Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SM 1231, AI 8×16 bit RTD |
| Analog inputs | 8; Resistance thermometer |
| Rated supply voltage | 24 V DC |
| Typical current consumption | 40 mA |
| Backplane bus current consumption | 80 mA at 5 V DC |
| Resistance-thermometer types | Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, LG-Ni1000 |
| Resistance ranges | 150 Ω, 300 Ω, 600 Ω |
| Resolution with overrange | 15 bit; + sign |
| Common mode interference, min. | 120 dB |
| Protection | IP20 |
Applications
- Temperature measurement: Measures temperature with resistance thermometers using selectable degrees Celsius or degrees Fahrenheit.
- Resistance measurement: Measures resistance through supported resistance-thermometer and resistor input ranges.
Key Features
- 8 RTD analog inputs: Provides 8 analog inputs for resistance thermometers, including Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, and LG-Ni1000.
- Resistance ranges: Supports resistance measurement at 150 Ω, 300 Ω, and 600 Ω, plus rated resistor ranges from 0 to 150 ohms, 0 to 300 ohms, and 0 to 600 ohms.
- Resolution and measurement: Uses an integrating measurement principle and provides up to 15-bit resolution with overrange, including sign. Integration time is not parameterizable.
- Supply and diagnostics: Has a 24 V rated DC supply, typical current consumption of 40 mA, wire-break monitoring, supply-voltage monitoring, diagnostic alarms, and input-status LEDs.
Frequently Asked Questions
1. How many RTD channels does the Siemens 6ES7231-5PF32-0XB0 have?
It has 8 analog RTD inputs.
2. Which resistance thermometers are supported?
Supported types include Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, and LG-Ni1000.
3. What supply voltage does the module require?
The rated DC supply voltage is 24 V.
4. What diagnostics are available?
The module has diagnostic alarms, readable diagnostics, supply-voltage monitoring, wire-break monitoring, and LEDs for input status and maintenance.
