PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-DXPS is a PLC-5 control coprocessor module. It executes custom code independently from the main processor scan. The module runs a real-time multitasking operating system based on OS/9. It supports software routines compiled in BASIC, C, or assembly languages.
Communication options include RS-232-C, RS-422-A, RS-423-A, and Ethernet TCP/IP protocols. The unit connects directly to Channel 3 of a PLC-5 controller. It also supports block-transfer transactions across the 1771 backplane. Field terminations interface using a standard 1771-WA wiring arm.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Communication Protocols | RS-232-C, RS-422-A, RS-423-A, Ethernet TCP/IP |
|---|
| Operating System | Real-Time Multitasking OS/9 |
|---|
| Supported Programming Languages | BASIC, C, Assembly |
|---|
| PLC Processor Interfacing | Block-Transfer, Direct Connection to Channel 3 |
|---|
| Maximum DC Off-State Current | 1.0 mA |
|---|
| Typical DC Signal Delay (On) | 33 +/- 6 ms (Contact), 3 +/- 2 ms (Wire-Fault) |
|---|
| Typical DC Signal Delay (Off) | 33 +/- 6 ms (Contact), 3 +/- 2 ms (Wire-Fault) |
|---|
| Pulse Capture Time | 50 to 9.999 microseconds |
|---|
| Compatible Wiring Arm | 1771-WA |
|---|
| Weight | 2.81 lbs (1.28 kg) |
|---|
TECHNICAL INFORMATION
Features
- Runs a real-time multitasking operating system based on OS/9.
- Supports application programming in BASIC, C, and assembly languages.
- Provides serial RS-232-C, RS-422-A, and RS-423-A communications.
- Includes an Ethernet TCP/IP interface for network connectivity.
- Connects directly to Channel 3 of the PLC-5 processor.
- Enables fast pulse capture within 50 to 9.999 microseconds.
TECHNICAL INFORMATION
Connections / Interfaces
- Direct connection to Channel 3 on a PLC-5 processor.
- Backplane interface via standard 1771 I/O chassis slot.
- Serial communication via RS-232-C, RS-422-A, or RS-423-A.
- Network connection through an Ethernet TCP/IP port.
- Field signal connection via 1771-WA wiring arm.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any compatible 1771 I/O chassis slot.
- Fasten the 1771-WA wiring arm securely to the chassis frame.
- Ensure power to the chassis is turned off during installation.
- Verify proper port cable pinouts before connecting serial devices.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 programmable logic controller systems.
- Allen-Bradley 1771 I/O chassis.
- Allen-Bradley 1771-WA wiring arm.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 programmable logic controller systems. Allen-Bradley 1771 I/O chassis. Allen-Bradley 1771-WA wiring arm.
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 protocols does the 1771-DXPS module support?
The 1771-DXPS supports RS-232-C, RS-422-A, RS-423-A, and Ethernet TCP/IP network communication protocols.
How does the 1771-DXPS coprocessor interface with the PLC-5 processor?
It communicates through standard block-transfer operations and via direct connection to Channel 3 of the PLC-5 processor.
What operating system and programming languages are supported on the 1771-DXPS?
The module runs the OS/9 real-time multitasking operating system and executes BASIC, C, and assembly programs.
What is the typical market reference price for the 1771-DXPS?
Observed market reference pricing is around 977 USD for refurbished units. This is an indicative market reference price only, not a final quotation.
