Allen-Bradley 1785-LT PLC-5/15 Processor Module

FAQ

Q1. What is the 1785-LT used for?
It is a PLC-5/15 processor used for basic industrial automation control tasks such as machine sequencing and small production systems.

Q2. Is it a CPU or communication module?
It is a CPU (processor module), not a communication interface.

Q3. How much memory does it have?
It has 6K words of SRAM, expandable up to 14K words.

Q4. What networks does it support?
It supports DH+, Remote I/O (RIO), and serial communication (RS-232/422/423).

Q5. What is its I/O capacity?
Up to 512 I/O points total depending on configuration.

Q6. What chassis does it use?
It installs into a 1771 I/O chassis used in PLC-5 systems.

Q7. Is it suitable for large systems?
No, it is one of the smaller PLC-5 processors, intended for simpler applications.

Q8. Is it still in production?
No, it is a legacy PLC-5 controller used for maintaining existing installations.

1785-LT Allen Bradley

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