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Siemens 6ES7321-1BL00-0AA0 Product Details

Sep 13, 2025 Siemens

Siemens 6ES7321-1BL00-0AA0 is a digital input module for Siemens S7-300 series PLC(Programmable Logic Controller).The following is a detailed introduction to the module.

Siemens 6ES7321-1BL00-0AA0

Basic Overview

Model:6ES7321-1BL00-0AA0

Brand:Siemens

Series:S7-300

Type:Digital Input Module

Technical Specifications

Number of Input Points:32 points(i.e.32 digital input channels)

Input Type:Opto-isolated Input

Power Supply Voltage:DC 24V(Allowable Range:20.4V to 28.8V)

Input Current:From backplane bus DC 5V,maximum value 15mA

Input Characteristics:Compliant with IEC 61131 standard,type 1

Input voltage range

For signal”0″:-30V to+5V

For signal”1″:13V to 30V

Input delay:minimum 1.2ms,maximum 4.8ms from”0″to”1″

Wire length

Shielded wire length:maximum 1000m

Unshielded wire length:maximum 600m

Connectable sensor:two-wire sensor

Allowed closed-circuit current:maximum 1.5mA for two-wire sensor

Diagnostic function:None(but with LED for digital input status display)

Physical characteristics

Dimensions:width 40mm,height 125mm,depth 120mm

Weight:about 260g

Installation position:horizontal or vertical installation

Operating temperature

Horizontal installation:up to 40℃,maximum 32(maximum 16 at 60℃)

Vertical installation:up to 40℃,maximum 32

Siemens 6ES7321-1BL00-0AA0

Functional characteristics

High performance:The module has efficient input and output processing capabilities and can respond quickly to signals from external devices.

High stability:After rigorous testing and quality control,it can work stably for a long time in harsh environments.

Easy to configure:Users can perform simple configuration through the STEP 7 software provided by Siemens.

Flexibility:Supports multiple input signal types,such as switch input,etc.,to meet the industry’s needs for flexibility and scalability.

Application scenarios

Industrial automation:used for equipment monitoring and control,real-time collection and processing of equipment operation data,and improving production efficiency and quality.

Mechanical manufacturing:used for machine programming and control to achieve automated production and flexible production line layout.

Intelligent building:used for control and management of building equipment to achieve energy consumption monitoring and energy-saving optimization.

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