Ranked by the number of enquiries we received in the last 30 days. A high count usually means the part is failing in the field or going out of support — worth stocking before you need it.
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A fixed DH+ path distinguishes 1785-L20B from PLC-5 controllers whose control-network ports are fully configurable; Rockwell Automation lists this catalog as discontinued.
Allen-Bradley 1785-L80C15 is a 100 K-word ControlNet 1.5 PLC-5/80C15 processor supporting 128 map entries, ninety-two devices, and redundant media.
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Why a part trends
This ranking comes from our own enquiry log, not from page views. When the same part number arrives from several unrelated plants in the same month, it is usually one of two things: a component reaching the end of its service life across an installed base, or a system that has just gone out of manufacturer support.
Either way it is a signal worth acting on. Parts that trend here tend to get harder to find over the following quarters, and prices move with scarcity rather than with a list.
If something you run appears on this page, it is worth holding a spare now. Ask your account manager to review your installed base against this list — we do it free for existing customers.