Description
⚙️ Product Overview
The B&R X20SC0806 is an X20-series safety I/O module designed for safety-related digital signal acquisition and actuator control. It combines 8 safe digital inputs, 4 pulse outputs, and 6 safe digital outputs in one compact module.
The eight safe digital inputs are Type A inputs with individually configurable software filters. The module also provides pulse outputs that can be used for sensor-line diagnostics. The six safe digital outputs are Type B2 high-side outputs rated at 24 VDC and 0.2 A per channel.
With a nominal 24 VDC I/O supply, the X20SC0806 is intended for integration into B&R X20 safety control architectures. It can be used to monitor safety-related field signals and control suitable actuators where the overall system is designed for the required safety level.
🔧 Key Features
- 8 safe Type A digital inputs
- 6 safe Type B2 digital outputs
- 4 integrated pulse outputs
- 24 VDC nominal I/O supply
- Individually configurable software input filters
- Hardware input filter ≤150 µs
- High-side/high-side semiconductor outputs
- 0.2 A nominal output current per safe output
- Integrated output protection
- OSSD test pulse capability
- Input and output diagnostics through LEDs and software
- Channel-to-bus electrical isolation
- Supports safety applications up to SIL 3 / PL e
- X20-series modular installation
- Compatible with X20 12-pin terminal blocks
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | B&R |
| Model | X20SC0806 |
| Product Family | X20 SafeIO |
| Product Type | Safe Digital Mixed I/O Module |
| B&R ID Code | 0xE75A |
| Safe Digital Inputs | 8 |
| Input Type | Type A |
| Input Circuit | Sink |
| Input Nominal Voltage | 24 VDC |
| Input Voltage Range | 24 VDC -15% / +20% |
| Input Current | 2 to 3.28 mA @ 24 VDC |
| Input Switching Threshold | Low <5 VDC / High >15 VDC |
| Pulse Outputs | 4 |
| Pulse Output Type | Push-Pull |
| Pulse Output Current | 50 mA/channel |
| Safe Digital Outputs | 6 |
| Output Type | Type B2, FET, 2× positive switching |
| Output Current | 0.2 A/channel |
| Total Safe Output Current | 1.2 A |
| Output Test Pulse | Max. 10 µs |
| I/O Supply | 24 VDC |
| Bus Power Consumption | 0.4 W |
| Internal I/O Power | 2.5 W |
| Input Hardware Filter | ≤150 µs |
| Software Input Filter | 0–500 ms, configurable |
| Channel-Bus Isolation | Yes |
| Protection Rating | IP20 |
| Horizontal Operating Temperature | 0 to 60°C |
| Vertical Operating Temperature | 0 to 50°C |
| Storage Temperature | -40 to 85°C |
| Relative Humidity | 5–95%, non-condensing |
| Mounting | Horizontal / Vertical |
| Product Condition | New Surplus |
🛡️ Safety Function
The X20SC0806 is designed specifically for safety-related I/O applications. B&R specifies the module for applications up to SIL 3 and Category 4 / PL e, when the complete safety system is correctly designed and implemented. The module itself should not be considered a standalone safety system; the final safety performance depends on the complete architecture, configuration, wiring, software, and application.
The safe inputs can be used for signals from safety switches, sensors, emergency-stop circuits, and other suitable safety devices. The outputs can control compatible actuators or enable inputs where the electrical and safety requirements are met.
The semiconductor output design also means that the safety-related characteristics do not depend on mechanical switching cycles. Integrated protection and diagnostic functions help identify output faults and other field-level problems.
🔌 Digital Input Characteristics
The eight safe digital inputs use a sink-type input circuit.
The nominal input voltage is 24 VDC, with an allowable supply range of 24 VDC -15% / +20%. A signal below 5 VDC is recognized as LOW, while a signal above 15 VDC is recognized as HIGH.
Each input has a hardware filter of ≤150 µs, while the software filter can be configured independently from 0 to 500 ms. This allows the input behavior to be adapted to different sensor and switch characteristics.
The module can also generate pulse signals for sensor-line diagnostics. This is useful when the application needs more than simple ON/OFF signal acquisition.
⚡ Safe Digital Outputs
The six safe digital outputs are Type B2 high-side outputs with two positive switching paths.
Each output is rated for 24 VDC and 0.2 A, with a total nominal current of 1.2 A for the six safe outputs. The outputs are intended for suitable safety-related actuators and control signals.
The output stage includes protection against overload and short-circuit conditions. The maximum specified test-pulse length is 10 µs, which is relevant when integrating devices that use OSSD-style diagnostic behavior.
Special attention should be paid to the wiring requirements for Type B2 outputs, especially when connecting actuators with a defined reference potential.
