6ES7326-1BK01-0AB0 SIEMENS

6ES7326-1BK01-0AB0 SIEMENS Basis unit

Product  Description：

The 6ES7326-1BK01-0AB0 is a 24-channel digital input module that operates at $24 \text{ VDC}$. It is categorized as a "fail-safe" module, meaning it is specifically designed to meet stringent international safety standards (such as SIL 3 according to IEC 61508). This module is typically used in conjunction with a fail-safe CPU (F-CPU) to monitor safety sensors like emergency stop buttons, light curtains, and safety switches. It features internal self-test routines and can detect external faults such as short circuits or cross-circuiting in the field wiring.

Product Parameters

• Product Family: SIMATIC S7-300, Digital Input SM 326

• Type: Fail-safe digital input (F-DI)

• Number of Inputs: 24 inputs (can be used in 1-out-of-1 or 1-out-of-2 configurations)

• Rated Load Voltage: $24 \text{ VDC}$

• Input Current: Typically $10 \text{ mA}$ per channel

• Isolation: Tested with $500 \text{ VDC}$ between channels and backplane bus

• Safety Integrity Level (SIL): Up to SIL 3 (IEC 61508)

• Performance Level (PL): Up to PL e (ISO 13849-1)

• Power Dissipation: Approximately $10 \text{ W}$

• Dimensions: Width $80 \text{ mm}$, Height $125 \text{ mm}$, Depth $120 \text{ mm}$

• Weight: Approximately $442 \text{ g}$

Product Advantages

A major advantage of the 6ES7326-1BK01-0AB0 is its Seamless Safety Integration. Because it fits into the standard S7-300 rail, it eliminates the need for a separate safety controller, reducing both hardware costs and cabinet space. The High Channel Density (24 inputs) allows for the monitoring of a large number of safety devices in a single module.

The module provides Comprehensive Diagnostics, which can pinpoint exactly which channel has a fault (e.g., wire break or short to M), significantly reducing troubleshooting time. Furthermore, it supports Flexible Configuration, allowing users to group inputs for redundant (2-channel) evaluations to achieve the highest safety ratings or use them as single-channel inputs for less critical functions.

Important Considerations and Precautions

When installing the 6ES7326-1BK01-0AB0, it is vital to use the Correct Front Connector. This module requires a 40-pin front connector, which is sold separately. Because this is a fail-safe module, the Safety Address (F-Address) must be set correctly using the DIP switches located on the side of the module to match the software configuration in STEP 7 or TIA Portal.

Ensure that the External Sensor Power Supply is stable and within the $24 \text{ VDC}$ tolerance, as fluctuations can trigger safety shutdowns. It is also important to note that this module is Discontinued (Phase-out started in 2023), so for new projects, Siemens recommends migrating to the SIMATIC S7-1500/ET 200MP safety system. Always ensure the Grounding Rail and shield connection elements are properly installed to prevent electromagnetic interference from causing "nuisance trips."

Product Applications

The 6ES7326-1BK01-0AB0 is a critical component in any industrial environment where human safety and machine protection are prioritized.

• Automotive Manufacturing: Monitoring emergency stop circuits and light curtains on robotic welding lines and assembly stations.

• Chemical and Process Industry: Acting as part of a Safety Instrumented System (SIS) to monitor pressure or level switches that trigger emergency shutdowns.

• Material Handling: Ensuring safe operation of high-speed conveyors and automated guided vehicles (AGVs) in warehouses.

• Food and Beverage: Protecting operators from rotating machinery and cutting tools using interlocked safety doors.

• Power Plants: Monitoring critical limit switches on turbines and heavy boilers.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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