Finding Obsolete HMI and Display Panels: What to Check Before Buying

Obsolete industrial HMI panel with blank screen on control console, representing discontinued Siemens and Allen Bradley operator interface replacements

A blank screen doesn’t mean it’s all over 

When an HMI screen goes dark, production tends to follow. 
Your team calls the OEM and hears the same line: “That model is discontinued.” 

That’s where we step in. At obso automation, we specialise in sourcing hard‑to‑find and obsolete operator panels and display modules from Siemens, Allen Bradley and other leading brands, quickly and responsibly. 

Obsolescence doesn’t need to cause panic or downtime; it just needs the right expertise. 

WhyHMIanddisplaypanelsvanish fromproduction 

Panel manufacturers refresh their ranges every few years. Technology evolves, touch‑screens improve, firmware updates change communication protocols, and older HMIs quietly disappear from catalogues. 

The result? A common display such as a Siemens TP177A suddenly becomes “unsupported,” even though thousands of machines still depend on it. 

Replacing with a new series often means re‑engineering I/O connections, rewriting code or re‑validating software, all expensive, time‑consuming jobs most maintenance teams don’t need. 

Howwekeepyourmachinesrunning 

  • WelocategenuinenewandrefurbishedHMIpanels worldwide through our trusted, tried and tested, global network. 
  • Wecheckcompatibility including firmware and revisions. 
  • Wesupplytestedunitswithwarranty. Every panel we ship has been bench‑tested for display, touch and communication functionality. 
  • We move fast. With stock and partner sites across the world including the UK, Germany and Italy, we cut down delivery lead times from weeks to days. 

3 things to check before you order 

  1. Partnumberandrevision 
    Many HMIs share models but differ by power rating or firmware. Check the full chart. 
  1. Firmwareversion 
    Critical for communications over Profibus, Profinet, EtherNet/IP or DH‑485. 
  1. Includedmemorycardsorbezels 
    Sometimes customers replace the panel but forget these essentials. 

Send us those details and we’ll confirm the best match and ship you the right unit the first time. 

Safetyandqualitycomefirst 

  • We only work with trusted testing partners and verified industrial‑grade suppliers. 
  • Every unit is checked for backlight strength, touchscreen response and firmware integrity before we dispatch it to you 

That’s how we protect your production and our reputation. 

Planningahead 

If your machines still run on older HMI generations, talk to us now. We can identify vulnerable models and recommend back‑up stock before any failure occurs.  

This is far cheaper, quicker and less stressful than panicking and reacting to a failure! 

Summary 

Losing an HMI doesn’t have to mean losing production.  
obso finds obsolete and discontinued display panels fast, keeping your plants in the UK. 

Needareplacementnow?Sendusthepartnumberandaphotoofthelabel, we’lltrackitdownforyou. 

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top