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Knowledge Base > Discontinued Products > 8 In

What is the maximum recommended length of an RS-232 cable?

Typically, 50 feet is the maximum length for reliable communications over RS-232. Some laptop PC’s use the low power, low emission RS-562 instead of RS-232. With RS-562 your cable run will be much shorter than with RS-232. You can use a low cost RS-232 buffer/repeater amplifier to extend both RS-232 and RS-562 maximum cable lengths. There are many manufacturers of these types of products. Here are links to a few US sources:

B & B Electronics
R. E. Smith
Integrity Instruments

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