Allen Bradley 1747-L542/B SLC 5/04 Processor

FAQ

Q1: What is the Allen Bradley 1747-L542/B?
A: It is a Series B SLC 5/04 Processor designed for Allen Bradley SLC 500 programmable controller systems.

Q2: How much memory does the 1747-L542/B have?
A: It provides 32K words of battery-backed user memory, with 28K words available for program/data and 4K words for data only.

Q3: What communication interfaces are available?
A: It provides RS-232 on Channel 0 and Data Highway Plus (DH+) on Channel 1.

Q4: What is the maximum I/O capacity?
A: The processor supports up to 4,096 discrete inputs and 4,096 discrete outputs, subject to system limitations.

Q5: What is the typical program scan time?
A: The typical program scan time is approximately 0.9 ms/K.

Q6: How many local chassis can it support?
A: It supports up to 3 local chassis with a maximum of 30 I/O slots.

Q7: Is the 1747-L542/B discontinued?
A: Yes. The 1747-L542 processor family was discontinued by Rockwell Automation effective March 31, 2024.

Q8: What are the dimensions and weight?
A: The commonly listed dimensions are approximately 35 × 145 × 142 mm, with a weight of approximately 0.32 kg.

1747-L542/B Allen Bradley

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