Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | SM 1231 RTD 4x 16 bit |
| Analog inputs | 4; Resistance thermometer |
| Supported resistance thermometers | Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100, LG-Ni1000 |
| Resistance ranges | 150 Ω, 300 Ω, 600 Ω |
| Supply voltage | 24 V DC rated; 20.4 V to 28.8 V DC permissible |
| Resolution | 15 bit with overrange, including sign |
| Integration time | Parameterizable |
| Diagnostics | Alarms, readable diagnostics, supply-voltage monitoring and wire-break detection |
| Isolation | Between analog inputs and electronics power supply; 707 V DC type test |
| Protection rating | IP20 |
| Sensor cable | Shielded, max. 100 m to the sensor |
Applications
- RTD temperature measurement: Measures temperature using resistance thermometers such as Pt100 and Pt1000, with the technical unit adjustable to degrees Celsius or degrees Fahrenheit.
Key Features
- 4 RTD analog inputs: Provides 4 analog inputs for resistance thermometers, including Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10, Cu50, Cu100 and LG-Ni1000.
- Resistance input ranges: Supports resistance ranges of 150 Ω, 300 Ω and 600 Ω, plus 0 to 150 ohms, 0 to 300 ohms and 0 to 600 ohms.
- 24 V DC supply: Rated supply voltage is 24 V DC, with a permissible range of 20.4 V to 28.8 V DC.
- Resolution and conversion: Resolution with overrange is 15 bit including sign. Integration time is parameterizable, and the measurement principle is integrating.
- Diagnostics and isolation: Provides alarms, readable diagnostics, supply-voltage monitoring, wire-break detection and DIAG LED indication. The analog inputs are separated from the electronics power supply.
- Protection and sensor cable: The protection rating is IP20. Shielded cable to the sensor can be up to 100 m.
Frequently Asked Questions
1. How many RTD inputs does Siemens 6ES7231-5PD50-0XB0 have?
It has 4 analog inputs for resistance thermometers.
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 supply voltage is 24 V DC, with a permissible range of 20.4 V to 28.8 V DC.
4. What diagnostics are available?
The module provides alarms, readable diagnostics, supply-voltage monitoring, wire-break detection and DIAG LED indication.
5. What should be verified before requesting a quote?
Verify the required RTD type, resistance range, supply voltage, sensor cable length and mounting details for the exact configuration.
