Description
NEW CONDITION
The Siemens part number
refers to a specific digital input expansion module for the SIMATIC S7-300 series of Programmable Logic Controllers (PLCs).Â
This module is designed to expand the input capabilities of an S7-300 system.Â
- Product Type: Digital input module SM 321.
- System Compatibility: SIMATIC S7-300 series.
- Number of Inputs: 16 digital inputs.
- Input Voltage: 24 V DC rated value (permissible range 20.4 V to 28.8 V DC).
- Isolation: Electrically isolated in groups of 16 channels, and optically isolated for protection from electrical noise.















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