• Allen-Bradley 1771-ASB
  • Allen-Bradley 1771-ASB
  • Allen-Bradley 1771-ASB
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Allen-Bradley 1771-ASB PLC-5 Remote I/O Adapter Module

Allen-Bradley 1771-ASB PLC-5 Remote I/O Adapter Module

The Allen-Bradley 1771-ASB is a Remote I/O (RIO) adapter module designed for the 1771-series I/O chassis. It serves as a critical interface between remote I/O racks and PLC-5 programmable controllers,...

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Availability: In stock

SKU: 1771-ASB
Vendor: Allen-Bradley
Category: Remote I/O Adapter Module
Related Series:

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The Allen-Bradley 1771-ASB is a Remote I/O (RIO) adapter module designed for the 1771-series I/O chassis. It serves as a critical interface between remote I/O racks and PLC-5 programmable controllers, enabling distributed control architectures. This module supports a wide range of I/O densities, including 8-, 16-, and 32-point modules, and provides flexible addressing options to optimize the I/O image table.

Features

  • Supports 1/2-slot, 1-slot, and 2-slot I/O addressing modes.
  • Compatible with communication distances up to 10,000 feet (3,048 meters) at 57.6K baud.
  • Integrated diagnostic LEDs for monitoring adapter status, I/O rack faults, and communication activity.
  • Supports a wide variety of intelligent and specialized I/O modules.
  • Includes field wiring arm and configuration jumpers for rapid deployment.

Applications

  • Power Generation & Utilities: Turbine control, balance of plant (BOP), and auxiliary monitoring.
  • Material Handling & Logistics: Distributed I/O for transfer lines and near-machinery control.
  • Process Manufacturing: Distributed I/O clusters for chemical and refinery plant automation.
  • Automotive Production: Real-time sensor and actuator monitoring over extended distances.

Technical Specifications

Model 1771-ASB
Manufacturer Allen-Bradley
Backplane Current 1.0A at 5V DC
Power Dissipation 5 Watts
Thermal Dissipation 17.06 BTU/hr
Operating Temperature 0 to 60 degC (32 to 140 degF)
Storage Temperature -40 to 85 degC (-40 to 185 degF)
Relative Humidity 5% to 95% (non-condensing)
Weight 0.74 kg

Installation Guidelines

  • Power Down: Always remove power from the 1771 I/O chassis backplane and field wiring arm before installing or removing the module.
  • Slot Placement: The 1771-ASB must be installed in the leftmost slot of the 1771 I/O chassis, which is reserved for adapter or processor modules.
  • Chassis Keying: Use plastic keying bands on the backplane connector to ensure correct module insertion. For the 1771-ASB, place bands between pins 54 and 56 (upper) and pins 16 and 18 (lower).
  • Environment: Ensure the module is installed in a clean, dry environment within the specified temperature and humidity ratings to prevent premature failure.

FAQs

What is the 1771-ASB?

The Allen-Bradley 1771-ASB is a Remote I/O (RIO) Adapter Module for 1771-series I/O chassis, primarily designed to interface remote racks with PLC-5 processors.

What are the key features of the 1771-ASB?

It supports up to 10,000 feet of cable (at 57.6K baud), 1-slot and 2-slot addressing modes, and diagnostics via LEDs (Active, Adapter Fault, I/O Rack Fault).

What is the difference between Series A and Series B?

Series B increased troubleshooting LEDs from 5 to 10 and increased internal RAM from 13K to 24K bytes.