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Siemens Simatic S7-300 Digital Input

The Siemens 6ES7 326-1BK02-0AB0 is a fail-safe digital input module from the SIMATIC S7-300 series (SM 326). This unit is designed for safe acquisition of digital signals in safety-oriented automation systems and is typically used in machine and plant control applications. The module processes 24 digital input signals at 24 V DC and provides diagnostic and safety features to ensure reliable plant operation.

With integrated Safety Integrated technology, the module meets rigorous safety standards up to Category 4 according to EN 954-1, SIL3 according to IEC 61508, and Performance Level e according to ISO 13849. This makes the module especially suitable for safety-relevant applications such as emergency stop circuits, safety door monitoring, or safety interlocks.

The module features a 40-pin connector and can be used either centrally in S7-300 controllers or decentrally in ET 200M systems via PROFIBUS or PROFINET. Thanks to its integrated diagnostic functions, errors or signal faults are detected at an early stage and reported to the controller.

Technical specifications:

* Type: Digital Input Module SM 326 F-DI
* Article number: 6ES7 326-1BK02-0AB0
* 24 digital inputs
* Input voltage: 24 V DC
* Fail-safe design (Safety Integrated)
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* Diagnostic alarm and safety monitoring
* Safety level: SIL3 / PL e / Category 4
* Connection: 1× 40-pin
* Usable in SIMATIC S7-300 and ET 200M

Typical applications:

* Safety-oriented machine controls
* Emergency stop and safety circuits
* Plant and process automation
* Industrial plants with safety-relevant sensors

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