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Allen-Bradley 1771-OBN Digital DC Output Module

Product Description

The 1771-OBN is a 16-channel digital DC output module from Allen-Bradley’s 1771 I/O series, designed for PLC-5 and SLC 500 control systems. It provides isolated 24V DC outputs for industrial automation applications, supporting control of devices like relays, solenoids, and indicators .

Key Features

High-Density Outputs
- 16 isolated DC output channels (24V DC, 0.5A per channel) .
- Sourcing (PNP) configuration, compatible with PLC-5 and SLC 500 controllers .
Robust Industrial Design
- DIN rail or panel mounting (IP20-rated enclosure) .
- LED status indicators for per-channel diagnostics .
Fast Response & Protection
- Response time ≤2 ms for high-speed control .
- Short-circuit and overcurrent protection .
Compatibility & Integration
- Works with PLC-5, SLC 500, and DH+/RS-232 communication protocols .
- Supports hot-swapping (RIUP compliant) for reduced downtime .
Environmental Adaptability
- Operating temperature: -20°C to +60°C .
- Storage temperature: -40°C to +85°C .

Technical Specifications

Parameter	Value
Model	1771-OBN
Output Type	16 sourcing (PNP)
Voltage Range	24V DC ±10%
Current per Channel	0.5A
Isolation Voltage	1,500V AC
Power Consumption	24V DC ±10%
Dimensions	120 × 80 × 40 mm
Weight	~1 kg

Applications

Motor Control: Activating contactors and solenoids .
Process Automation: Valve and relay switching.
HVAC Systems: Fan/pump control .

Installation & Usage Notes

Wiring
- Use shielded cables for noise immunity.
- Ensure proper grounding to avoid signal interference .
Configuration
- Program via RSLogix 500 for SLC 500 systems .
Maintenance
- Monitor LED indicators for fault detection .