Allen-Bradley 1785-L80B PLC-5/80 Processor Module

FAQ

Q1. What is the 1785-L80B used for?
It is a PLC-5/80 high-performance processor used for large-scale industrial automation and distributed control systems.

Q2. How much memory does it have?
It provides 100K words of battery-backed SRAM for program and data storage.

Q3. What is its maximum I/O capacity?
It supports up to 3072 I/O points (or 3072 inputs + 3072 outputs in complementary mode).

Q4. What communication interfaces does it support?
It includes 4 DH+/Remote I/O channels and 1 serial port (RS-232/422/423).

Q5. What chassis does it use?
It is installed in a 1771 PLC-5 I/O chassis system.

Q6. What is its role in a control system?
It acts as a central controller coordinating local and remote I/O across multiple racks and networks.

Q7. Is it suitable for modern automation systems?
No, it is a legacy PLC-5 controller, mainly used for maintaining existing industrial installations.

Q8. Why is it considered high-end in PLC-5 series?
Because it has the largest memory, highest I/O capacity, and most communication channels in the PLC-5 family.

1785-L80B Allen Bradley

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