How to identify this generation
- 4100U is a distinct CPU/hardware generation between classic 4100 and 4100ES.
- Do not identify a panel as 4100ES based only on cabinet style.
- Manufacturer
- Simplex / Johnson Controls
- Family
- 4100 Series
- Generation
- 4100U
Simplex / Johnson Controls · 4100 Series
4100U Fire Alarm Panel Reference
Legacy Simplex 4100-generation platform that preceded 4100ES and remains common in existing facilities.
Manufacturer documentation
Official product / platform page
Simplex Related Documentation (includes 4100U references)
No public manufacturer manual verified for the 4100U in this Phase 1 pass.
FireAlarmGuy links manufacturer-hosted material only when it can be verified on the manufacturer’s own site.
Field notes
- Verify CPU/display generation before using programming steps.
- Record card addresses and node context before hardware replacement.
- Treat legacy platform availability separately from individual service parts.
Use the exact generation. Similar model names can have different hardware, firmware, menus, programming tools, device support, and service procedures.
Ask Fire Alarm Guy AI with the panel already identified
The button carries Simplex / Johnson Controls 4100U into the AI question so a short field question like “what does audio riser trouble mean?” keeps the exact panel context.