SIMATIC S7-1200 SM 1231 Thermocouple and RTD (Pt100) Temperature Module is an analog input module for accurate temperature measurement, available as 4- and 8-channel TC and RTD versions. It supports thermocouple types J, K, T, E, R, S and N, also measures low-level ±80 mV signals, and is available as a SIPLUS variant.
Technical data
| Product | SM 1231 TC / RTD |
|---|---|
| Product family | SIMATIC S7-1200 |
| Description | Thermocouple and Pt100/Pt1000 temperature measuring modules; direct sensor connection for furnace temperature control |
| Example version | SM 1231 thermocouple module SIMATIC S7-1200, analog input, SM 1231 TC 4 AI thermocouples |
| Programming | STEP 7 (TIA Portal) |
Article numbers
| Version | Description | Article No. |
|---|---|---|
| Standard | SM 1231 thermocouple module SIMATIC S7-1200, analog input, SM 1231 TC 4 AI thermocouples | 6ES7231-5QD32-0XB0 |
| Standard | SIMATIC S7-1200, analog input, SM 1231 TC 8 AI thermocouples | 6ES7231-5QF32-0XB0 |
| Standard | SM 1231 RTD signal module SIMATIC S7-1200, analog input, SM 1231 RTD 4xAI RTD module | 6ES7231-5PD32-0XB0 |
| Standard | SIMATIC S7-1200, analog input, SM 1231 RTD 8xAI RTD module | 6ES7231-5PF32-0XB0 |
| SIPLUS | SIPLUS SM 1231 thermocouple module (Extended temperature range and exposure to environmental substances) Range of ambient temperature -40 ... +70 °C 8 inputs +/- 80 mV, resolution 15-bit + sign, thermocouple types J, K, T, E, R, S, N, C, TXK/XK(L) | 6AG1231-5QF32-4XB0 |
| SIPLUS | 4 inputs +/- 80 mV, resolution 15-bit + sign, thermocouple types J, K, T, E, R, S, N, C, TXK/XK(L) | 6AG1231-5QD32-4XB0 |
| SIPLUS | SIPLUS SM 1231 RTD signal module (Extended temperature range and exposure to environmental substances) 4 inputs for resistance temperature sensors Pt10/50/100/200/500/1000, Ni100/120/200/500/1000, Cu10/50/100, LG- Ni1000; resistance 150/300/600 Ohm, resolution 15-bit + sign • For areas with extreme exposure to environmental substances (conformal coating); ambient temperature -20 ... +60 °C | 6AG1231-5PD32-4XB0 |
| SIPLUS | • For areas with extreme exposure to environmental substances (conformal coating); ambient temperature -40 ... +70 °C | 6AG1231-5PD32-2XB0 |
| SIPLUS | 8 inputs for resistance temperature sensors Pt10/50/100/200/500/1000, Ni100/120/200/500/1000, Cu10/50/100, LG- Ni1000; resistance 150/300/600 Ohm, resolution 15-bit + sign • For areas with extreme exposure to environmental substances (conformal coating); ambient temperature -20 ... +60 °C | 6AG1231-5PF32-4XB0 |
| SIPLUS | • For areas with extreme exposure to environmental substances (conformal coating); ambient temperature -40 ... +70 °C | 6AG1231-5PF32-2XB0 |
Technical data and article numbers are based on Siemens catalog ST 70 · 2026 (chapter SIMATIC S7-1200) and are for information only. Image is representative.
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Tags: SM 1231 TC / RTD, siemens s7-1200, simatic plc, sm 1231 tc / rtd, 6ES7231-5QD32-0XB0, 6ES7231-5QF32-0XB0, 6ES7231-5PD32-0XB0, 6ES7231-5PF32-0XB0, 6AG1231-5QF32-4XB0, 6AG1231-5QD32-4XB0, 6AG1231-5PD32-4XB0, 6AG1231-5PD32-2XB0, 6AG1231-5PF32-4XB0, 6AG1231-5PF32-2XB0