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Siemens 6ES7231-5QD32-0XB0 — Analog Input Modules

Siemens 6ES7231-5QD32-0XB0 SM 1231 TC Analog Input Module

Name: 6ES7231-5QD32-0XB0
Brand: Siemens
SKU: 6ES7231-5QD32-0XB0
Availability: LimitedAvailability
Author: Calibration Cal

MPN6ES7231-5QD32-0XB0

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Siemens SM 1231 TC analog input module, 6ES7231-5QD32-0XB0, 8 thermocouple inputs, ±80 mV range, 24 V DC, active production.

$234.95 – $630.39Ref. price · indicative, final on quote

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Siemens 6ES7231-5QD32-0XB0 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7231-5QD32-0XB0 — Inputs & Signal Ranges
Parameter	Value
Number of analog inputs	4; Thermocouples
Current input range	No
Voltage input range	Yes
Resistance measuring ranges	No
RTD support (resistance thermometer)	No
Thermocouple support (types)	Yes; J, K, T, E, R, S, N, C, TXK/XK(L); voltage range: ±80 mV
Input range: -80 to +80 mV	Yes
Permissible input voltage, max. (destruction limit)	±35 V

6ES7231-5QD32-0XB0 — Measurement Performance
Parameter	Value
Resolution (bit incl. sign), max.	15 bit; + sign
Measurement principle	integrating
Temperature measurement error (±)	25 °C ±0.1%, to 55 °C ±0.2% total measurement range
Interference voltage suppression (at interference frequency)	85 dB at 50 / 60 / 400 Hz
Common-mode interference suppression, min.	120 dB

6ES7231-5QD32-0XB0 — Diagnostics & Monitoring
Parameter	Value
Wire-break detection	Yes
Diagnostic alarm	Yes
Diagnostics function	Yes; Can be read out
Supply voltage monitoring	Yes

6ES7231-5QD32-0XB0 — Power
Parameter	Value
Rated value (DC)	24 V
Power loss, typ.	1.5 W

6ES7231-5QD32-0XB0 — Environmental
Parameter	Value
Operating temperature, horizontal mounting, max.	60 °C
Operating temperature, horizontal mounting, min.	-20 °C
Operating temperature, vertical mounting, max.	50 °C
Operating temperature, vertical mounting, min.	-20 °C

6ES7231-5QD32-0XB0 — Mechanical
Parameter	Value
Required front connector	Yes
Width	45 mm
Height	100 mm
Depth	75 mm
Weight, approx.	180 g

Product details

Thermocouple input module for S7-1200

The Siemens 6ES7231-5QD32-0XB0 is an SM 1231 TC analog input module for the S7-1200 controller family. It accepts eight thermocouple inputs across types J, K, T, E, R, S, N, and C, with a voltage range of ±80 mV per the datasheet. The module is parameterizable — you configure the thermocouple type, wire-break detection, and diagnostic alarms per channel in the TIA Portal hardware config.

Operating environment and approvals

The 24 V DC supply draws a typical 1.5 W — negligible thermal load inside a crowded enclosure. Dimensions are 45 mm wide by 100 mm high by 75 mm deep, fitting the standard S7-1200 DIN-rail footprint with no extra clearance needed on the sides. Carries CE, cULus, UL, CSA, FM, KC, and marine approvals — covers most industrial and marine classification society requirements without a separate certification run.