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Allen-Bradley 1753-IB20XOB8 Guard PLC Digital I/O Module

Product Description

The 1753-IB20XOB8 is a Guard PLC digital I/O module designed for Allen-Bradley Guard PLC safety systems, providing 20 safety inputs and 8 standard outputs in a single module. It is part of the 1753 Guard PLC I/O series, which is TÜV-certified for SIL 3, Category 4, PLe safety standards, making it suitable for high-reliability industrial automation applications .

Key Features

High-Speed Safety I/O
- 20 safety inputs (24V DC) for emergency stop circuits, light curtains, and safety interlocks .
- 8 standard outputs for non-safety control functions .
Fast Ethernet Communication
- 100 Mbps built-in Ethernet with dual-port switch for daisy-chaining .
- Supports Guard PLC 1600 and 1800 safety controllers .
Robust Industrial Design
- Hot-swappable (RIUP compliant) for reduced downtime .
- DIN rail or panel mounting .
Diagnostics & Protection
- Per-point LED status indicators for troubleshooting .
- Short-circuit and overvoltage protection .
Compatibility
- Works with Guard PLC 1600 and 1800 controllers .

Technical Specifications

Parameter	Value
Model	1753-IB20XOB8
Input Type	20 safety inputs (24V DC)
Output Type	8 standard outputs
Communication	100 Mbps Ethernet
Isolation Voltage	1,500V AC (channel-to-ground)
Operating Temp.	0°C to +60°C
Protection Rating	IP20
Dimensions	Standard 1753 module size
Weight	~0.5 kg

Applications

Machine Safety Systems (emergency stops, light curtains) .
Process Automation (safety interlocks in chemical plants) .
Robotic Workcells (collaborative robot safety zones) .

Installation & Usage Notes

Wiring
- Use shielded cables for noise immunity .
- Ensure proper grounding to prevent signal interference .
Configuration
- Configure via Guard PLC handheld terminal or Studio 5000 .
Maintenance
- Regularly check terminal connections for corrosion .