SIEMENS 6ES7231-7PC22-0XA0 RTD/Thermocouple Analog Input Module – S7-200 SMART Series
When a temperature sensor signal goes unread — whether from a furnace, a reactor, or a precision drying line — the consequences cascade fast: product defects, equipment damage, unplanned downtime, and safety incidents. The analog input module is the critical bridge between field-level sensors and the PLC’s decision logic. Without a reliable, high-accuracy RTD/TC input module, your entire closed-loop temperature control strategy collapses.
The SIEMENS 6ES7231-7PC22-0XA0 is a dedicated 2-channel RTD and thermocouple analog input module engineered for the S7-200 SMART platform — Siemens’ flagship compact PLC series for small-to-medium automation applications. This module occupies a specialized position in the S7-200 SMART expansion lineup: it is the go-to solution for high-precision thermal measurement in applications where standard ±10V or 4–20mA analog inputs are insufficient. Globally, the S7-200 SMART series is deployed across hundreds of thousands of machines in packaging, food processing, HVAC, and light manufacturing, making this module one of the most widely sourced expansion cards in the industrial automation aftermarket.
Technical Specifications
- Part Number / SKU: 6ES7231-7PC22-0XA0
- Series: SIMATIC S7-200 SMART
- Module Type: Analog Input — RTD & Thermocouple (TC)
- Number of Channels: 2 (configurable per channel)
- Supported Sensor Types: PT100, PT1000, Ni100, Ni1000 (RTD); Type B, E, J, K, N, R, S, T (TC)
- Measurement Range: RTD: −200°C to +850°C; TC: varies by type (e.g., Type K: −270°C to +1372°C)
- Resolution: 0.1°C / 0.1°F
- Accuracy: ±0.1% full scale (typical)
- Conversion Time: 405 ms per channel
- Wire Connection: 2-wire, 3-wire, 4-wire RTD; 2-wire TC
- Power Supply: 5 VDC (supplied via S7-200 SMART CPU bus)
- Isolation: 500 VAC field-to-logic isolation
- Operating Temperature: 0°C to +55°C
- Storage Temperature: −40°C to +70°C
- Dimensions (W×H×D): 45 mm × 100 mm × 81 mm
- Weight: Approx. 160 g
- Certifications: CE, UL, cULus, FM, ATEX (refer to Siemens datasheet for full list)
- Compatible CPU: S7-200 SMART ST20, ST30, ST40, ST60, SR20, SR30, SR40, SR60
Key Features & Benefits
- Dual-channel flexibility: Each channel independently configurable for RTD or TC sensor type, eliminating the need for separate modules in mixed-sensor applications.
- High measurement accuracy: ±0.1% full-scale accuracy ensures reliable closed-loop temperature control in demanding processes.
- Wide sensor compatibility: Supports the most common industrial RTD and thermocouple standards, reducing procurement complexity.
- Open-circuit & short-circuit detection: Built-in diagnostics flag sensor faults in real time, enabling predictive maintenance workflows.
- Plug-and-play expansion: Connects directly to the S7-200 SMART CPU expansion bus — no additional power supply or interface card required.
- Compact DIN-rail form factor: 45 mm width minimizes panel space consumption in space-constrained control cabinets.
- Cold junction compensation: Automatic CJC for thermocouple channels eliminates the need for external compensation hardware.
