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1771-ASB | Allen Bradley | 1771ASB PLC-2/3/5

  • Brand/ Manufacturer:

    Allen Bradley
  • Dimensions:

  • Weight:

  • Country of Origin: :

    United States
  • Description:

    Remote I/O Adapter Module

Mfr. Part Number:



         Allen-Bradley / Rockwell Automation


Allen-Bradley 1771-ASB Universal Remote I/O Adapter Module for PLC-2/3/5

Full Description:

Allen-Bradley 1771-ASB Universal Remote I/O Adapter Module for PLC-2, PLC-3 & PLC-5. 

Communication Rate: 57.6 kbit/s, 115 kbit/s, 230 kbit/s; Connectors: 1771-WB wiring 

arm;Cable: Belden 9463; Backplane Current Load: 1.0A @ 5V

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The Allen-Bradley 1771-ASB is a PLC 5 Universal Remote I/O Adapter Module. It interfaces with I/O modules in a 1771 I/O chassis with a Remote I/O scanner port for a processor over an I/O link.

Using it instead of direct wiring reduces startup, installation, and maintenance costs by the I/O being closer to the actuators and sensors. It is compatible with 32 I/O-adapter devices via the I/O link and it uses 82 Ohm or 150 Ohm terminating resistor.

The 1771-ASB module has a communication rate of 57.6 Kbps, 115 Kbps, and 230 Kbps and it weighs 1.9 pounds. It has a backplane current load of 1 A at 5 Volts DC and a maximum power dissipation of 5.2W. It requires a remote I/O adapter port for connection.

For installation, it must be mounted in the left-most slot of the 1771 chassis with the I/O modules controlled by a PLC 5 processor. For wiring, the 1770-CD Belden 9463 or equivalent cable must be used. The 1771-ASB module has Active, Adapter Fault, and I/O Rack fault diagnostic Indicators, 2 switch assemblies, and a field wiring arm.

It provides faster data transmission and backplane scanning up to 2500 feet at 230.4K Baud. It supports serial communication and reads/writes data in parallel form. It supports 4, 8, 12, 16, or 32-slot I/O chassis and 1 and 2-slot I/O addressing. The 1771-ASB improves scan time and I/O image space savings by scanning all slots except the last 4. It eases troubleshooting with its enhanced diagnostics features.


Rockwell Automation



Part Number/Catalog No.


Module Type

I/O Adapter Module

Product Family:

SLC 500


Universal Remote I/O Adapter

Product Type:

RIO Adapter Module

Rate of Communication

57.6 kbit/second, 115 kbit/second, 230 kbit/second


Wiring Arm 1771-WB

Programming software:

RSLogix5 software

Backplane Current (at 5 Volts)

1.0 Amps

Communication Port:

Remote I/O (RIO)

Operating Temperature

32°F to 140°F (0°C to 60°C)

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