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B&R X20DI9371
Product Series: B&R X20 Series (Compact I/O System)
Product Introduction:
The B&R X20DI9371 is an 8-channel digital input module from the B&R X20 compact I/O system. It accepts 24 VDC digital signals from field sensors, switches, and encoders. The module supports both sink (NPN) and source (PNP) input configurations, making it universally compatible with all standard field device types. It connects to the X20 backplane via the M12 connector interface.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Number of Channels | 8 digital inputs |
| Input Type | Sink (NPN) / Source (PNP) — configurable per channel group |
| Input Voltage (High) | 15 VDC to 30 VDC (24 VDC nominal) |
| Input Voltage (Low) | 0 V to 5 VDC |
| Input Current (High) | ~3 mA (typical) |
| Input Current (Low) | < 1 mA |
| Isolation Voltage | 500 V DC (channel to channel, channel to backplane) |
| Protection Class | IP20 (front side), IP67 (when mated with M12 connector) |
| Connector Type | M12, 8-pin, A-coded |
| Supply Voltage | 24 VDC via backplane bus |
| Power Consumption (max) | ~1.8 W |
| Operating Temperature | -25 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5 % to 95 % (non-condensing) |
| Dimensions (W × H × D) | 25 mm × 90 mm × 75 mm |
| Weight | ~80 g |
| Certifications | CE, UL, CSA, ATEX (Zone 2) |
Functional Features:
- 8 digital input channels with configurable sink/source operation
- Optical isolation per channel for maximum noise immunity
- Hysteresis of ~2 V to prevent false triggering from signal noise
- LED status indicators per channel (green = signal present, off = no signal)
- Short-circuit protection on all input channels
- Reverse polarity protection on each input
- Diagnostic feedback to controller for open-wire and short-circuit detection
Structural Features:
- Housing material: Polycarbonate (PC) + glass fiber reinforced (GF)
- M12 8-pin A-coded connector on the front
- Backplane connector on the bottom for X20 system integration
- DIN rail mountable (35 mm TS 35)
- Compact form factor: 25 × 90 × 75 mm
Working Principle:
The module reads the voltage state at each input terminal via the backplane bus from the B&R controller. For sink (NPN) mode: the field device (NPN sensor) switches the input to GND when active; the module detects a LOW signal as “active”. For source (PNP) mode: the field device (PNP sensor) switches +24 VDC to the input when active; the module detects a HIGH signal as “active”. Internal optocouplers provide galvanic isolation between the field side and the backplane logic side. A comparator circuit with hysteresis determines the logic state and filters out noise.
Advantages & Highlights:
- Dual sink/source compatibility — eliminates the need for separate NPN and PNP input modules
- Optical isolation per channel — ensures reliable operation in high-EMI environments
- Configurable via software (Automation Studio) — no hardware jumpers required
- Ultra-fast response time — suitable for high-speed encoder signals
- M12 connector — IP67 protection, tool-free wiring
Applicable Industries:
- Machine tool automation
- Robotics
- Conveyor & sorting systems
- Injection molding machines
- CNC machines
- Print & packaging machinery
- Warehouse automation
Installation Requirements:
- Mount on 35 mm DIN rail (EN 60715)
- Use M12 8-pin A-coded cables for field connections (max 100 m)
- Tighten M12 connector to torque of 1.5 Nm
- Configure sink/source mode in Automation Studio to match the connected field devices
- Ensure 24 VDC power is supplied via the X20 backplane
Usage Precautions:
- Do not apply voltage > 30 VDC to any input terminal
- Do not apply negative voltage to input terminals
- When using source (PNP) sensors, ensure the sensor’s supply voltage matches the module’s input range (15–30 VDC)
- When using sink (NPN) sensors, ensure the common line is properly connected to the module’s M-terminal
- Do not leave inputs floating — always connect to a defined voltage level
- Check hysteresis settings in software for noisy environments