📡 Pulse Output Function
Four additional pulse outputs are integrated into the module.
These are push-pull outputs with a nominal output current of 50 mA per channel. Their primary role can include generating diagnostic pulses for connected sensor lines.
The pulse outputs have individual overload/short-circuit shutdown behavior and are therefore different from the six safety-related 0.2 A outputs.
🏭 Typical Applications
- Safety machine control
- Emergency-stop monitoring
- Safety door and guard monitoring
- Safety sensor interfaces
- Industrial machinery
- Packaging equipment
- Robotics and automation cells
- Conveyor systems
- Motion-control safety circuits
- Frequency-inverter enable circuits
- Production-line safety systems
- General B&R X20 safety I/O architectures
🔧 Installation & Configuration Notes
The X20SC0806 is an X20 modular I/O component and is not intended for standalone operation. It should be installed within a compatible B&R X20 system with the appropriate bus components and safety architecture.
B&R specifies that the module uses X20 12-pin terminal blocks. The safety-keyed terminal blocks and bus module are ordered separately, so the available accessories should be checked when preparing a replacement installation.
Before commissioning, verify:
- X20 system compatibility
- Module position and bus configuration
- 24 VDC I/O supply
- Safety input wiring
- Output wiring and reference potentials
- Sensor type and diagnostic requirements
- Input filter settings
- Safety software configuration
- Required Safety Release / runtime compatibility
- Complete safety validation before operation
For a replacement module, it is recommended to record the existing hardware configuration and safety application parameters before removing the original unit.
⚠️ Important Compatibility Note
X20SC0806 should not be confused with other B&R X20 safety modules such as X20SC0402 or X20SC0842.
The channel count and output configuration are different:
- X20SC0806: 8 safe inputs + 4 pulse outputs + 6 safe Type B2 outputs, 0.2 A
- X20SC0402: 4 safe inputs + 4 pulse outputs + 2 safe Type B2 outputs, 0.2 A
- X20SC0842: 8 safe inputs + 4 pulse outputs + 4 Type A outputs at 3 A + 2 Type B2 outputs at 50 mA
Therefore, the module should be replaced by exact part number unless the complete safety design has been reviewed.
❓ Common Questions & Answers
Q: Is X20SC0806 a safety module?
A: Yes. It is a B&R X20 SafeIO module intended for safety-related digital I/O applications.
Q: How many safe digital inputs are available?
A: There are 8 safe Type A digital inputs.
Q: How many safe outputs does it have?
A: It has 6 safe Type B2 digital outputs rated at 24 VDC and 0.2 A per channel.
Q: What are the four pulse outputs used for?
A: They can provide pulse signals for sensor-line diagnostics and related functions.
Q: What voltage does the module use?
A: The nominal I/O voltage is 24 VDC, with a specified range of 24 VDC -15% / +20%.
Q: What is the maximum output current?
A: Each of the six Type B2 safe outputs is rated at 0.2 A.
Q: Can X20SC0806 be used for SIL 3 applications?
A: B&R specifies the module for functional-safety applications up to SIL 3. The complete application must meet the required safety architecture and validation requirements.
Q: Can it be installed vertically?
A: Yes. Both horizontal and vertical mounting are supported, although the permitted operating temperature differs between the two orientations.
Q: Does the module include terminal blocks?
A: The module is designed for X20 12-pin terminal blocks, but the safety-keyed terminal blocks are ordered separately.
Q: Is X20SC0806 the same as X20SC0842?
A: No. Their safe output configurations are different. Confirm the exact model before replacement.
🔧 Recommended B&R X20 Models
- B&R X20SC0402 — Safe Digital Mixed I/O Module
- B&R X20SC0806 — Safe Digital Mixed I/O Module
- B&R X20SC0842 — Safe Digital Mixed I/O Module
- B&R X20SC2212 — Safe Digital Mixed I/O Module
- B&R X20SO6300 — Safe Digital Output Module
- B&R X20SO6530 — Safe Digital Output Module
- B&R X20SO2530 — Safe Digital Output Module
- B&R X20SLX806 — Safe Digital Mixed Module
- B&R X20SLX402 — Safe Digital Mixed Module
- B&R X20SI4100 — Safe Digital Input Module
📦 Product Selection Reminder
The X20SC0806 is best identified by its complete B&R material number X20SC0806 and ID code 0xE75A.
When ordering a replacement, check the number of safety inputs, safe output type, output current, pulse-output requirements, terminal-block arrangement, and existing safety application configuration.
Product Condition: New Surplus. Actual label, revision, serial number, terminal blocks, and accessories should be verified against the available physical unit before shipment.
