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B&R X20HB2881
Product Series: B&R X20 Series (Accessories)
Product Introduction:
The B&R X20HB2881 is a 10-position terminal base for the B&R X20 compact I/O system, functionally equivalent to the X20HB2880 but designated as a separate part number for ordering and configuration differentiation within the B&R product catalog. It provides screw-type field connections for X20 modules and mounts on a DIN rail, connecting to the X20 backplane bus.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Product Type | Terminal base (passive distribution base) |
| Number of Positions | 10 |
| Compatible Modules | All X20 series I/O and communication modules |
| Terminal Type | Screw terminals, 2.5 mm² max wire cross-section |
| Wire Gauge | 22 AWG to 14 AWG (0.25 mm² to 2.5 mm²) |
| Tightening Torque | 0.5 Nm |
| Connector to Backplane | X20 backplane connector (bottom) |
| Supply Voltage | 24 VDC via backplane bus |
| Protection Class | IP20 |
| Operating Temperature | -25 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Dimensions (W × H × D) | 90 mm × 90 mm × 75 mm |
| Weight | ~120 g |
| Mounting | 35 mm DIN rail (TS 35, EN 60715) |
| Certifications | CE, UL, CSA |
Functional Features:
- 10 screw-type terminal positions for wiring field devices
- Passive distribution — no active components; all I/O processing in the X20 module
- Backplane power and signal distribution to all connected X20 modules
- Labeling strips included for wire identification
- DIN rail 35 mm mounting
Structural Features:
- Housing: Polyamide (PA) + glass fiber (GF)
- Color: Light gray (RAL 7035)
- Captive screw design — screw remains in terminal block
- Bottom-mounted backplane connector
- Dimensions: 90 × 90 × 75 mm
Working Principle:
Identical to X20HB2880. The base receives 24 VDC power and communication signals from the X20 backplane. When an X20 module is inserted, signals are routed from the backplane through the base to the module. Field wiring on the screw terminals connects directly to the module’s I/O channels.
Advantages & Highlights:
- Same functionality as X20HB2880 — selected based on project-specific part numbering requirements
- Screw-terminal wiring — familiar and reliable for electricians
- 10-position capacity — flexible module combination
- Robust PA+GF housing — high mechanical strength
Applicable Industries:
- OEM machine building
- System integration
- Panel manufacturing
- Process automation
Installation Requirements:
- 35 mm DIN rail (EN 60715)
- 0.25–2.5 mm² wire only
- Screw torque: 0.5 Nm
- Wire strip length: 8–10 mm
Usage Precautions:
- Do not use wire > 2.5 mm²
- Verify module compatibility in B&R Automation Studio hardware configuration
- Do not exceed 10 modules per base
