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The Siemens 6ES7231-7PC22-0XA0 is a 4-channel RTD (Resistance Temperature Detector) analog input expansion module from the SIMATIC S7-200 product line. It is designed exclusively for use with S7-22X CPUs and provides high-precision temperature measurement for a wide range of resistance sensors. This module is not compatible with S7-200 SMART controllers.
Item No :
6ES7231-7PC22-0XA0Order(MOQ) :
1Payment :
EXWProduct Origin :
GermanyShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.126kgSpecifications
6ES7231-7PC22-0XA0 SIMATIC S7-200
| Origin | Germany |
| Net Weight (kg) | 0.126kg |
| Warranty |
1 year |
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1.How long is the delivery time?
If this item is in stock, it will take 2-3 working days to ship,
if it is not a conventional model,we will inform you of the specific delivery time.
2. Can you provide technical support?
We do not provide technical support.
But we have been working in this field for many years.
If you have any questions, please contact us and we will provide some constructive comments.
3. Can you provide warranty?
All parts we sell have one year warranty.
The Siemens 6ES7231-7PC22-0XA0 is deployed across small-scale industrial automation scenarios requiring multi-channel precision temperature measurement:
Multi-Point Temperature Monitoring: Connects multiple RTD sensors (Pt, Ni, Cu) to S7-200 controllers for temperature measurement in process control, HVAC, and industrial heating applications.
Legacy System Maintenance: Essential for maintaining existing S7-200 installations where RTD input channels require replacement. Platform migration would involve program rewriting and terminal redefinition, making direct replacement the practical choice.
Small Process Control: Suitable for temperature-dependent process automation tasks in food processing, packaging, and light manufacturing environments.
Sensor Integration: Enables direct connection of RTD sensors to S7-200 systems without additional signal conditioning or transmitters.
Q1: What is the primary function of the 6ES7231-7PC22-0XA0?
It is a 4-channel RTD analog input expansion module (EM 231 RTD) that converts RTD sensor signals into digital values for SIMATIC S7-200 controllers. It provides 15-bit + sign resolution and supports Pt, Ni, Cu, and resistance inputs .
Q2: Is this module compatible with S7-200 SMART controllers?
No. The 6ES7231-7PC22-0XA0 is designed exclusively for S7-22X CPUs. It is not compatible with S7-200 SMART controllers .
Q3: What is the lifecycle status of this product?
The module was discontinued on January 10, 2022. It is classified as PM490: Product cancellation / full stop delivery. Siemens states the product was deleted without replacement. New projects should not select this model; existing projects requiring spare parts must source from surplus or secondary markets .
Q4: What RTD sensor types does this module support?
The module supports a wide range of RTD types: Pt-100/200/500/1000/10000Ω, Ni-100/120/1000Ω, Cu-10Ω, and resistance inputs in the 150/300/600Ω range. All supported types are selectable via DIP switches .
Q5: What is the resolution and update time?
The module features 15-bit + sign resolution (16-bit including sign) with temperature resolution of 0.1°C/0.1°F. Update time for all channels is 810 ms (1400 ms with Pt10000) .
Q6: What is the country of origin and weight?
The module is manufactured in China with a net weight of approximately 177 g .
Q7: What is the difference between the 4-channel and 2-channel EM 231 RTD modules?
The 6ES7231-7PC22-0XA0 is the 4-channel version. The 6ES7231-7PB22-0XA0 is the 2-channel version. Both support the same RTD types and use identical DIP switch settings for configuration .
Q8: What is the power loss and backplane current?
The module has a typical power loss of 1.8 W and draws 87 mA from the 5V DC backplane bus .
| Model | Description |
|---|---|
| 6ES7231-7PB22-0XA0 | EM 231 RTD module with 2-channel RTD support; same sensor types, half the channels |
| 6ES7231-0HF22-0XA0 | EM 231 analog input module with 8-channel voltage/current input for process signals |
| 6ES7235-0KD22-0XA8 | EM 235 analog combination module with 4 AI / 1 AO for integrated analog I/O |
| S7-200 SMART | Modern replacement platform; consult Siemens for migration guidance from S7-200 |
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