Siemens 6ES7326-1BK02-0AB0

Brand: Siemens
Model: 6ES7326-1BK02-0AB0

Inventory situation: Goods are available in stock.

Product features

The Siemens 6ES7326-1BK02-0AB0 is a high-reliability safety digital input module for the SIMATIC S7-300 series that is appropriate for industrial applications requiring precision and safety. The Siemens 6ES7326-1BK02-0AB0, which has 24 digital input points and operates at 24V DC, can accommodate a wide range of industrial sensors and switches, including 2-wire proximity sensors, NAMUR encoders, and mechanical contacts. It works flawlessly with both shielded (up to 200m) and unshielded (up to 100m) cables, providing flexibility for a variety of installation scenarios. The module's input delay of ≤3.4ms enables rapid signal response, crucial for real-time safety control in high-speed manufacturing lines.

The Siemens 6ES7326-1BK02-0AB0 puts safety first. It complies with EN 954-1 Category 4, IEC 61508 SIL 3, and ISO 13849-1 Performance Level e (PLE) requirements, ensuring strong protection against system failure. Channel-to-channel isolation (per 12 points) and backplane bus isolation help to prevent electrical interference, while reverse polarity protection protects the module from wiring errors. These design decisions make the Siemens 6ES7326-1BK02-0AB0 appropriate for hazardous environments and safety-critical applications like machine guarding, process shutdown systems, and automated assembly lines.

The Siemens 6ES7326-1BK02-0AB0 also includes built-in diagnostic functions that make maintenance and troubleshooting easier. LED indicators display fault safety status and group errors (SF), whereas diagnostic alerts provide detailed information on issues such as wire failures or sensor malfunctions. This enables professionals to quickly detect and repair issues, reducing downtime. Furthermore, the module has four independent sensor power outputs (400mA maximum each), which eliminates the need for an extra power supply for linked devices.

Specifications

Model	6ES7326-1BK02-0AB0
Product type	SIMATIC S7-300 Series Fail-safe Digital Input Module
Rated Voltage (DC)	24V
Voltage Range (DC)	18-30V
Power Consumption (typical)	10W
Number of Inputs	24 points
Input Type	24V DC
Required Front Connector	40-pin

Precautions

For wiring practices, adhere to the cable length limits specified for the Siemens 6ES7326-1BK02-0AB0: shielded cables should not exceed 200m, and unshielded cables must stay under 100m to maintain signal integrity and avoid interference. When connecting sensors (such as 2-wire proximity switches or NAMUR encoders), ensure the total current draw does not exceed the module's 400mA maximum output per isolated sensor power channel. Overloading the sensor power can trigger diagnostic alarms or compromise safety functions, which are critical for meeting EN 954-1 Category 4 and SIL 3 requirements.

Environmental conditions are vital for the Siemens 6ES7326-1BK02-0AB0's operation-avoid operating the module outside the 0°C to 60°C temperature range or in environments with relative humidity above 95% (without condensation). Extreme temperatures or moisture can degrade internal components and reduce the module's safety performance. Additionally, ensure proper mounting on a standard S7 rail with sufficient ventilation, as overheating may lead to unexpected shutdowns in high-demand industrial settings.

Regular maintenance and diagnostic checks are essential for the Siemens 6ES7326-1BK02-0AB0. Periodically inspect the LED indicators: the red SF (group error) light and fault safety status LED provide real-time feedback on module health. If a diagnostic alarm is triggered, use the module's built-in diagnostic functions to identify issues like wiring faults or sensor malfunctions promptly-delayed troubleshooting can extend downtime in automated production lines. Never ignore SF alarms, as they indicate potential safety risks that could affect the entire SIMATIC S7-300 F system.

FAQ

Q: What is the Siemens 6ES7326-1BK02-0AB0, and what is its primary function?

A: The Siemens 6ES7326-1BK02-0AB0 is a Failsafe Digital Input Module (SM 326 F-DI 24xDC 24V) from the SIMATIC S7-300 family. Its primary function is to reliably read digital signals (like on/off states) from field devices such as emergency stop buttons, safety gates, or NAMUR sensors and convert them for processing by a safety-oriented programmable logic controller (PLC). It is designed for applications where functional safety is critical.

Q: Is the Siemens 6ES7326-1BK02-0AB0 module still in production?

A: No. According to official information, the product announcement of discontinuation was made, and its product lifecycle status is set to "PM400: product announced as discontinued / will be phased out." The official product discontinuation time was October 1, 2023. While some distributors may still have stock, it is no longer in active production by Siemens.

Q: Can this module be used in a standard, non-safety application?

A: Yes. The module can also operate in a standard (non-failsafe) mode, where it functions like a conventional S7-300 digital input module. This provides flexibility, but its primary value lies in its safety capabilities.