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Siemens SIMATIC S7-300 Digital Input Module SM 321 (64 DI, 24V DC)

Siemens SIMATIC S7-300 64-channel Digital Input Module (24V DC).

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ManufacturerSiemens

Part number6ES7321-1BP00-0AA0

Type Digital Input Module

Series SIMATIC S7-300

Model SM 321

Channels 64 DI

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64 Digital Inputs 24V DC Operation 3ms Response Time Grouped Inputs Sinking/Sourcing Capability SIMATIC S7-300 Compatible

Product description

The Siemens SIMATIC S7-300 digital input module SM 321 (6ES7321-1BP00-0AA0) provides 64 channels of 24V DC digital input, operating with a 3ms signal delay. Inputs are grouped in sets of 16 and offer sinking/sourcing capabilities. This module is designed for integration within the SIMATIC S7-300 automation system.

This module is essential for connecting binary signals from field devices such as switches, pushbuttons, and proximity sensors to the S7-300 PLC. It is commonly used in applications across various industries including automotive manufacturing, material handling, and process automation where digital input is required for control logic.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens SIMATIC S7-300 SM 321 module. We provide reliable, tested surplus components to ensure the seamless operation of your automation projects. Source your Siemens input modules from Stanlo and benefit from our expertise and commitment to quality.

Technical specifications

Type	Digital Input Module
Series	SIMATIC S7-300
Model	SM 321
Channels	64 DI
Voltage	24 V DC
Response Time	3 ms
Grouping	16 channels
Input Type	Sinking/Sourcing

Common applications

Machine Control

Factory Automation

Material Handling

Process Control

Industrial Monitoring

Automotive Manufacturing

Compatible systems

Siemens SIMATIC S7-300 PLC Siemens STEP 7 Software

Also known as

Siemens SM 321 DI Module 6ES73211BP000AA0 SIMATIC S7-300 Input Card

Replaces / compatible with

Replaces older Siemens SM 321 modules with similar specifications. Requires terminal block 6ES7392-1.N00-0AA0 and appropriate cabling.

Technical note

Expert tip

This module uses a 3ms response time, which is suitable for most standard automation tasks but may not be ideal for high-speed motion control applications requiring faster response times.

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Frequently asked questions

What are the required accessories for the Siemens SIMATIC S7-300 SM 321 module (6ES7321-1BP00-0AA0)?

The Siemens SIMATIC S7-300 SM 321 module requires the 6ES7392-1.N00-0AA0 terminal block and a compatible cable (e.g., 6ES7392-4...0-0AA0) for connection to field devices.