Siemens 6ES7231-7PB22-0XA8 SIMATIC S7-200 CN EM 231 Analog Input Module RTD Temperature Module
The Siemens 6ES7231-7PB22-0XA8 EM231 RTD module is an expansion module for SIMATIC S7-200 CN PLC. It is specially designed for temperature signal acquisition from RTD (Resistance Temperature Detector) sensors such as Pt100, Pt1000, Cu50. This module converts the resistance signal of temperature sensors into digital data for the S7-200 main CPU, to realize real-time temperature monitoring, data recording and temperature closed-loop control. It is widely used to collect temperature signals in automation systems and expand the analog input capability of S7-200 PLC.
Dedicated RTD Temperature Acquisition Supports multiple RTD types: Pt100, Pt1000, Cu50, Ni100 etc. Direct temperature reading without extra signal converter.
High Precision Measurement High resolution for temperature detection, stable anti-interference performance, suitable for industrial field harsh environment.
Easy PLC Expansion Designed for SIMATIC S7-200 CN CPU. Quick plug-on installation on S7-200 PLC backplane, no extra wiring adapter required.
Multiple Temperature Ranges Selectable Configurable measuring range via PLC program, flexible for different temperature monitoring requirements.
Simple Wiring & Commissioning Terminal block design for easy sensor wiring. Simple parameter setup in Micro/WIN software.
Complete Protection & Stable Operation Built-in overvoltage, reverse connection protection. Suitable for continuous long-time running in industrial automation sites.
Global Certification & Original Quality Genuine Siemens product, meets IEC industrial standards, support export worldwide.
| Item | Specification |
|---|---|
| Model | 6ES7231-7PB22-0XA8 |
| Brand | Siemens |
| Series | SIMATIC S7-200 CN, EM231 RTD Expansion Module |
| Input Channels | 4 RTD input channels |
| Supported Sensor | Pt100, Pt1000, Cu50, Ni100 and other RTD sensors |
| Measurement Resolution | 15 bits + sign bit |
| Measuring Range | Configurable, e.g. -200℃ ~ +850℃ for Pt100 |
| Bus Connection | Directly connect to S7-200 PLC backplane |
| Power Supply | Powered by S7-200 PLC backplane |
| Installation | DIN rail mounting |
| Operating Temperature | 0℃ ~ +55℃ |
| Storage Temperature | -40℃ ~ +85℃ |
| Protection Class | IP20 |
| Software | Programming via STEP 7-Micro/WIN |
Temperature monitoring for oven, boiler, pipeline, cooling system, drying machine. Collect temperature data for PLC control system.