B&R X20 SO 6300 Safety Output Module

The B&R X20 SO 6300 is a fail-safe digital output module within the X20 system, providing eight safe output channels for controlling actuators in safety-critical applications. Certified to SIL3 (IEC 61508) and PL e (ISO 13849-1), this module is designed to work with B&R SafeLOGIC-X safety controllers or any openSAFETY-compatible master. It is used to safely switch off hazardous movements or activate safety functions like emergency stop and protective door monitoring.

Technical Specifications

Number of outputs: 8 fail-safe channels (PNP, 24V DC). Output voltage: 24V DC (nominal, 19.2-28.8V). Output current per channel: 0.5 A continuous, short-circuit protected. Total current per module: 4 A (all channels simultaneously). Output switching test pulses: integrated for cross-circuit detection. Diagnostic coverage >99%. Safe response time: ≤ 10 ms (off command). The module is equipped with a built-in sensor supply (24V, 200 mA) for powering safety sensors. Isolation: 500V between field and bus. Power consumption from X2X Link: 1.5 W. Width: 12.5 mm (1 slot). Operating temperature: -25°C to +60°C. Protection rating IP20.

Key Features

• 8 fail-safe digital outputs (PNP)

• Certified for SIL3 / PL e / Category 4

• Short-circuit and cross-circuit detection

• Built-in test pulses for output wiring integrity

• Integrated 24V sensor supply (200 mA)

• Compatible with openSAFETY and SafeLOGIC-X

• Hot-swappable (X2X Link support)

• LED status per channel (safe state and fault)

• Diagnostics via bus and front LEDs

Safety Architecture

The X20 SO 6300 uses two redundant microcontrollers and cross-monitoring to achieve high safety integrity. Each output channel is controlled by two independent paths; if a discrepancy is detected, the module enters a safe state (all outputs off). The module continuously performs internal self-tests and wire-break detection. The test pulses (1 ms) applied to the outputs allow detection of cross-circuits between channels or to 24V/GND. Outputs are switched off in<10 ms after a safety request from the controller.

Integration with B&R System

The module connects to the X2X Link bus and is configured in Automation Studio. For safety applications, it communicates with a SafeLOGIC-X CPU (e.g., X20 SL 8000) via openSAFETY protocol over POWERLINK or other fieldbuses. The safety program is developed in SafeDESIGNER (FBD/LD) and downloaded to the safety controller. The X20 SO 6300 then receives safety process data (Safe Output) and reports status back to the controller. Standard PLC can also read diagnostic information via black channel.

Wiring and Terminal Blocks

The module requires a X20TB12 terminal block (screw or spring). Pin assignment: each output channel has two pins: one for the output line (24V out) and one for the corresponding return (GND sense). The sensor supply (24V_SENS) and GND_SENS are available on separate pins. Outputs are tested via the sense line; a mismatch triggers safe state. All cables must be shielded when using long distances (>30m). The maximum cable length is 100m.

Applications

Typical safety applications include emergency stop output (safe cut-off of motor contactors), safety gate monitoring (de-energize guard locking), two-hand control monitoring (safe output to enable relay), light curtain interface (OSSD evaluation not directly; use safety input module). Also suitable for controlling safe valves in fluid power systems and safe braking controls.

Diagnostics and LEDs

LEDs per channel: green (output active), red (output fault). Module status: green (run), red (error). Diagnostic messages via software include: channel fault (short circuit, wire break), cross-circuit between channels, missing supply voltage, and overtemperature. The module stores a diagnostic history that can be read by the safety controller.

Environmental and Certifications

The X20 SO 6300 is certified by TÜV, UL, and CSA for functional safety. It meets CE, UKCA, and ATEX (Zone 2) requirements. Operating temperature: -25°C to +60°C; storage -40°C to +85°C. Humidity 5-95% non-condensing. Vibration 5g (10-55 Hz). The module is IP20 and requires installation in a protective cabinet.

Conclusion

The B&R X20 SO 6300 provides a compact, high-integrity solution for safe digital output in automation systems. Its 8 channels, integrated diagnostics, and openSAFETY compliance make it suitable for machine safety applications up to the highest performance level.