Key Features
- Analog input module: SM 1231 analog input module with 8 AI.
- Input capacity: 8x AI 14 bit ADC.
- Supported voltage ranges: +/-10 V, +/-5 V, +/-2.5 V.
- Supported current ranges: 0-20 mA and 4-20 mA.
- Supply voltage: 24 V DC rated value; permissible range 20.4 V to 28.8 V.
- Diagnostics and protection: Diagnostics function, diagnostic alarm, supply voltage monitoring, wire break, DIAG LED, and IP20.
Applications
- Analog signal acquisition: Acquires voltage and current analog signals through 8 inputs.
- PLC I/O expansion: Adds analog input capacity to a SIMATIC S7-1200 G2 system.
- Diagnostics-based monitoring: Supports diagnostics, supply voltage monitoring, and wire break detection for analog input channels.
Technical Summary
| Product type designation | SM 1231, AI 8x 14 bit |
|---|---|
| Number of analog inputs | 8; Current or voltage differential inputs |
| Input ranges, voltage | +/-10 V, +/-5 V, +/-2.5 V |
| Input ranges, current | 4 mA to 20 mA; 0 to 20 mA |
| Rated value (DC) | 24 V |
| Permissible range, lower limit (DC) | 20.4 V |
| Permissible range, upper limit (DC) | 28.8 V |
| Current consumption, typ. | 45 mA |
| from backplane bus 5 V DC, typ. | 75 mA |
| Power loss, typ. | 2.5 W |
| Cycle time (all channels) max. | 1.25 ms; at 400 Hz rejection |
| Resolution with overrange (bit including sign), max. | 13 bit; + sign |
| Interference voltage suppression for interference frequency f1 in Hz | 40 dB, DC to 60 Hz |
| shielded, max. | 100 m; shielded, twisted pair |
| IP degree of protection | IP20 |
| Product lifecycle | Active Product |
Frequently Asked Questions
What is Siemens 6ES7231-4HF50-0XB0?
It is a SIMATIC S7-1200 G2 SM 1231 analog input module with 8 AI and 14 bit ADC inputs.
Which input signal ranges does this module support?
It supports +/-10 V, +/-5 V, +/-2.5 V, 0-20 mA, and 4-20 mA.
What are the key power and supply specifications for 6ES7231-4HF50-0XB0?
The rated supply voltage is 24 V DC, with a permissible range from 20.4 V to 28.8 V.
What diagnostic functions are included on this analog input module?
It includes diagnostics function, diagnostic alarm, supply voltage monitoring, wire break detection, and a DIAG LED.
