B&R X20SLX410 Failsafe Safety Logic Controller for Machine Safety Systems

Product Overview

The B&R X20SLX410 is a compact safety logic controller (failsafe I/O module) from the X20 system family. It integrates 4 failsafe digital inputs and 4 failsafe digital outputs, providing a complete safety controller in a single module. The X20SLX410 is certified for Safety Integrity Level 3 (SIL 3) according to IEC 61508 and Performance Level e (PL e) according to ISO 13849-1, making it suitable for the most demanding machine safety applications. The module can be used as a standalone safety PLC or as a distributed safety I/O node on a SAFETYNET p or POWERLINK Safety network when paired with a B&R safety controller.

Key Features of X20SLX410

The 4 failsafe inputs are suitable for connecting emergency stop buttons, safety switches, light curtains, and other safety devices. Inputs are 24 V DC with test pulse outputs for cross-circuit detection. The 4 failsafe outputs (solid-state, 24 V DC, 2 A per channel) can directly drive safety contactors, valves, and indicator lamps. The module includes integrated safety logic processing, allowing it to execute safety functions independently without an external safety PLC. The X20SLX410 supports both 1- and 2-channel input configurations with manual or automatic reset.

The module is programmed using B&R's Automation Studio software, which includes pre-certified safety function blocks. The X20SLX410 communicates with the standard X20 controller via the X20 bus, providing diagnostic and status data. It is designed for DIN rail mounting and has a compact width of 37.5 mm. The operating temperature range is -25 to +60°C. The module is powered by 24 V DC and consumes 2 W. It includes LED indicators for power, input/output status, and fault conditions. The X20SLX410 is certified by TÜV and complies with CE, UL, and CSA standards.

Technical Specifications

• Manufacturer: B&R Automation

• Part Number: X20SLX410

• Series: X20 (Safety Logic)

• Product Type: Failsafe Safety Logic Controller

• Safety Inputs: 4 (24 V DC, with test pulses)

• Safety Outputs: 4 (solid-state, 24 V DC, 2 A)

• Test Pulse Outputs: 2

• Safety Level: SIL 3 (IEC 61508), PL e (ISO 13849-1)

• Programming Software: Automation Studio

• Safety Language: Function block diagram (FBD)

• Communication: X20 bus (to standard controller)

• Power Supply: 24 V DC (-15% / +20%)

• Power Consumption: 2 W

• Indicators: Power, I/O status, fault LEDs

• Operating Temperature: -25 to +60 °C

• Storage Temperature: -40 to +85 °C

• Degree of Protection: IP20

• Mounting: DIN rail (35 mm)

• Width: 37.5 mm

• Certifications: TÜV, CE, UL, CSA

Functional Description

The X20SLX410 executes the safety logic program stored in its internal memory. The program is created in Automation Studio using safety-certified function blocks. The inputs are monitored for wire breaks, cross faults, and voltage validity. When all safety conditions are satisfied, the outputs are activated. If any input indicates a fault or the safety logic is not satisfied, the outputs de-energize within the specified response time (typically < 10 ms). The module can also communicate diagnostic status to the standard control system via the X20 bus, allowing SCADA monitoring.

Applications

The B&R X20SLX410 is used in machine safety systems requiring a compact, standalone safety controller. Typical applications include emergency stop monitoring, guard door interlocking, light curtain evaluation, and two-hand control systems for packaging machines, robotics, and small production cells.