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6ES7331-7PF11-0AB0

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The SM 331 thermocouple input module Siemens 6ES7331-7PF11-0AB0 acquires eight channels of temperature signals for SIMATIC S7-300 systems.
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Technical specifications for 6ES7331-7PF11-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7331-7PF11-0AB0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    SM 331 Thermocouple Input Module
  • Stock:
    1
  • Analog Inputs:
    8 thermocouple channels
  • Resolution:
    16 bit including sign
  • Thermocouple Types:
    B, C, E, J, K, L, N, R, S, T, U, TXK/TXK(L)
  • Front Connector:
    40-pin
  • External Supply:
    24 V DC
  • External Current:
    240 mA
  • Backplane Current:
    100 mA at 5 V DC
  • Power Loss:
    3 W
  • Cold-Junction Compensation:
    Internal; external Pt100; compensation socket; fixed reference
  • Shielded Cable Length:
    100 m maximum
  • Interference Suppression:
    400, 60 or 50 Hz
  • Isolation Grouping:
    2 channels per group
  • Isolation Test Voltage:
    500 V DC
  • Alarm Functions:
    Diagnostic and limit-value interrupts
  • Status Indication:
    Red SF group-fault LED
  • Isochronous Operation:
    Not supported
  • Weight:
    0.7143 lbs (0.324 kg)
  • Estimated shipping dimensions:
    15×13.1×5cm
  • Tariff Code:
    85389091
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Compensation Event Handling Cable Installation Input Selection

Features:

  • Thermocouple type selection controls the linearization.
  • Cold-junction compensation offers internal and external arrangements.
  • Limit-value interrupts are available for the measured channels.
The 6ES7331-7PF11-0AB0 input channels are not general-purpose current inputs. Their measurement function is assigned to thermocouples, even though a Pt100 may appear in an external compensation arrangement.

Integration time and interference suppression on 6ES7331-7PF11-0AB0 are configurable. These settings concern measurement processing, rather than changing the number of physically connected sensors.

Fault indication on 6ES7331-7PF11-0AB0 includes a red SF group indicator. Diagnostic messages and interrupt handling supply information beyond the presence of that single LED.

The Siemens 6ES7331-7PF11-0AB0 SM 331 Thermocouple Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7331-7PF11-0AB0 SM 331 Thermocouple Input Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Choose how the reference junction is represented

  • Internal reference: Internal compensation uses the module's internal reference-junction arrangement.
  • External reference: A Pt100 can be used for external reference-junction compensation rather than as a general measuring input.
  • Compensation socket: A compensation socket provides another supported reference-junction arrangement.
  • Fixed reference: A defined reference temperature can be selected instead of measuring an external reference.

Distinguish a measured limit from a diagnostic event

  • Process event: Limit-value interrupts relate to a configured measurement limit.
  • Diagnostic event: Diagnostic alarms relate to module or channel diagnostic conditions.
  • Grouping: Diagnostic interrupt handling is parameterizable by channel group.
  • Channel coverage: Hardware-interrupt capability covers channels 0 through 7.

Match the field wiring to thermocouple measurement

  • Cable shielding: The permitted field-cable length is specified for shielded cable.
  • Terminal connection: Sensor wiring reaches the module through the forty-pin front connector.
  • Supply protection: Reverse-polarity protection applies to the external supply connection.
  • Input stress: The input-destruction limits describe accidental electrical stress, not an admissible thermocouple measuring range.

Keep measurement modes distinct

  • Sensor family: Select a supported thermocouple characteristic for each configured measurement.
  • Current signals: The module does not provide a general current-measurement range.
  • Resistance signals: Resistance and RTD measurement are not listed as channel measuring modes.
  • Voltage signals: Thermocouple acquisition must not be treated as a general-purpose voltage-input function.
Description
Thermocouple acquisition is the role of Siemens 6ES7331-7PF11-0AB0, an SM 331 analog input module for the SIMATIC S7-300 system. Eight temperature-input channels connect through a forty-pin front connector and provide measured values to the automation system.

Conversion in 6ES7331-7PF11-0AB0 includes thermocouple linearization for the selected sensor type. Measured values are represented with a sign and two's-complement coding, so the digital representation is not an unsigned count of the input voltage.

Channel isolation on 6ES7331-7PF11-0AB0 is organized in pairs rather than independently for every input. Isolation also separates the input channels from the backplane bus and the power supply. The channel grouping therefore matters when the field-side circuits are arranged.

The front-side supply and backplane connection power different parts of 6ES7331-7PF11-0AB0. A 24 V external supply and the 5 V backplane supply have separate current-consumption figures, while the module has a single total power-loss specification.
Alternative Names
6ES73317PF110AB0 6ES7331 7PF11 0AB0 6ES7 331-7PF11-0AB0 Siemens 6ES7331-7PF11-0AB0 6ES7331-7PF11-0AB0 SM 331 Thermocouple Input Module 6ES7331-7PF11-OABO 6ES733I-7PF11-0AB0 SM 331 Thermocouple Input Module 6ES7331-7PF11-0AB0
Technical notes
Siemens 6ES7331-7PF11-0AB0 uses a 40-pin front connection and channel-group isolation; its input selection is dedicated to thermocouples.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Can an external Pt100 make 6ES7331-7PF11-0AB0 an RTD input module?
No. The external Pt100 serves reference-junction compensation for 6ES7331-7PF11-0AB0; it does not change the thermocouple channels into general RTD measurement inputs.
When does an alarm from 6ES7331-7PF11-0AB0 represent a process limit rather than a fault?
A configured limit-value interrupt concerns the measured process value on 6ES7331-7PF11-0AB0. A diagnostic alarm is a separate event class and should not be interpreted as the same condition.
Will 6ES7331-7PF11-0AB0 operate as an isochronous input module?
Isochronous operation is not supported by 6ES7331-7PF11-0AB0. Configurable measurement integration does not add this bus-timing capability.
Which sensor selection prevents a 4–20 mA transmitter being assigned to 6ES7331-7PF11-0AB0?
Use the thermocouple measuring modes of 6ES7331-7PF11-0AB0; no general current-input range is provided for a 4–20 mA transmitter.
Are the maximum non-destructive input voltages valid measuring ranges for 6ES7331-7PF11-0AB0?
No. Electrical stress limits on 6ES7331-7PF11-0AB0 specify survival conditions, not calibrated signal ranges. Sensor selection must remain within the supported thermocouple modes.

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