- Sixteen-slot Series B chassis for 1771 I/O and PLC-5 systems
- Backplane links installed modules with the processor or I/O adapter
- Backpanel mounting with documented wiring and grounding clearances
The Allen-Bradley 1771-A4B is a sixteen-slot Series B I/O chassis for compatible PLC-5 and 1771 hardware.
Its backplane provides the communication path between the installed modules and the processor or remote-I/O adapter.
Confirm addressing mode, slot plan, power arrangement, module compatibility, grounding, enclosure clearance, and wiring depth before replacement.
Availability, condition, price, and shipping time for Allen-Bradley 1771-A4B PLC-5 16-slot chassis are confirmed during quotation.
Allen-Bradley 1771-A4B PLC-5 16-Slot I/O Chassis Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Map processor or adapter and I/O modules to the documented slots
- Preserve one-slot, two-slot, or half-slot addressing requirements
- Check module keying, wiring arms, current, and controller support
- Select the approved power-supply arrangement for the installed chassis
- Calculate total backplane current for every module
- Bond the chassis and enclosure according to industrial grounding guidance
- Allow extra depth for wiring arms, conductors, and connectors
- Inspect backplane connectors, card guides, mounting holes, and corrosion
- Record the Series B label and complete module inventory before service
- PLC-5 machine and transfer-line control with centralized 1771 I/O
- Material-handling and packaging systems retaining 1771 racks
- Legacy process-control installations using local or remote 1771 I/O