Allen-Bradley 1771-DA Series A ASCII I/O Communication Module

The Allen-Bradley 1771-DA Series A is an intelligent ASCII I/O communication module designed for the Allen-Bradley 1771 I/O platform and PLC-5 programmable controllers. The module provides bidirectional serial communications between the PLC processor and external ASCII devices including barcode readers, printers, operator terminals, scales, and serial instrumentation. Data is exchanged using block transfers, making the 1771-DA a versatile communications interface for legacy Allen-Bradley automation systems.

Confirmed Specifications

  • Manufacturer: Allen-Bradley (Rockwell Automation)
  • Catalog Number: 1771-DA
  • Product Name: ASCII I/O Module
  • Series: A
  • Firmware Revision: B
  • Product Type: ASCII I/O Communication Module
  • PLC Platform:
    • Allen-Bradley 1771 I/O
    • PLC-5
    • Compatible 1771 systems supporting block transfers
  • Communication Interfaces:
    • RS-232-C
    • Allen-Bradley Long Line Interface
  • Selectable Baud Rates:
    • 110
    • 300
    • 600
    • 1200
    • 2400
    • 4800
    • 9600 baud
  • Buffer Memory: 3 KB (1.5K words)
  • Module Input Power: 2 VA Maximum
  • Backplane Current Draw: Approximately 1.3 A
  • Compatible Wiring Arm: 1771-WN
  • Mounting: 1771 I/O Chassis
  • Country of Manufacture: USA
  • UL Listed
  • Designed for industrial serial communications between PLCs and ASCII devices

Typical Applications

  • PLC-to-printer communications
  • Barcode scanner interfaces
  • Industrial terminals
  • Operator interface devices
  • Weigh scale communications
  • Serial instrumentation
  • Label printing systems
  • Manufacturing automation
  • Process control
  • Legacy PLC-5 communication systems

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- Most orders are shipped in 1 business day or Less via 1-5 day shipping. However, depending on quantity of orders some orders could take up to 2 business days to ship.