About SIMATIC S7-1200, Analog input, SM 1231, 6ES7231-5ND32-0XB0

The SIMATIC S7-1200 Analog input module, SM 1231 (6ES7231-5ND32-0XB0), is designed for automation with a service period of 12 months. In a sleek grey color, it measures 45*100*75 mm and weighs 180g. Suitable for rack mounting, this module is ideal for various industrial applications.

Data Sheet 6ES7231-5ND32-0XB0

SIMATIC S7-1200, Analog Input Module SM 1231

• 4 AI, 10 V / 5 V / 2.5 V / 1.25 V or 020 mA / 420 mA

• 15 bit + sign bit resolution

General Information

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

Supply Voltage & Power

• Rated voltage: 24 V DC

• Typical current consumption: 65 mA

• Backplane bus 5 V DC, typ. 80 mA

• Power loss (typical): 1.8 W

Analog Inputs

• Number of inputs: 4 (current or voltage differential inputs)

• Voltage input (destruction limit): 35 V max

• Current input (destruction limit): 40 mA max

• Cycle time (all channels): max. 100 s

Input Ranges

• Voltage: 10 V, 5 V, 2.5 V, 1.25 V

  • Input resistance: 1 M

• Current: 020 mA, 420 mA

• Thermocouple / RTD / Resistance: Not supported

Analog Value Generation

• Resolution with overrange: 15 bit + sign

• Integration time: parameterizable

• Interference suppression: 40 dB (DC60 V, 50/60 Hz)

Smoothing

• Parameterizable: Yes

• Steps: None / Low / Medium / High

Accuracy & Errors

• Temperature error (25 C): 0.1% / 0.3% of total range

• Basic error limit at 25 C:

  • Voltage: 0.1%

  • Current: 0.1%

• Common mode voltage: max. 12 V

Diagnostics & Status

• Diagnostics function: Yes

• Diagnostic alarm: Yes

• Monitoring: Supply voltage, wire-break

• LEDs: Input status, maintenance

Protection & Standards

• IP20 degree of protection

• CE, CSA, UL, cULus, FM, RCM, KC, Marine approvals

Environmental / Ecological

• Environmental product declaration: Yes

• Global warming potential:

  • Total: 43.1 kg CO eq

  • Production: 7.62 kg

  • Operation: 36 kg

  • End-of-life: -0.544 kg

Ambient Conditions

• Operating temperature: -20 C to 60 C (horizontal), max. 50 C (vertical)

• Storage temperature: -40 C to 70 C

• Air pressure: 7951080 hPa (operation), 6601080 hPa (storage)

• Relative humidity: 95% without condensation

• Pollutant concentrations: SO <0.5 ppm, HS <0.1 ppm

Mechanical / Connection

• Required front connector: Yes

• Enclosure material: Plastic

Dimensions & Weight

• Width: 45 mm

• Height: 100 mm

• Depth: 75 mm

• Weight: 180 g 

Technical Details