B&R X20DC2395 Digital Input Module – X20 System

The B&R X20DC2395 is a digital input module belonging to the X20 series of modular I/O systems. This module provides 16 channels for 24V DC inputs, each with an LED status indicator. It is designed for use with B&R X20 CPU or bus controllers and communicates via the X20 backplane (X2X Link). The X20DC2395 features configurable input delay (0.1 ms to 32 ms), integrated diagnostics (wire break and short circuit detection), and electrical isolation between channels and the bus. It is suitable for industrial applications requiring high‑density digital signal acquisition.

Technical Specifications

• Model: X20DC2395

• Number of Inputs: 16, single‑ended (type 1)

• Input Voltage: 24V DC (nominal), 18–30V DC

• Input Current: Typically 5 mA per channel

• Input Delay (configurable): 0.1 ms, 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms

• Electrical Isolation: Yes, between channels and backplane (500 Vrms)

• Diagnostics: Wire break, short circuit to supply, sensor supply monitoring

• Status Indicators: Green LED per channel (active), plus module status

• Power Supply: 24V DC from backplane

• Current Consumption: 30 mA typ. (logic), 80 mA typ. (sensor supply)

• Operating Temperature: -25°C to +60°C

• Protection Rating: IP20

• Dimensions: 12.5 mm width × 99 mm height × 88 mm depth

• Approvals: CE, cULus, ATEX, DNV GL

Functional Description

The X20DC2395 reads the state of field sensors (e.g., limit switches, proximity sensors, pushbuttons) and makes the data available to the X20 CPU via the X2X Link bus. Each input channel has a configurable digital filter to debounce noisy signals. The module can also generate a diagnostic interrupt when an error occurs (e.g., missing sensor supply). The inputs are compatible with type 1 (IEC 61131‑2) and type 3 sensors. The module includes a built‑in sensor power supply (24V DC, max 200 mA total) that is protected against overload and short circuits.

Integration with B&R Automation Studio

The module is configured within B&R Automation Studio, the integrated development environment for X20 systems. The I/O mapping is automatic; the user assigns variable names to each channel. The diagnostic data can be read as system status words. The module supports hot‑swap (replacement without powering down the rack) if the bus controller supports it.

Environmental and Compliance

The X20DC2395 operates in temperatures from -25°C to +60°C (vertical mounting) and withstands vibration of 5g (10–150 Hz) and shock of 30g. The module is conformal coated for moisture resistance. It is certified for use in hazardous locations (ATEX Zone 2) and marine applications (DNV GL).

Typical Applications

This module is used in machine control (pick‑and‑place, packaging), conveyor systems, printing presses, and test stands. Its narrow 12.5 mm width allows high channel density in control cabinets.

Conclusion

The B&R X20DC2395 offers reliable, high‑density digital input acquisition with flexible filtering and diagnostics, making it a standard building block for X20‑based automation systems.