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Siemens SIMATIC S7-300 SM 321 Digital Input Module

Name: Siemens 6ES7321-1BH81-0AA0
Brand: Siemens
SKU: 6ES7321-1BH81-0AA0
Availability: InStock

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ManufacturerSiemens

Part number6ES7321-1BH81-0AA0

Part Number 6ES7321-1BH81-0AA0

Manufacturer Siemens

Product Type Digital Input Module

Series SIMATIC S7-300

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16 digital inputs 24V DC operation Optically isolated Suitable for expanded temperature range Seamless S7-300 integration 20-pin connector

Product description

The Siemens 6ES7321-1BH81-0AA0 is a SIMATIC S7-300 Digital Input Module (SM 321) designed for expanded temperature ranges. It offers 16 optically isolated digital inputs for 24V DC signals and features a 20-pin connector for easy integration. This module is built for reliable operation in demanding industrial environments.

This module is a critical component for any S7-300 PLC system requiring the acquisition of digital signals. It is widely used in factory automation, process control, and building management systems where precise input status monitoring is essential.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, provides the Siemens 6ES7321-1BH81-0AA0. Sourcing from us ensures you receive quality, tested components at competitive prices, helping to keep your operations running smoothly.

Technical specifications

Part Number	6ES7321-1BH81-0AA0
Manufacturer	Siemens
Product Type	Digital Input Module
Series	SIMATIC S7-300
Inputs	16 DI
Voltage	24V DC
Isolation	Optically Isolated
Temperature Range	Expanded

Common applications

Factory automation

Process control

Machine control

Building automation

SCADA systems

Compatible systems

Siemens SIMATIC S7-300 PLC systems.

Also known as

Siemens SM 321 Digital Input Module 6ES7321-1BH81-0AA0

Replaces / compatible with

This module is a standard component for Siemens SIMATIC S7-300 systems, designed to interface with various digital sensors and switches.

Technical note

Expert tip

Ensure that the connected devices provide a clean 24V DC signal to prevent false triggering or module damage.

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Frequently asked questions

What is the voltage rating for the Siemens 6ES7321-1BH81-0AA0 Digital Input Module?

The Siemens 6ES7321-1BH81-0AA0 Digital Input Module is designed for 24V DC signals. It features 16 optically isolated inputs, making it suitable for a wide range of industrial applications.