6ES7321-1BH02-0AA0 | Siemens | Simatic S7-300, Digital input SM 321

Overview

The 6ES7321-1BH02-0AA0 is a SIMATIC S7-300 digital input module (SM 321) designed for reliable detection of DC signals in industrial automation. It provides 16 inputs and ensures safe operation with high-voltage isolation.

Key Features

• 16 DC digital inputs for precise signal detection.

• Rated voltage: 24 V DC with low backplane current consumption (max. 10 mA at 5 V DC).

• High isolation tested up to 500 V DC for safe industrial operation.

• Compact dimensions for easy installation in control cabinets.

• Lightweight and space-efficient design suitable for S7-300 systems.

Technical Specifications

• Manufacturer: Siemens

• Part Number: 6ES7321-1BH02-0AA0

• Product Type: SIMATIC S7-300 Digital Input SM 321

• Rated Voltage: 24 V DC

• Input Current from Backplane Bus: 10 mA max @ 5 V DC

• Number of Inputs: 16

• Type of Input Voltage: DC

• Isolation Tested With: 500 V DC

• Dimensions: 12 × 4 × 12.5 cm

• Weight: 0.2 Kg

• Shipping Weight: 3 Kg

Applications

The 6ES7321-1BH02-0AA0 is ideal for digital signal acquisition in S7-300 PLC systems, industrial automation, and process control applications. It ensures reliable input monitoring and safe integration into control networks.