SIEMENS SM321 DIGITAL INPUT MODULE – SIMATIC S7

The Siemens SM321 is a reliable and robust Digital Input Module designed for SIMATIC S7 automation systems. With 16 optically isolated digital inputs and a compact footprint, it ensures high-performance signal acquisition in industrial environments. Ideal for scalable and flexible PLC system expansion.

Manufacturer: SIEMENS
Family: SIMATIC S7
Type: Digital INPUT Module
Model: SM321
MRN: 6ES7321-1BH01-0AA0
SN: C-J4009161

Technical Information

• Supply Voltage: 24 V DC
• Number of Digital Inputs: 16
• Connection Method: 20-pin (front connector required)
• Isolation: Optically Isolated
• Dimensions: 40 x 120 x 125 mm