Product Overview
Technical Summary
| Product designation | SM 1231, AI 4×16 bit RTD |
|---|---|
| Product basis | 6ES7231-5PD32-0XB0 |
| Analog inputs | 4; Resistance thermometer |
| Rated supply voltage | 24 V DC |
| Typical input current | 40 mA |
| Typical backplane bus current at 5 V DC | 80 mA |
| Resolution with overrange | 15 bit; + sign |
| Operating temperature | -20 °C to 60 °C |
| IP degree of protection | IP20 |
| Required connection | Front connector |
Key Features
- Product designation: SM 1231, AI 4×16 bit RTD module for resistance thermometers.
- Analog inputs: 4 analog inputs; resistance thermometer input range supports Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, and LG-Ni1000.
- Supply and consumption: Rated supply voltage: 24 V DC. Typical input current: 40 mA; typical current consumption from the backplane bus at 5 V DC: 80 mA.
- Conformal coating: Conformal coating is supplied with Class 2 high-reliability coating according to EN 61086 and Type 1 protection against fouling according to EN 60664-3.
- Operating conditions: Ambient temperature during operation: -20 °C to 60 °C. IP degree of protection: IP20.
- Connection and dimensions: Required front connector. Dimensions: 45 mm width, 100 mm height, and 75 mm depth; weight approx. 220 g.
Applications
- Resistance thermometer measurement: The module measures temperature using resistance thermometers, with the technical unit adjustable to Degrees Celsius or Degrees Fahrenheit.
Frequently Asked Questions
What does Siemens order number 6AG1231-5PD32-4XB0 identify?
It identifies a SIPLUS S7-1200 SM 1231 analog input module with 4×16 bit RTD inputs and conformal coating.
Which specifications distinguish this MLFB variant?
Key distinguishing facts are the 4 resistance thermometer inputs, 24 V DC rated supply, -20 °C to 60 °C operating temperature, conformal coating, and IP20 protection.
What should be checked against the code and nameplate?
Check the complete order number 6AG1231-5PD32-4XB0, the SM 1231 designation, AI 4×16 bit RTD specification, input count, supply voltage, and variant-defining coating.
What information is needed for a quotation?
Provide the required quantity and destination together with the complete order number 6AG1231-5PD32-4XB0.
