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Siemens 6ES7 321-1BL00-0AB0 SIMATIC S7-300 Digital Input Module

Name: Siemens 6ES7 321-1BL00-0AB0
Brand: Siemens
SKU: 6ES7 321-1BL00-0AB0
Availability: InStock

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ManufacturerSiemens

Part number6ES7 321-1BL00-0AB0

Number of Inputs 32

Input Voltage 24 V DC

Isolation Yes (groups of 16)

Counter Function Yes (Ch 0 & 1)

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32 Isolated Digital Inputs 24V DC Optional Counter Function (2 channels) High Counting Frequency (6 kHz) Suitable for Switches and Proximity Sensors IEC 61131 Type 3 Input Characteristic

Product description

The Siemens 6ES7 321-1BL00-0AB0 is a high-performance Digital Input Module for the SIMATIC S7-300 series, featuring 32 isolated digital inputs operating at 24V DC. Notably, channels 0 and 1 can optionally function as counters, supporting a counting frequency of up to 6 kHz. This module is suitable for connecting to switches and various proximity sensors (2-, 3-, 4-wire).

This versatile module is ideal for applications requiring both standard digital inputs and high-speed counting functions. Its isolated inputs offer protection against electrical noise, ensuring reliable data for control systems in manufacturing, process automation, and other demanding industrial environments.

Stanlo Automation, a veteran-owned distributor, is your source for the Siemens 6ES7 321-1BL00-0AB0. We provide access to quality surplus and new automation parts to keep your operations running smoothly.

Technical specifications

Number of Inputs	32
Input Voltage	24 V DC
Isolation	Yes (groups of 16)
Counter Function	Yes (Ch 0 & 1)
Counting Frequency	Up to 6 kHz
Front Connector	40-pin

Common applications

High-Speed Counting

Process Control

Manufacturing Automation

Motion Control

Assembly Lines

Packaging Machinery

Compatible systems

SIMATIC S7-300 PLC, STEP 7 TIA Portal V13 SP1+, STEP 7 V5.5 SP3+

Also known as

SIMATIC S7-300 SM 321 DI 32x24VDC HF Siemens Digital Counter Module

Replaces / compatible with

This module can be used as a direct replacement or expansion for S7-300 systems requiring high-speed counting capabilities.

Technical note

Expert tip

The module supports I&M data and has a parameterizable input delay from 0.05 ms to 20 ms, with input characteristic in accordance with IEC 61131, type 3.

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Frequently asked questions

Can the Siemens 6ES7 321-1BL00-0AB0 be used for high-speed counting?

Yes, the Siemens 6ES7 321-1BL00-0AB0 features two channels (0 and 1) that can be configured as high-speed counters, capable of frequencies up to 6 kHz. The remaining 30 channels function as standard digital inputs.