PRODUCT DATA
65-0090-4
® U.S. Registered Trademark
Copyright © 2002 Honeywell •  All Rights Reserved 
7800 SERIES
S7800A Keyboard Display Module
APPLICATION
The S7800A Keyboard Display Module (KDM) provides 
first-out annunciation and system diagnosis using a two-row 
by twenty-column readout. The KDM provides local or remote 
annunciation of operation and fault information, remote reset, 
report generation, burner control data and diagnostic 
information. The KDM is part of the 7800 SERIES of 
microprocessor-based burner controls for gas, oil, coal or 
combination fuel single burner applications.
The 7800 SERIES is programmed to provide a level of safety, 
functional capabilities and features beyond the capacity of 
conventional controls.
FEATURES
• Application flexibility.
• Communication interface capability.
• Dependable, long-term operation provided by 
microcomputer technology.
• First-out annunciation and system diagnostics 
provided by a 2-row by 20-column display.
• First-out expanded annunciation with 24 limit and 
interlock Light Emitting Diodes (LED).
• Local or remote annunciation of operation and 
fault information. 
• UL Class 4 rating when P/N 204718A,C NEMA 4 cover 
is used.
•
Remote reset.
• Report generation.
• Burner controller data:
— Sequence status.
— Sequence time.
— Hold status.
— Lockout/alarm status.
— Flame signal strength.
— Expanded annunciator status.
— Total cycles of operation.
— Total hours of operation.
— Fault history of six most recent faults:
         • Cycles of operation at time of fault.
         • Expanded annunciator data at time of fault.
         • Fault message and code.
         • Hours of operation at time of fault.
         • Sequence status at time of fault.
         • Sequence time at time of fault.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information  ........................................................ 2
Installation ........................................................................ 3
Wiring ............................................................................... 4
Troubleshooting ................................................................ 11
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