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Siemens 6ES7331-7KF02-0AB0 — Analog Input Modules

Siemens 6ES7331-7KF02-0AB0 Analog Input Module, 8 AI

MPN6ES7331-7KF02-0AB0
End of Life

Siemens S7-300 analog input module, 8 channels, 6ES7331-7KF02-0AB0, supports thermocouples, RTDs, voltage, current, and resistance inputs, 40 x 125 x 117 mm.

$66.66Ref. price · indicative, final on quote
Siemens 6ES7331-7KF02-0AB0 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

6ES7331-7KF02-0AB0 — Inputs & Signal Ranges
ParameterValue
Number of analog inputs8
Current input rangeYes
Voltage input rangeYes
Resistance measuring rangesYes
RTD support (resistance thermometer)Yes
Thermocouple support (types)Yes
Input range: 0 to 20 mAYes
Input range: 4 to 20 mAYes
Input range: -10 to +10 VYes
Input range: -5 to +5 VYes
Input range: -80 to +80 mVYes
Input range: 0 to 600 OhmYes
RTD type: Pt100Yes; Standard
RTD type: Pt200No
Current measurement: 2-wire transducerYes
Current measurement: 4-wire transducerYes
Input resistance (0 to 20 mA)25 Ω
Input resistance (4 to 20 mA)25 Ω
Input resistance (-10 to +10 V)100 kΩ
Permissible input voltage, max. (destruction limit)20 V; continuous; 75 V for max. 1 s (mark to space ratio 1:20)
Permissible input current, max. (destruction limit)40 mA
Max. shielded signal cable length200 m; 50 m at 80 mV and thermocouples
6ES7331-7KF02-0AB0 — Measurement Performance
ParameterValue
Resolution (bit incl. sign), max.15 bit; Unipolar: 9/12/12/14 bit; bipolar: 9 bit + sign/12 bit + sign/12 bit + sign/14 bit + sign
Voltage measurement error (±)0.6 %; ±0.4 % (250 mV to 1 000 mV); ±0.6 % (2.5 mV to 10 mV); ±0.7 % (80 mV)
Current measurement error (±)0.5 %; 3.2 to 20 mA
Interference voltage suppression (at interference frequency)400 / 60 / 50 / 10 Hz
6ES7331-7KF02-0AB0 — Diagnostics & Monitoring
ParameterValue
Diagnostic alarmYes; Parameterizable, channels 0 and 2
Diagnostics functionYes; Parameterizable
Limit value alarmYes; Parameterizable
6ES7331-7KF02-0AB0 — Isolation
ParameterValue
Isolation: channels to backplane busYes
Isolation: between channelsNo
Isolation test voltage500 V DC
6ES7331-7KF02-0AB0 — Power
ParameterValue
Rated value (DC)24 V
Power loss, typ.1 W
Reverse polarity protectionYes
6ES7331-7KF02-0AB0 — Mechanical
ParameterValue
Required front connector20-pin
Width40 mm
Height125 mm
Depth117 mm
Weight, approx.250 g

Product details

8-channel analog input for S7-300 racks

The Siemens 6ES7331-7KF02-0AB0 is an 8-channel analog input module for the S7-300 programmable logic controller family. It accepts thermocouple, RTD, voltage, current, and resistance signals, making it a universal front-end for process and machine analog I/O.

Thermocouple and RTD input coverage

This module directly reads thermocouple types E, J, K, N, and L, covering the most common industrial temperature ranges for exhaust gas, furnace, and process monitoring. RTD support includes Pt100 and Ni100 standard curves. For current-loop signals, the module accepts 0 to 20 mA and 4 mA to 20 mA ranges, plus bipolar voltage spans from -10 V to +10 V and -5 V to +5 V. Resistance measurement is supported from 0 to 150 ohms, 0 to 300 ohms, and 0 to 600 ohms.

The module measures 40 mm wide, 125 mm high, and 117 mm deep, fitting a single S7-300 slot width on the standard DIN rail. The compact 40 mm width allows dense channel packing in multi-rack configurations.

Frequently asked questions

Does 6ES7331-7KF02-0AB0 support thermocouples?

Yes, the module reads thermocouple types E, J, K, N, and L directly, covering common industrial temperature sensing applications.

What RTD types does 6ES7331-7KF02-0AB0 accept?

The module accepts Pt100 and Ni100 standard RTD curves. It does not support Pt200, Pt500, Pt1000, Ni120, Ni200, Ni500, Ni1000, or LG-Ni1000.

MPN
6ES7331-7KF02-0AB0