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Siemens SIMATIC S7-300 Digital Input Module SM 321 (16DI)

Siemens SIMATIC S7-300 Digital Input Module SM 321 (16DI).

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ManufacturerSiemens

Part number6ES7321-1BH02-0AA0

Type Digital Input Module

Series SIMATIC S7-300 SM 321

Number of Inputs 16 DI

Voltage 24 V DC

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16 Digital Inputs 24 V DC Input Voltage Isolated Inputs SM 321 Series SIMATIC S7-300 Compatible Reliable Signal Acquisition

Product description

The Siemens 6ES7321-1BH02-0AA0 is a SIMATIC S7-300 series digital input module (SM 321) that provides 16 isolated digital inputs. Each input operates at 24 V DC, suitable for connecting various industrial sensors and switches.

This module is designed for standard digital input tasks in automation systems. It is commonly used in manufacturing, material handling, and process control applications where reliable detection of binary signals is required. The isolation feature enhances signal integrity and protects the PLC from voltage spikes.

Stanlo Automation, a veteran-owned surplus parts distributor, offers dependable sourcing for essential automation components. When you need a reliable Siemens 6ES7321-1BH02-0AA0 digital input module, rely on Stanlo Automation for quality parts and timely delivery to keep your operations running smoothly.

Technical specifications

Type	Digital Input Module
Series	SIMATIC S7-300 SM 321
Number of Inputs	16 DI
Voltage	24 V DC
Isolation	Yes
Connection	1x 20-pole

Common applications

Manufacturing Automation

Industrial Control

Machine Monitoring

Process Automation

Material Handling

Sensor Input

Compatible systems

SIMATIC S7-300 PLC Systems

Also known as

Siemens SM 321 16DI 6ES73211BH020AA0 SIMATIC S7-300 Input Module

Replaces / compatible with

This module replaces older versions of the SM 321 16-channel digital input modules within the SIMATIC S7-300 system.

Technical note

Expert tip

Ensure the 20-pole connector is securely attached and wired correctly for reliable operation of the 16 digital inputs.

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Frequently asked questions

How many digital inputs does the Siemens 6ES7321-1BH02-0AA0 provide?

The Siemens 6ES7321-1BH02-0AA0 is a digital input module that provides 16 isolated digital inputs. These inputs are designed to accept 24 V DC signals.