PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-DA PLC-5 ASCII I/O provides serial communication functionality for 1771 chassis systems. The unit integrates an RS-232-C port designed for asynchronous serial transmission. It includes 1.5 kilowords or 3 kilobytes of memory buffer storage. Supported serial communication rates span 110, 300, 600, 1200, 4800, and 9600 baud.
This module operates with an internal scan time between 1.3 and 5 milliseconds. Backplane current consumption reaches a maximum of 1.0 ampere. Field wiring connects through an Allen-Bradley 1771-WN wiring arm. Circuit boards feature protective conformal coating for environmental resistance. Storage temperatures range from -40 to 185 degrees Fahrenheit or -40 to 85 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Communication Protocol | RS-232-C |
|---|
| Rate of Communication | 110, 300, 600, 1200, 4800, 9600 baud |
|---|
| Memory Capacity | 1.5 Kilowords / 3 Kilobytes |
|---|
| Backplane Current | 1.0 A max |
|---|
| Module Scan Time | 1.3-5 ms |
|---|
| Wiring Arm | 1771-WN |
|---|
| Protective Coating | Conformal Coat |
|---|
| Storage Temperature | -40 to 185 °F (-40 to 85 °C) |
|---|
| Dimensions | 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm) |
|---|
| Weight | 2.13 lbs (0.96 kg) |
|---|
TECHNICAL INFORMATION
Features
- Provides RS-232-C serial communication protocol support.
- Selectable baud rates include 110, 300, 600, 1200, 4800, and 9600 baud.
- Onboard memory capacity of 1.5 kilowords or 3 kilobytes.
- Module scan execution rate ranges between 1.3 and 5 ms.
- Includes protective conformal coating on circuit assemblies.
TECHNICAL INFORMATION
Applications
- Serial communication between PLC-5 controllers and external ASCII devices.
TECHNICAL INFORMATION
Connections / Interfaces
- RS-232-C serial communication port interface.
- Terminal connections terminate at the 1771-WN wiring arm.
- Module connects directly to the PLC-5 1771 backplane for power and logic.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any available slot of a compatible 1771 chassis.
- Attach the 1771-WN wiring arm to establish field connections.
- Ensure the power supply can support the 1.0 A backplane current draw.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure serial transmission rates between 110 and 9600 baud.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley PLC-5 systems and 1771 I/O chassis.
- Requires the 1771-WN wiring arm for field wiring termination.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley PLC-5 systems and 1771 I/O chassis. Requires the 1771-WN wiring arm for field wiring termination.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What communication protocol does the Allen-Bradley 1771-DA support?
The 1771-DA supports RS-232-C serial communication with selectable baud rates from 110 to 9600 baud.
What is the backplane current draw for the 1771-DA?
The module requires a maximum backplane current draw of 1.0 ampere from the 1771 chassis.
Which wiring arm is compatible with the 1771-DA?
The 1771-DA utilizes the Allen-Bradley 1771-WN wiring arm for field wiring connections.
What is the reference price for the 1771-DA?
Commercial observations show reference pricing near $109.00 USD for refurbished units. This figure is an indicative market reference only and is not a final quotation.
