6ES7231-5PA30-0XB0 SB 1231 RTD 1-Channel Analog Input Signal Board | Siemens

The Original New Siemens 6ES7231-5PA30-0XB0 SIMATIC S7-1200 SB 1231 RTD Analog Input Signal Board is a compact, high‑precision temperature measurement module that plugs directly into the CPU front slot. It provides a single 16‑bit channel for resistance temperature detectors (RTDs), supporting Pt100, Pt1000, Pt200, and Pt500 sensors with 2‑wire, 3‑wire, or 4‑wire connection. Ideal for high‑accuracy temperature recording in HVAC, machine control, and process applications without consuming additional cabinet space.

Core Engineering Highlights:
1-channel 16-bit RTD analog input | Pt100, Pt1000, Pt200, Pt500 support | 2/3/4-wire connection | 0.1°C / 0.1°F resolution | 24V DC supply | 0.5W power loss | 100 m shielded cable length | IP20 protection | –20°C to +60°C operating temperature | 38 x 62 x 21 mm

Key Features:

• Original New Siemens 6ES7231-5PA30-0XB0 signal board

• 1-channel analog input for resistance temperature detectors (RTDs)

• Supports Pt100, Pt1000, Pt200, and Pt500 sensors

• Supports 2-wire, 3-wire, and 4-wire RTD connections

• 16-bit resolution (15 bits + sign) for high-precision temperature measurement 

• Configurable temperature unit: degrees Celsius or degrees Fahrenheit 

• 24V DC supply voltage with 5 mA typical current consumption 

• 0.5 W typical power loss 

• 10 MΩ input resistance 

• Diagnostics: wire break detection and alarm capabilities 

• ±35V maximum permissible input voltage (destruction limit) 

• Plugs directly into the CPU front slot — no additional cabinet space required

• IP20 protection for control cabinet installation

• 100 m shielded twisted-pair cable length 

• Wide operating temperature: –20°C to +60°C (horizontal) 

• UL, CSA, FM, RCM, KC, and Marine approvals 

Applications:

• High-precision temperature measurement with Pt100 / Pt1000 sensors

• HVAC system temperature monitoring

• Machine bearing and winding temperature detection

• Process temperature control loops

• Retrofit and expansion of existing S7-1200 systems

• Small-scale temperature monitoring requiring minimal I/O expansion

Technical Specifications:

Power Supply:

Accuracy & Diagnostics:

Physical & Environmental:

System Compatibility:

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

• TIA Portal V11 or higher

• 2-wire, 3-wire, and 4-wire RTD sensors

Typical System Architecture:
24V DC Power Supply
↓
S7-1200 CPU (e.g., CPU 1214C DC/DC/DC)
│
├── 6ES7231-5PA30-0XB0 SB 1231 RTD Signal Board (plugs directly into CPU front slot)
│ ├── 1 x RTD Input → Pt100 / Pt1000 / Pt200 / Pt500 Sensor
│ ├── 2-wire / 3-wire / 4-wire Connection
│ └── 16-bit High-Precision Temperature Measurement
│
↓
TIA Portal Engineering (STEP 7 Basic / Professional)
↓
Temperature Monitoring and Control Application

Related Products:

• 6ES7231-5PA30-0XB0 – SB 1231 RTD (1-channel RTD signal board, current model)

• 6ES7231-5PD32-0XB0 – SM 1231 RTD (4-channel RTD input module)

• 6ES7231-5ND32-0XB0 – SM 1231 RTD (4-channel RTD input module, alternative)

• 6ES7214-1AG40-0XB0 – CPU 1214C DC/DC/DC (recommended CPU)

• 6ES7274-1XF30-0XA0 – SIMATIC Memory Card for S7-1200

• 6ES7290-6AA30-0XA0 – Simulation module for S7-1200 (optional)

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Siemens, SIMATIC, S7-1200, and TIA Portal are trademarks of Siemens AG.