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Siemens SIMATIC S7 SM 326 Fail-Safe Digital Input Module - 24x 24V DC

Siemens SIMATIC S7 SM 326 Fail-Safe Digital Input Module with 24 DI.

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ManufacturerSiemens

Part number6ES7326-1BK02-0AB0

Type Fail-Safe Digital Input Module SM 326

Inputs 24 DI

Voltage 24V DC

Safety Level Cat 4 (EN 954-1) / SIL3 (IEC61508) / PLe (ISO13849)

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24 Fail-Safe Digital Inputs 24V DC Operation High Safety Integrity (SIL3/PLe) Diagnostic Alarms For SIMATIC S7 F-systems Certified to EN 954-1 / IEC61508

Product description

The Siemens 6ES7326-1BK02-0AB0 is a SIMATIC S7 fail-safe digital input module (SM 326) designed for safety-critical applications. It provides 24 fail-safe digital inputs operating at 24V DC. This module is certified up to Category 4 (EN 954-1) / SIL3 (IEC61508) / PLe (ISO13849), offering enhanced protection with diagnostic alarms.

This module is essential for safety instrumented systems (SIS) in industries such as chemical processing, pharmaceuticals, and heavy manufacturing where reliable detection of safety-related events is paramount. It integrates seamlessly with SIMATIC S7 F-systems.

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Technical specifications

Type	Fail-Safe Digital Input Module SM 326
Inputs	24 DI
Voltage	24V DC
Safety Level	Cat 4 (EN 954-1) / SIL3 (IEC61508) / PLe (ISO13849)
Diagnostics	Yes
Connector	1x 40-pole
Series	SIMATIC S7 F-Systems

Common applications

Emergency Stop Systems

Safety Interlocking

Machine Safety

Hazardous Area Control

Process Safety

Industrial Safety Systems

Compatible systems

SIMATIC S7 F-systems (with F-CPU)

Also known as

Siemens SM 326 F-DI SIMATIC S7 F-DI Module 6ES73261BK020AB0

Replaces / compatible with

Designed for use with Siemens SIMATIC S7 F-systems, this module replaces previous generations of fail-safe digital input modules or expands safety I/O capabilities.

Technical note

Expert tip

Requires appropriate safety programming within the SIMATIC S7 F-CPU for full fail-safe functionality.

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Frequently asked questions

What safety certifications does the Siemens 6ES7326-1BK02-0AB0 module meet?

The Siemens 6ES7326-1BK02-0AB0 fail-safe digital input module meets high safety standards, including up to Category 4 according to EN 954-1, SIL3 according to IEC61508, and PLe according to ISO13849. It also provides diagnostic alarms for enhanced safety monitoring.