About Siemens S71200 SM1231 8 AI RTD Expansion Module

Siemens S7-1200 SM1231 8 AI RTD Expansion Module

The Siemens S7-1200 SM1231 8 AI RTD expansion module by Naksh Technology Solution LLP is designed to extend the analog input capabilities of the S7-1200 PLC system.

Key Details:

• Provides 8 RTD (Resistance Temperature Detector) inputs

• Enables accurate temperature measurement in industrial applications

• Supports multiple RTD types for flexible temperature monitoring

• Easily integrates with TIA Portal for simplified configuration and programming

• Ideal for manufacturing, HVAC, and process automation

• Ensures reliable temperature data acquisition for temperature-sensitive processes

SIPLUS S7-1200 SM 1231 RTD Module

• Article No.: 6AG1231-5PD32-2XB0
• Based on: 6ES7231-5PD32-0XB0
• Type: 4-channel analog input module (RTD)
• Operating temperature: -40+70 C (start-up -25 C)
• Conformal coating: Yes (for high reliability)

General Information

• Product type: SM 1231, AI 4x16 bit RTD

• Supply voltage: 24 V DC

• Current consumption:

  • Typ. 40 mA (module)

  • From backplane bus 5 V DC: Typ. 80 mA

• Power loss: Typ. 1.5 W

Analog Inputs

• Number of inputs: 4 (Resistance Thermometers RTD)

• Voltage input limit: 35 V (destruction limit)

• Measurement units: C / F

• Supported RTD types:

  • Pt10, Pt50, Pt100, Pt200, Pt500, Pt1000

  • Ni100, Ni120, Ni200, Ni500, Ni1000

  • Cu10, Cu50, Cu100, LG-Ni1000

• Supported resistor ranges: 0150 , 0300 , 0600

• Thermocouple support: No

Analog Value Generation

• Measurement principle: Integrating

• Resolution: Max. 15 bit (including sign)

• Interference voltage suppression:

  • 85 dB at 50 / 60 / 400 Hz

  • Common mode min. 120 dB

Errors & Accuracy

• Temperature error: 0.1% / 0.3% of total measurement range

• Repeat accuracy (25 C): 0.05%

Diagnostics & Alarms

• Alarms: Yes

• Diagnostics: Readable, monitoring supply voltage and wire-break

• LEDs: For input status and maintenance

Protection & Standards

• Degree of protection: IP20

• Conformal coating standards: EN 61086, EN 60664-3, MIL-I-46058C, IPC-CC-830A

Environmental & Operational Conditions

• Ambient temperature (operation): -40+70 C (start-up -25 C)

• Ambient temperature (storage): -40+70 C

• Relative humidity: Max. 95% without condensation

• Altitude: Max. 5,000 m above sea level

• Resistant to: Coolants, lubricants, biologically active substances, chemically active substances (salt spray), mechanically active substances (dust, sand)

• Conformal coating: Class 2, protects against fouling and discoloration

Mechanics / Dimensions

• Enclosure material: Plastic (front)

• Width Height Depth: 45 100 75 mm

• Weight: 220 g 

Technical Details