Honeywell – S7800A1142 – 7800 Series Keyboard Display Module (Valve Proving)

The Honeywell S7800A1142 is a 2-row, 20-character vacuum fluorescent display module designed for 7800 Series burner control systems. It’s essential for configuring valve-proving functions and offers advanced diagnostics, first-out annunciation, and fault code handling—ideal for OEMs, service technicians, and control panel integrators.

Key Features:

• Manufacturer: Honeywell

• Model / P/N: S7800A1142 (exact match)  

• Display: 2-line × 20-character VFD with 24 LEDs for expanded annunciation  

• Functionality:

  • Programs valve-proving and post-purge on compatible 7800 devices  

  • Shows burner sequence timing, hold, and lockout details

  • Remote reset capability and passcode protection

• Diagnostics: First-out fault info, custom “Call Service” messaging, and Modbus setup (via S7810 module)  

• Connectivity: Installs directly onto 7800 Series relay modules or remotely via 203541 connector  

• Power Supply: +13 V DC (provided from host control module)  

• Certifications: UL, CSA, FM listed