Technical Summary
| Product type designation | SM 1231, AI 4×16 bit |
|---|---|
| Rated value (DC) | 24 V |
| Number of analog inputs | 4; Current or voltage differential inputs |
| Cycle time (all channels) max. | 100 μs |
| Voltage input ranges | Yes; ±10V, ±5V, ±2.5V or ±1.25V |
| Current input ranges | Yes; 4 to 20 mA, 0 to 20 mA |
| Resolution with overrange (bit including sign), max. | 15 bit; + sign |
| Current consumption, typ. | 65 mA |
| from backplane bus 5 V DC, typ. | 80 mA |
| Power loss, typ. | 1.8 W |
| IP degree of protection | IP20 |
Key Features
SIMATIC S7-1200 analog input module
SM 1231 for the SIMATIC S7-1200 family.
SM 1231 for the SIMATIC S7-1200 family.
4 analog inputs
Provides 4 AI with current or voltage differential inputs.
Provides 4 AI with current or voltage differential inputs.
Selectable input ranges
Supports +/-10 V, +/-5 V, +/-2.5 V, +/-1.25 V, 0-20 mA, and 4-20 mA.
Supports +/-10 V, +/-5 V, +/-2.5 V, +/-1.25 V, 0-20 mA, and 4-20 mA.
15 bit+sign bit resolution
Resolution with overrange up to 15 bit; + sign.
Resolution with overrange up to 15 bit; + sign.
Diagnostics and alarms
Includes alarms, diagnostics function, diagnostic alarm, wire break monitoring, and monitoring the supply voltage.
Includes alarms, diagnostics function, diagnostic alarm, wire break monitoring, and monitoring the supply voltage.
IP20 protection
Degree of protection: IP20.
Degree of protection: IP20.
Applications
Analog signal acquisition in SIMATIC S7-1200 systems
Used for connecting current or voltage differential inputs to a SIMATIC S7-1200 controller.
Used for connecting current or voltage differential inputs to a SIMATIC S7-1200 controller.
Voltage and current measurement input integration
Supports integration of voltage and current signals within the listed input ranges.
Supports integration of voltage and current signals within the listed input ranges.
Frequently Asked Questions
What is Siemens 6ES7231-5ND32-0XB0?
It is a SIMATIC S7-1200 SM 1231 analog input module.
How many analog inputs does 6ES7231-5ND32-0XB0 provide?
It provides 4 analog inputs with current or voltage differential inputs.
Which input ranges does the SM 1231 AI 4×16 bit support?
It supports +/-10 V, +/-5 V, +/-2.5 V, +/-1.25 V, 0-20 mA, and 4-20 mA.
What are the electrical supply and consumption details for this module?
Rated value (DC) is 24 V, with current consumption of 65 mA typ. and 80 mA typ. from the backplane bus 5 V DC.
