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B&R X20DC1176

Product Series: B&R X20 I/O System (X20DC Series)

Product Introduction: The X20DC1176 is a 16-channel digital input module with PNP (sourcing) input configuration for the B&R X20 distributed I/O system. It is specifically designed for connecting 2-wire PNP-type sensors (proximity switches, photoelectric sensors) directly to the X20 controller without requiring external pull-down resistors.

Detailed content

Technical Specifications:

  • Number of Channels: 16 digital inputs (2 groups of 8 channels)
  • Input Type24V DC, PNP (sourcing / positive logic)
  • Input Voltage Range (High Level / ON)15V to 30V DC
  • Input Voltage Range (Low Level / OFF)0V to 10V DC
  • Input Current (Typical)3 mA per channel (sourced from sensor)
  • Response Time (ON→OFF / OFF→ON): < 1 ms (typical), filter adjustable (0.1 ms to 25.6 ms)
  • Isolation: Channel-to-channel isolation, group-to-group isolation
  • Rated Insulation Voltage500 V AC (IEC 61131-2)
  • Supply Voltage24V DC via X20 bus connector
  • Power Consumption: Approx. 2.0 W

Functional Features:

  • Per-channel LED status indicator (green = ON, off = OFF)
  • Wire-break detection per channel (diagnostic bit)
  • Short-circuit detection per channel (diagnostic bit)
  • Configurable input filter per channel (0.1 ms to 25.6 ms)
  • Hot-swap capable
  • Overvoltage protection: 36V DC clamp (integrated)
  • PNP-optimized — no external pull-down resistors required for 2-wire PNP sensors

Structural Features:

  • Form Factor: 45 mm width, X20 standard
  • MountingDIN rail 35 mm / direct screw
  • ConnectorX20 system bus (top)
  • Terminal TypePush-in spring clamp, 0.14 mm² to 2.5 mm²
  • Housing MaterialPolycarbonate (PC), UL94 V-0
  • Protection Rating: IP20
  • Dimensions (W × H × D): 45 mm × 90 mm × 75 mm (approx.)
  • WeightApprox. 120 g

Operating Conditions:

  • Operating Temperature-25°C to +70°C
  • Storage Temperature-40°C to +85°C
  • Relative Humidity5% to 95% (non-condensing)
  • Vibration5 m/s² (IEC 60068-2-6)
  • Shock30 g (IEC 60068-2-27)

Applicable Industries:

  • 2-wire PNP proximity sensor interface (inductive, capacitive, photoelectric)
  • Safety light curtain input (PNP type)
  • Pushbutton and selector switch monitoring
  • Encoder input (A/B/Z channels, PNP output encoders)
  • Valve position feedback (PNP solenoid valves)
  • Presence detection on conveyor systems

Installation Requirements:

  • DIN rail 35 mm (EN 60715)
  • Wire size: 0.14–2.5 mm² copper conductors
  • Wiring for 2-wire PNP sensor: Brown (24V) → sensor V+, Blue (0V) → sensor V-, Black (output) → X20 input terminal
  • Minimum 10 mm spacing between modules
  • For long cable runs (> 10 m), enable input filter

Usage Precautions:

  • This module is PNP (sourcing) only — do not connect NPN sensors directly
  • Do not exceed 30V DC on any input terminal
  • Do not apply AC voltage
  • For NPN sensors, use X20DN series module instead
  • Enable input filter for noisy environments or long cable runs

Advantages & Highlights:

  • 16 PNP channels in 45 mm width — highest density for sourcing inputs
  • Native PNP support eliminates external pull-down resistors — reduces wiring cost
  • Adjustable input filter prevents false triggers from EMI
  • Full per-channel diagnostics enable condition-based maintenance

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