Industry & Equipment Applications
- Food & Beverage: Pasteurization lines, sterilization tunnels, baking ovens, fermentation temperature monitoring
- Plastics & Rubber: Injection molding barrel temperature control, extruder zone management
- HVAC & Building Automation: Chiller plant monitoring, air handling unit control, boiler management
- Pharmaceutical: Autoclave validation, clean room temperature logging, lyophilizer control
- Metallurgy & Heat Treatment: Furnace zone control, annealing line temperature profiling
- Chemical Processing: Reactor temperature monitoring, distillation column control
- Water & Wastewater: Sludge digester temperature, heat exchanger monitoring
System Integration & Compatible Parts
The 6ES7231-7PC22-0XA0 integrates seamlessly within the S7-200 SMART ecosystem. Typical system configurations include:
- Compatible CPUs: 6ES7288-1ST20-0AA0, 6ES7288-1ST30-0AA0, 6ES7288-1SR40-0AA0, 6ES7288-1SR60-0AA0
- Standard Analog Input Modules: 6ES7231-4HD32-0XB0 (4AI ±10V/4–20mA), 6ES7231-4HF32-0XB0 (8AI)
- Analog Output Modules: 6ES7232-4HB32-0XB0 (2AO), 6ES7232-4HD32-0XB0 (4AO)
- Digital I/O Expansion: 6ES7223-1BH32-0XB0 (8DI/8DO)
- Programming Software: STEP 7-Micro/WIN SMART V2.6 or later
- Communication: Ethernet port on CPU (Modbus TCP, S7 protocol, OPC UA via CPU firmware)
Our Quality Assurance Process
At Konmask.com, every SIEMENS module undergoes a rigorous multi-stage verification process before shipment:
- Authenticity Verification: Cross-referenced against Siemens factory serial number databases and holographic label inspection.
- Visual Inspection: 100% inspection for physical damage, connector integrity, and label completeness.
- Functional Pre-check: Power-on test and communication handshake verification where applicable.
- Packaging: Anti-static ESD packaging with desiccant, foam cushioning, and tamper-evident sealing.
- Documentation: Original Siemens datasheet, CE declaration of conformity, and Konmask inspection report included.
How to Order
- Submit your inquiry via the Contact Us form or email support@konmask.com with your required quantity and delivery timeline.
- Receive a formal quotation within 24 business hours including unit price, lead time, and shipping options.
- Confirm the order via Purchase Order (PO) or proforma invoice.
- Payment via T/T (bank transfer), PayPal, or other agreed terms.
- Shipment via DHL, FedEx, UPS, or sea freight — with full tracking and export documentation.
Why Choose Konmask.com?
- ✅ Specialized in industrial automation components — PLC, DCS, HMI, drives, and sensors from leading global brands.
- ✅ Genuine parts guaranteed — every unit traceable and verified before dispatch.
- ✅ Global B2B export experience — serving OEMs, system integrators, and MRO buyers in 50+ countries.
- ✅ Fast response — dedicated technical sales team responds within 24 hours.
- ✅ Flexible MOQ — single-unit orders accepted for urgent replacement needs.
- ✅ Competitive pricing — direct sourcing relationships enable cost-effective procurement.
Frequently Asked Questions
- Q: Is the 6ES7231-7PC22-0XA0 compatible with S7-200 (classic) CPUs?
- A: No. This module is designed exclusively for the S7-200 SMART platform. It is not compatible with the legacy S7-200 series. For S7-200 classic, you would need the EM 231 TC module (6ES7231-5QD32-0XB0 equivalent).
- Q: Can both channels be used simultaneously with different sensor types?
- A: Yes. Each channel is independently configurable in STEP 7-Micro/WIN SMART software. Channel 0 can be set to PT100 RTD while Channel 1 is configured for Type K thermocouple, for example.
- Q: What is the maximum number of 6ES7231-7PC22-0XA0 modules that can be connected to one CPU?
- A: The S7-200 SMART CPU supports up to 6 expansion modules in total. The exact combination depends on the CPU model and total I/O count. Refer to the S7-200 SMART system manual for configuration limits.
- Q: Do you provide a warranty on this module?
- A: Yes. Konmask.com provides a 12-month warranty against manufacturing defects on all genuine Siemens modules. Contact support@konmask.com for warranty claims.
- Q: How long does international shipping take?
- A: Express courier (DHL/FedEx) typically delivers within 3–7 business days worldwide. Sea freight options are available for bulk orders. Lead time depends on stock availability — please inquire for current status.
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Original Source: https://Konmask.com
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