Siemens 6ES7321-1BL00-0AA0 6ES7 321-1BL00-0AA0 SM321 32-Pt Input

Description:

The Siemens 6ES7321-1BL00-0AA0 SM321 Digital Input Module is a 32-point input module used in SIMATIC S7-300 PLC automation systems. Commonly installed in industrial control panels and automation equipment to receive 24VDC signals from sensors, switches, and field devices. Maintenance teams, OEMs, and system integrators use this module for replacement, retrofit, and reliable digital signal acquisition.

Applications:

The Siemens 6ES7321-1BL00-0AA0 Digital Input Module is used in industrial automation systems requiring accurate and stable input monitoring, including manufacturing lines, packaging systems, conveyor automation, and process control. It is ideal for applications that demand fast signal response, high channel density, and dependable integration with S7-300 PLC platforms.

Technical Specifications:

• Brand: Siemens
• Part Number: 6ES7321-1BL00-0AA0
• Product Type: Digital Input Module (PLC I/O)
• Series: SIMATIC S7-300 (SM321)
• Number of Inputs: 32 digital inputs
• Input Voltage: 24 V DC
• Voltage Range: 20.4–28.8 V DC
• Input Type: DC, IEC 61131 compliant
• Isolation: Galvanically isolated inputs (grouped)
• Connector Type: 40-pin front connector
• Response Time: Approx. 1.2–4.8 ms
• Cable Length: Up to 1000 m (shielded)
• Power Consumption: ~6.5 W
• Mounting Type: Rack-mounted (S7-300 backplane)
• Application: Digital signal input for industrial automation systems

Common Replacements:

• Siemens 6ES7321-1BH02-0AA0
• Siemens 6ES7321-1BL00-0AB0
• Siemens 6ES7221-1BF32-0XB0