Siemens 6ES7431-0HH00-0AB0 SIMATIC S7-400 SM 431 16AI 13-Bit U/I PLC I/O Module

The Siemens 6ES7431-0HH00-0AB0 SIMATIC S7-400 SM 431 module provides 16 non-isolated analog inputs at 13-bit resolution, covering voltage ranges up to plus/minus 10 V and current ranges up to plus/minus 20 mA and 4-20 mA. An onboard 24 V DC supply powers up to 16 two-wire transmitters directly, and basic conversion time is 55 or 65 ms per channel depending on the interference-suppression setting.

Technical Specifications

Selection Notes

Sixteen non-isolated analog inputs share a common reference to the backplane, which fits applications where sensors share the same ground and channel count matters more than per-channel isolation. The onboard 24 V DC supply (up to 400 mA for all 16 channels) powers 2-wire, loop-current transmitters directly, so 4-20 mA sensors need no separate power source. Voltage ranges cover ±1 V, ±10 V and 1-5 V, and current ranges cover ±20 mA and 4-20 mA, all at 13-bit resolution with sign. Basic conversion time is 55 or 65 ms per channel depending on the 50/60 Hz interference-suppression setting selected.