Siemens 6ES7231-5PD32-0XB0 SM 1231 4-Channel 16-Bit RTD Input Module
A four-channel S7-1200 RTD module for supported resistance thermometers and resistance ranges.
Product Overview
6ES7231-5PD32-0XB0 is the SM 1231 RTD module with four resistance-temperature inputs. Siemens lists Pt, Ni, Cu and LG-Ni1000 sensor families along with resistance ranges, so the configured sensor curve is as important as the terminal assignment.
The module uses integrating conversion at up to 15-bit resolution plus sign. It supports readable diagnostics including supply monitoring and wire-break detection.
Siemens publishes 24 V DC rated supply, 40 mA typical input current, 80 mA typical backplane current and 1.5 W typical power loss.
Performance
RTD measurement
Acquires supported Pt, Ni, Cu and LG-Ni1000 resistance-temperature sensors.
Resistance acquisition
Supports published resistance ranges for approved non-temperature measurement use.
Sensor-curve conversion
Applies the configured sensor type so raw resistance is interpreted as the intended temperature value.
Diagnostic reporting
Provides wire-break, supply and channel-status information for maintenance.
Technical Details
- Manufacturer
- Siemens
- Exact model
- 6ES7231-5PD32-0XB0
- Designation
- SM 1231 AI 4x16 bit RTD
- Input channels
- 4
- Supported sensor families
- Pt, Ni, Cu, LG-Ni1000
- Examples
- Pt10 to Pt1000; Ni100 to Ni1000; Cu10 to Cu100
- Resistance ranges
- 0–150 Ω, 0–300 Ω, 0–600 Ω
- Resolution
- 15 bit + sign
- Rated supply
- 24 V DC
- Typical current
- 40 mA
- Backplane current
- 80 mA at 5 V DC
- Typical power loss
- 1.5 W
- Diagnostics
- Supply monitoring and wire break
- Protection
- IP20
About IndustryParts
https://www.industryparts.com/Exact-model handling for 6ES7231-5PD32-0XB0
IndustryParts keeps the complete model label, requested quantity, application evidence and delivery requirements together so the proposed supply can be checked against the installed system before dispatch.
System Integration
Identify sensor and wiring
Record the exact RTD curve, conductor count, compensation method, range and channel assignment.
Inspect low-level circuits
Check terminal tightness, lead continuity, shielding and separation from interference sources.
Validate temperature points
Compare each channel with a traceable resistance or temperature reference and document the as-left error.
Applications
Machine temperature monitoring
Reading supported resistance thermometers on bearings, motors or process equipment.
Resistance-based instrumentation
Acquiring approved low-resistance ranges in an S7-1200 station.
Four-channel RTD maintenance
Preserving sensor curves and wiring compensation during a controlled exchange.
FAQ
Which sensor details should accompany a 6ES7231-5PD32-0XB0 enquiry?
Provide each RTD type, conductor arrangement, temperature range, calibration requirement, terminal drawing and full module label.
Can a thermocouple be wired directly to 6ES7231-5PD32-0XB0?
No. This article is the RTD/resistance module; Siemens assigns thermocouples to the 5QD32 TC execution.
Why is the configured curve critical for 6ES7231-5PD32-0XB0?
Different Pt, Ni and Cu sensors have different resistance characteristics, so a wrong selection can produce plausible but incorrect temperatures.
Which diagnostics help service 6ES7231-5PD32-0XB0?
Siemens lists readable diagnostic functions including supply-voltage monitoring, wire break and channel status.
How is 6ES7231-5PD32-0XB0 commissioned after replacement?
Prove every used channel with traceable resistance or temperature points and verify scaling, alarms and wire-break response.
