Product Description
Product Overview
The Allen-Bradley 1771-ASB is a PLC-5 Universal Remote I/O Adapter Module designed to interface remote I/O modules with programmable logic controllers (PLCs) in the PLC-5 family. Manufactured by Allen-Bradley, a brand under Rockwell Automation renowned for its industrial automation solutions, this module facilitates communication between a PLC-5 processor’s remote I/O scanner port and I/O modules housed in a 1771 I/O chassis. It supports the Remote I/O (RIO) protocol, enabling data transmission over long distances—up to 10,000 feet at 57.6 Kbps or 2,500 feet at 230.4 Kbps—via a daisy-chain topology using Belden 9463 cable or equivalent. The 1771-ASB is typically installed in the leftmost slot of the chassis and supports flexible I/O addressing (½-slot, 1-slot, or 2-slot), making it suitable for distributed control applications in industries like manufacturing and process automation. As a discontinued product, it remains essential for maintaining legacy PLC-5 systems.
Technical Information
| Item | Specifications |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Series | PLC-5 (1771) |
| Model/Part Number | 1771-ASB |
| Description | PLC-5 Universal Remote I/O Adapter Module |
| Communication Rate | 57.6 Kbps, 115 Kbps, 230 Kbps |
| Transmission Distance | 10,000 ft at 57.6 Kbps; 2,500 ft at 230.4 Kbps |
| Backplane Current | 1 A at 5 VDC |
| Power Dissipation | 5 W |
| Connectors | 1771-WB wiring arm, RIO port |
| Operating Temperature | 0 °C to +60 °C (32 °F to +140 °F) |
| Dimensions | 114 mm H x 279 mm W x 38 mm D (4.5 in x 11 in x 1.5 in) |
| Weight | 0.86 kg (1.9 lb) |
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