Siemens S7-1200 analog input module, 6ES7231-7PF22-0XA0, 8 thermocouple inputs, types E/J/K/N/R/S/T, bipolar ±27,648, 62 mm depth.
| Parameter | Value |
|---|---|
| Number of analog inputs | 8 |
| Current input range | No |
| Voltage input range | Yes |
| Resistance measuring ranges | No |
| RTD support (resistance thermometer) | No |
| Thermocouple support (types) | Yes |
| Input range: -80 to +80 mV | Yes |
| Permissible input voltage, max. (destruction limit) | 30 V |
| Max. shielded signal cable length | 100 m; to the sensor |
| Parameter | Value |
|---|---|
| Resolution (bit incl. sign), max. | 16 bit; Temperature 0.1 °C / 0.1 °F |
| Measurement principle | Sigma Delta |
| Voltage measurement error (±) | 0.1 % |
| Interference voltage suppression (at interference frequency) | 85 dB at 50 / 60 / 400 Hz |
| Common-mode interference suppression, min. | 120 dB; At 120 V AC |
| Common-mode voltage, max. | 120 V; AC |
| Parameter | Value |
|---|---|
| Power loss, typ. | 1.8 W |
| Parameter | Value |
|---|---|
| Width | 71.2 mm |
| Height | 80 mm |
| Depth | 62 mm |
| Weight, approx. | 210 g |
The 6ES7231-7PF22-0XA0: Sigma-delta conversion provides a full-channel update every 810 ms, which sets the refresh rate for temperature monitoring across all eight inputs. The module handles -80 mV to +80 mV signals directly, with input resistance of 1 MΩ on all supported thermocouple types.
Common mode voltage is rated up to 120 V AC, with common mode rejection at least 120 dB at that voltage. Between the inputs and MANA (UCM) the isolation is 500 V AC.
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