PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-A2B is an 8-slot I/O Chassis designed for the PLC-5 control architecture. It provides physical mounting and backplane connectivity for compatible 1771 series input and output modules. Internal backplane traces route power and data between installed I/O modules and the system processor or adapter. The open-style assembly supports back-panel mounting inside an industrial electrical enclosure.
This chassis accommodates up to eight single-slot 1771 modules or paired multi-slot hardware assemblies. Backplane power distribution delivers up to 16 Amperes at 5 Volts DC to active slot positions. The unit operates within industrial shock ratings of 15 g operational and 30 g nonoperational. Vibration tolerance reaches 2 g over a frequency range of 10 to 500 Hertz during service.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
|---|
| Weight | 13.63 lbs (6.18 kg) |
|---|
| Module Type | I/O Chasis |
|---|
| Number of Module I/O Slots | 8 Slots |
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| Max Backplane Current (at 5 Volts DC) | 16 Amperes |
|---|
| Mount Type | Back Panel |
|---|
| Enclosure Type | Open Style |
|---|
| Operating Shock | 15 g |
|---|
| Nonoperating Shock | 30 g |
|---|
| Vibration | 2 g (at 10-500 Hertz) |
|---|
| Location | Stand-Alone |
|---|
| UPC | 10612598123619 |
|---|
TECHNICAL INFORMATION
Features
- Provides eight dedicated module slots for Allen-Bradley 1771 I/O and processor hardware.
- Distributes up to 16 Amperes of backplane current at 5 Volts DC.
- Features an open-style chassis configuration engineered for standard back-panel installation.
- Withstands 15 g operating shock and 2 g operational vibration up to 500 Hertz.
- Maintains integrated backplane communication lines across all module slots.
TECHNICAL INFORMATION
Applications
- Allen-Bradley PLC-5 programmable logic controller racks.
- Remote I/O station assembly with 1771 communication adapter modules.
- Centralized industrial I/O rack installations in control cabinets.
TECHNICAL INFORMATION
Connections / Interfaces
- Eight parallel 1771 backplane card-edge module connectors.
- Dedicated power supply input connection points for 5V DC backplane distribution.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the chassis directly to a flat, rigid enclosure back panel using appropriate hardware.
- Ensure adequate spacing around the open frame to maintain proper thermal convection.
- Secure grounding connections before installing processor, adapter, or input/output modules.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley PLC-5 processors and 1771 series I/O modules.
- Compatible with 1771 remote I/O adapter modules.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley PLC-5 processors and 1771 series I/O modules. Compatible with 1771 remote I/O adapter modules.
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
How many module slots does the Allen-Bradley 1771-A2B provide?
The 1771-A2B chassis provides eight module slots for 1771 series I/O, processor, or adapter hardware.
What are the backplane power specifications for the 1771-A2B chassis?
The backplane delivers a maximum current capacity of 16 Amperes at 5 Volts DC.
What is the market reference price for the 1771-A2B?
Observed market reference pricing is approximately $129.00 USD for refurbished units. This figure is an indicative market reference only and is not a final quotation.
