Key Features
- 8 analog inputs for RTD measurement: SM 1231, AI 8×16 bit RTD with 8 analog inputs for resistance thermometer signals.
- Conformal coating for the SIPLUS version: SIPLUS S7-1200 module with conformal coating.
- 24 V DC supply and low power loss: Rated value (DC): 24 V. Power loss, typ.: 1.5 W.
- Operation at extreme temperatures: Ambient temperature during operation: -40 °C to 70 °C. Start-up at -25 °C.
Technical Summary
| Product type designation | SM 1231, AI 8×16 bit RTD |
|---|---|
| based on | 6ES7231-5PF32-0XB0 |
| Rated value (DC) | 24 V |
| Current consumption, typ. | 40 mA |
| from backplane bus 5 V DC, typ. | 80 mA |
| Power loss, typ. | 1.5 W |
| Number of analog inputs | 8; Resistance thermometer |
| Resistance thermometer input range | Yes; Resistance-type transmitter: Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, LG-Ni1000 |
| Resolution with overrange (bit including sign), max. | 15 bit; + sign |
| Interference voltage suppression | 85 dB at 50 / 60 / 400 Hz |
| IP degree of protection | IP20 |
| Ambient temperature during operation | -40 °C; = Tmin (incl. condensation/frost); start-up @ -25 °C |
Applications
- Resistance thermometer input reading: Reading resistance thermometer signals through the 8 analog inputs.
Frequently Asked Questions
What is the exact Siemens model of this RTD module?
6AG1231-5PF32-2XB0, SIPLUS S7-1200 SM 1231 RTD.
How many analog inputs does this module have?
It has 8 analog inputs.
What supply voltage does it use?
Rated value (DC): 24 V.
What temperature range is supported during operation?
Ambient temperature during operation: -40 °C to 70 °C; start-up at -25 °C.
What protection rating is listed for the module?
IP degree of protection: IP20.
