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Siemens 6ES7321-1BH01-0AA0 SIMATIC S7-300 Digital Input Module

Name: Siemens 6ES7321-1BH01-0AA0
Brand: Siemens
SKU: 6ES7321-1BH01-0AA0
Availability: InStock

Siemens SIMATIC S7-300 SM 321, 16-channel 24V DC digital input module.

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ManufacturerSiemens

Part number6ES7321-1BH01-0AA0

Part Number 6ES7321-1BH01-0AA0

Manufacturer Siemens

Series SIMATIC S7-300

Module Type Digital Input SM 321

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16 Digital Inputs 24V DC Operation Optically Isolated SIMATIC S7-300 Compatible 20-pin Connector High Reliability

Product description

The Siemens 6ES7321-1BH01-0AA0 is a SIMATIC S7-300 digital input module (SM 321). It provides 16 optically isolated digital inputs, operating at 24V DC. The module features a 20-pin connector for easy integration into the S7-300 system.

This input module is essential for monitoring binary signals from field devices such as sensors, switches, and push buttons in industrial control applications. It is widely used in manufacturing, building automation, and process industries to gather real-time status information.

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Technical specifications

Part Number	6ES7321-1BH01-0AA0
Manufacturer	Siemens
Series	SIMATIC S7-300
Module Type	Digital Input SM 321
Number of Inputs	16 DI
Voltage	24V DC
Isolation	Optically Isolated
Connector	20-pin

Common applications

Industrial Automation

Process Control

Machine Control

Building Automation

SCADA Systems

Data Acquisition

Binary Signal Monitoring

Compatible systems

Siemens SIMATIC S7-300 PLC Systems S7-300 CPUs

Also known as

Siemens S7-300 DI Module SM 321 16DI Siemens 6ES7321

Replaces / compatible with

This module is part of the SIMATIC S7-300 digital input series, providing standard 16-channel discrete input functionality.

Technical note

Expert tip

Ensure proper wiring to the 20-pin connector and verify that the 24V DC supply is within the specified tolerance for optimal performance.

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Frequently asked questions

What is the input voltage and isolation type for the Siemens 6ES7321-1BH01-0AA0 digital input module?

The Siemens 6ES7321-1BH01-0AA0 SIMATIC S7-300 digital input module operates at 24V DC and features optically isolated inputs. It has 16 digital inputs and a 20-pin connector.