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Technical specifications for
1771-ASB
The Allen-Bradley 1771-ASB is a Universal Remote I/O (RIO) Adapter Module designed for PLC-5 / 1771 I/O systems to enable efficient communication with remote I/O racks over long distances.
Communication & Interface
• Communication port: Remote I/O (RIO) adapter for distributed I/O networks.
• Communication rates: 57.6 kbps, 115 kbps, and 230 kbps for flexible performance.
• Supports up to 32 remote I/O adapter devices on the network.
• Connector: 1771-WB wiring arm (field wiring interface).
• Recommended cabling: Belden 9463 or equivalent shielded twisted pair.
Electrical
• Backplane current load: 1.0 A @ 5 V DC from the I/O chassis backplane.
• Power dissipation: Maximum ~5.2 W.
Mechanical
• Mounting: In-chassis, typically in the left-most slot of a 1771 I/O chassis.
• Weight: Approximately 1.9 lbs (0.9 kg).
• Dimensions: 3.5″ × 6.5″ × 2.0″ (89 × 165 × 51 mm).
Environmental
• Operating temperature: 0 °C to 60 °C (32 °F to 140 °F).
• Storage temperature: –40 °C to +85 °C (–40 °F to 185 °F).
• Relative humidity: 5 % to 95 % non-condensing.
• Noise immunity: Meets NEMA ICS 2-230 standards.
Operational Features
• Long cable reach: Up to 10,000 ft at 57.6 kbps and reduced distances at higher baud rates.
• Diagnostics: LED indicators for Active, Adapter Fault, and I/O Rack Fault status.
• Flexible addressing and remote I/O support for distributed automation.
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