Siemens 6ES7231-5PA30-0XB0 S7-1200 SB 1231 RTD Analog Input

Siemens SIMATIC S7-1200 SB 1231 RTD analog input signal board provides one channel for resistance temperature detector (RTD) sensors, supporting Pt100 and Pt1000. This compact plug-in module directly attaches to the CPU front, expanding analog measurement capability without increasing overall system footprint. Ideal for temperature measurement in HVAC, machine control, and process applications.

Applications:

• Temperature measurement with Pt100/Pt1000 sensors

• HVAC system temperature monitoring

• Machine bearing temperature detection

• Process temperature control loops

• Retrofit and expansion of existing S7-1200 systems

Technical Specifications:

• Number of inputs: 1 analog input (RTD)

• Supported sensor types: Pt100, Pt1000 (2-wire, 3-wire, 4-wire)

• Measuring range: -200°C to +850°C (Pt100), -200°C to +850°C (Pt1000)

• Resolution: 15 bits + sign

• Conversion time: Approx. 100 ms

• Measurement principle: Integrated sigma-delta converter

• Error limits: ±0.1°C typical

• Isolation: None (non-isolated)

• Supply voltage: From backplane bus (5V DC)

• Power loss: 1.1 W typical

• Dimensions (W x H x D): 38 mm x 62 mm x 21 mm

• Weight: Approx. 40 g

Compatibility:

• SIMATIC S7-1200 CPUs (all variants: 1211C, 1212C, 1214C, 1215C, 1217C)

• TIA Portal V11 or higher

Related Products (S7-1200 Signal Board Series):

• 6ES7231-4HD30-0XB0 – SB 1231 AI (1 x 0-10V analog input)

• 6ES7231-5PA30-0XB0 – SB 1231 RTD (current model)

• 6ES7231-5QA30-0XB0 – SB 1231 TC (thermocouple input)

• 6ES7232-4HA30-0XB0 – SB 1232 AQ (1 x 0-10V analog output)

For multi-channel RTD measurement, use SM 1231 RTD module (4 inputs).

Product Status:
Active product. Plugs into CPU front slot; no additional space required.

PLC ERA is an independent industrial automation distributor. Products are sourced through established supply channels and inspected prior to shipment. International shipping available.