
Operational error limit in overall temperature range / Voltage, relative to input range, (+/-): ±1 K
Operational error limit in overall temperature range / Thermocouple, relative to input range, (+/-): Type T: ±0.18%, Type U: ±0.15%, Type E: ±0.12%, Type J: ±0.12%, Type L: ±0.17%, Type K: ±0.15%, Type N: ±0.17%, Type R: ±0.08%, Type S: ±0.10%, Type B: ±0.13%, Type C: ±0.10%, TXK/XK(L): ±1.00% accuracy in the lower range of the characteristic curve
Basic error limit (operational limit at 25 °C) / Thermocouple, relative to input range, (+/-): Type T: ±0.13%, Type U: ±0.08%, Type E: ±0.05%, Type J: ±0.04%, Type L: ±0.06%, Type K: ±0.04%, Type N: ±0.04%, Type R: ±0.03%, Type S: ±0.03%, Type B: ±0.05%, Type C: ±0.02%, TXK/XK(L): ±0.67 % accuracy in the lower range of the characteristic curve
Interrupts/diagnostics/status information / Diagnostics function: Yes; Parameterizable
Alarms / Diagnostic alarm: Yes; Parameterizable per group
Alarms / Limit value alarm: Yes; Parameterizable
Alarms / Hardware interrupt: Yes; Parameterizable, channels 0 to 7
Diagnoses / Diagnostic information readable: Yes
Diagnostics indication LED / Group error SF (red): Yes
Potential separation analog inputs / between the channels: Yes
Potential separation analog inputs / between the channels, in groups of: 2
Potential separation analog inputs / between the channels and backplane bus: Yes
Potential separation analog inputs / between the channels and the power supply of the electronics: Yes
Isolation tested with: 500 V DC
required front connector: 40-pin
Width: 40 mm
Height: 125 mm
Depth: 120 mm
Weight, approx.: 272 g

Technical documents (1)

Siemens data sheet 6ES7331-7PF11-0AB0

Key features

8 thermocouple inputs: types B, C, E, J, K, L, N, R, S, T, U and TXK/TXK(L) to GOST
16-bit resolution
Internal or external cold-junction compensation (Pt100 or compensating socket)
Hardware interrupt on limit values; diagnostics
Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7331-7PF11-0AB0

The Siemens 6ES7331-7PF11-0AB0 is the thermocouple SM 331, the companion to the resistance-thermometer 6ES7331-7PF01-0AB0. Siemens's data sheet gives 8 inputs isolated in groups of 2, 16-bit resolution, linearization for thermocouple types B, C, E, J, K, L, N, R, S, T and U and the GOST types TXK/TXK(L), and internal or external cold-junction compensation. It takes a 40-pin front connector. Siemens's data sheet marks it as a spare part.

What is the 6ES7331-7PF11-0AB0 used for?

It reads temperatures from thermocouples straight into an S7-300 CPU.

Lifecycle and successor

Discontinued.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the order number on the module: 7PF11 is for thermocouples, 7PF01 for resistance thermometers.

Other parts in the Siemens SIMATIC S7-300 family

Listed for reference. They differ from the 6ES7331-7PF11-0AB0 in rating, supply, interface or function and are not interchangeable with it unless Siemens says so. Match the part number on your unit.

Product	Type	Lifecycle	Qty Available	Price	Action
Siemens 6ES7331-7KF02-0AB0SM 331 analog input, 8 AI, U/I/thermocouple/resistance	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7331-7KB02-0AB0SM 331 analog input, 2 AI, U/I/thermocouple/resistance	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-1KF02-0AB0SM 331 analog input, 8 AI, 13 bit, U/I/resistance/Pt100/Ni	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-7NF00-0AB0SM 331 analog input, 8 AI, 16 bit, U/I	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-7PF01-0AB0SM 331 analog input, 8 AI, RTD, 16 bit	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7332-5HD01-0AB0SM 332 analog output, 4 AO, voltage/current	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7334-0KE00-0AB0SM 334 analog module, 4 AI / 2 AO, 12 bit	Analog I/O module	Discontinued	On Request	On request	View
Siemens 6ES7331-7NF10-0AB0SM 331 analog input, 8 AI, 16 bit, U/I, 4-channel fast mode	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7331-7HF01-0AB0SM 331 analog input, 8 AI, 14 bit, 52 µs per channel	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7332-5HB01-0AB0SM 332 analog output, 2 AO, voltage/current, 12 bit	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7332-7ND02-0AB0SM 332 analog output, 4 AO, 16 bit, isolated per channel	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7338-4BC01-0AB0SM 338 position input module, 3 SSI encoders	Position input module	Discontinued	On Request	On request	View

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