Key ratings for fit
The 6ES7231-5QF30-0XB0: Rated over -40 to 70 °C with IP20 protection. Powered by 24 V DC, typical power loss 1.5 W. Includes diagnostics and alarms.
Siemens 6ES7231-5QF30-0XB0 SM 1231 AI 8xTC, 8 Thermocouple I
MPN6ES7231-5QF30-0XB0
Siemens SM 1231 AI 8xTC, 6ES7231-5QF30-0XB0, 8 thermocouple inputs, ±80 mV range, -40 to 70 °C, 24 V DC.
$722.11Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Inputs & Signal Ranges
| Parameter | Value |
|---|---|
| Number of analog inputs | 8; Thermocouples |
| Resistance measuring ranges | Yes |
| 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 |
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 |
Diagnostics & Monitoring
| Parameter | Value |
|---|---|
| Wire-break detection | Yes |
| Diagnostic alarm | Yes |
| Diagnostics function | Yes; Can be read out |
| Supply voltage monitoring | Yes |
Power
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Power loss, typ. | 1.5 W |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature, horizontal mounting, max. | 55 °C |
| Operating temperature, horizontal mounting, min. | 0 °C |
| Operating temperature, vertical mounting, max. | 45 °C |
| Operating temperature, vertical mounting, min. | 0 °C |
Mechanical
| Parameter | Value |
|---|---|
| Required front connector | Yes |
| Width | 45 mm |
| Height | 100 mm |
| Depth | 75 mm |
| Weight, approx. | 220 g |
Product details
Frequently asked questions
What are its key ratings?
8 thermocouple inputs supporting J, K, T, E, R, S, N, C, ±80 mV range, -40 to 70°C, 24 V DC, IP20, 1.5 W typical power loss.
MPN
6ES7231-5QF30-0XB0