Product Description
Key Features
- Product identity: SM 1231, AI 4×16 bit RTD module based on 6ES7231-5PD32-0XB0.
- RTD inputs: 4 analog inputs for resistance thermometers, including Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, and LG-Ni1000.
- Supply and consumption: Rated supply: 24 V DC. Current consumption: 40 mA typical; 80 mA typical from the backplane bus 5 V DC.
- Measurement resolution: Resolution with overrange: 15 bit; + sign. Measurement units are adjustable in degrees Celsius or degrees Fahrenheit.
- Diagnostics: Alarms, readable diagnostics, supply-voltage monitoring, wire-break detection, and input-status and maintenance LEDs are supported.
- Environmental variant: Conformal coating is provided, with operation from -20 °C to 60 °C and IP20 protection.
Applications
- Resistance-thermometer measurement: Measures temperature using supported resistance thermometers and provides adjustable Celsius or Fahrenheit units.
Technical Summary
| Product type | SM 1231, AI 4×16 bit RTD |
|---|---|
| Based on | 6ES7231-5PD32-0XB0 |
| Analog inputs | 4; Resistance thermometer |
| Rated supply | 24 V DC |
| Current consumption | 40 mA typical |
| Backplane bus consumption | 80 mA typical from backplane bus 5 V DC |
| Resolution | 15 bit; + sign |
| Diagnostics | Alarms, readable diagnostics, supply-voltage monitoring, and wire-break detection |
| Protection | IP20 |
| Operating temperature | -20 °C; = Tmin (incl. condensation/frost); start-up @ 0 °C to 60 °C; = Tmax |
| Lifecycle | Active Product |
Frequently Asked Questions
How can I verify that 6AG1231-5PD32-4XB0 matches an installed part?
Confirm the complete order number 6AG1231-5PD32-4XB0, the SM 1231, AI 4×16 bit RTD designation, and the based-on code 6ES7231-5PD32-0XB0.
What supply does this Siemens module require?
The rated supply is 24 V DC. Current consumption is 40 mA typical, with 80 mA typical from the backplane bus 5 V DC.
How many RTD inputs does it have?
It has 4 analog inputs for resistance thermometers.
What temperature range is specified for operation?
The ambient operating temperature is -20 °C; = Tmin (incl. condensation/frost); start-up @ 0 °C to 60 °C; = Tmax.
