Description
Allen-Bradley 1771-ASB Remote I/O Adapter Module
The Allen-Bradley 1771-ASB connects your PLC to remote I/O racks. It lets you place I/O closer to machines, saving wiring costs. This reliable module works with PLC-5 systems.
Technical Specifications
Brand: Allen-Bradley
Model: 1771-ASB
Series: PLC-5
Type: Remote I/O Adapter
Data Speed: 57.6K, 115K, 230K bps
Max Distance: 10,000 ft at 57.6K baud
Chassis Slots: 4, 8, 12, 16, or 32
Voltage: 5V DC
Current: 1.0 Amp
Power Use: 5.2W
Operating Temp: 0 to 60°C
Weight: 1.9 lbs (0.9 kg)
Certifications: UL, CSA, CE, Marine
How It Works
The 1771-ASB module sits in a remote chassis. It talks to the main PLC over a special cable. It reads inputs and sets outputs in the remote rack. This means you can control machines far from the main controller.
Installation Guide
Install the 1771-ASB in the left slot of the 1771 chassis.
Use Belden 9463 cable (or equal).
Put end resistors on both ends of the cable.
Set the data speed switch to match your system.
Set the chassis address with the rotary switches.
Status Lights
ACTIVE (Green): Working normally
ADAPTER FAULT (Red): Module problem
I/O RACK FAULT (Red): Problem in I/O rack
Warranty & Shipping
We provide a 12-month warranty on this product.
We ship worldwide using FedEx, UPS, and DHL.
Frequently Asked Questions
- Q: What is the main job of the 1771-ASB?
A: It lets a PLC-5 controller talk to I/O modules in remote chassis over long distances. - Q: What cable should I use with this module?
A: Use Belden 9463 cable (often called “Blue Hose”) or an equivalent shielded cable. - Q: How many remote racks can I connect?
A: You can connect multiple remote racks in a daisy-chain configuration. - Q: What do the end resistors do?
A: They prevent signal reflection and ensure reliable communication on the network. - Q: Can I use this with modern ControlLogix systems?
A: It is designed for PLC-5 systems, but may work with some modern controllers using appropriate interfaces.
Compare With Other Modules
The 1771-ASB adapter works with various 1771 I/O modules like the 1771-IM Digital Input or the 1771-IN AC Input module. It enables these modules to be used remotely from the main controller.
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