Siemens 6ES7231-7PB22-0XA0 SIMATIC S7-200 Analog Input EM 231 RTD Module

Siemens 6ES7231-7PB22-0XA0 SIMATIC S7-200 Analog Input EM 231 RTD Module

The Siemens 6ES7231-7PB22-0XA0 is a 2-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 Pt, Ni, and Cu resistance sensors. This module is not compatible with S7-200 SMART controllers .

Item No :
6ES7231-7PB22-0XA0
Order(MOQ) :
1
Payment :
EXW
Product Origin :
Germany
Shipping Port :
Wuhan, Hubei, China
Lead Time :
3-5 days
Weight :
0.126kg

Specifications

6ES7231-7PB22-0XA0 SIMATIC S7-200

Origin Germany

Net Weight (kg) 0.126kg

Warranty
1 year
Hot Selling Modules

Scope of supply
Our Services
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.
- 24x7 professional service team
- Sufficient inventory, large quantities in stock
- A variety of shipping methods are available
Application

The Siemens 6ES7231-7PB22-0XA0 is deployed across small-scale industrial automation scenarios requiring precision temperature measurement:

Temperature Monitoring and Control: Connects 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 simple temperature-dependent process automation tasks in food processing, packaging, and light manufacturing environments.

Sensor Integration: Enables direct connection of 2-wire, 3-wire, or 4-wire RTD sensors to S7-200 systems without additional signal conditioning or transmitters .

FAQ

Q1: What is the primary function of the 6ES7231-7PB22-0XA0?

It is a 2-channel RTD analog input expansion module (EM 231) 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 6ES7231-7PB22-0XA0 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 discontinuation. 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: Can I use the CN variant (6ES7231-7PB22-0XA8) as a replacement?

Yes, with a caveat. The CN variant (6ES7231-7PB22-0XA8) can directly replace the standard version 6ES7231-7PB22-0XA0. The main difference is that the CN variant lacks UL approval; it carries CE certification only. If your project does not require UL approval, the CN variant is a suitable replacement .

Q5: 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 .

Q6: What wiring configurations are supported?

The module supports 2-wire, 3-wire, and 4-wire RTD connections. The 4-wire configuration provides the highest accuracy by eliminating lead resistance errors .

Q7: What is the country of origin and weight?

The module is manufactured in Germany with a net weight of approximately 210 g .

Q8: What is the difference between the -7PB22-0XA0 and -7PD22-0XA0?

The -7PB22-0XA0 is the RTD input module (2 channels). The -7PD22-0XA0 is the thermocouple input module (4 channels). They serve different sensor types and are not interchangeable .