Honeywell S7800A Product Data
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.
7800 SERIES
PRODUCT DATA
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.
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 3
Wiring ............................................................................... 4
Troubleshooting ................................................................ 11
65-0090-4
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
— Diagnostic information:
• Device type.
•Flame amplifier type.
• Flame failure response time (FFRT).
•Manufacturing code.
•On-Off status of all digital inputs and
outputs.
•PREPURGE time selected.
•Software revision and version of 7800
SE RI ES
Relay Module and KDM.
•Status of configuration jumpers.
•Status of Run/Test Switch.
SPECIFICATIONS
Electrical Ratings:
Voltage and Frequency: 13 Vdc peak full wave rectified
(+20/-15%).
Power Dissipation: 7W maximum.
VA Consumption: 2 VA maximum.
Terminal Ratings:
Power: 13 Vdc peak full wave rectified.
Earth Ground.
Environmental Ratings:
Ambient Temperature Ranges:
Operating: -40°F (-40°C) to +140°F (+60°C).
Storage: -60°F (-51°C) to +150°F (+66°C).
Humidity: 85 percent relative humidity continuous,
noncondensing.
S7800A1050 Italian language display.
S7800A1068 Spanish language display.
S7800A1118 Japanese (Katakana) language display.
S7800A1126 Portuguese language display.
BURNER CONTROL
2-3/4
(69)
15/
32
(12)
1-15/16
(49)
29/32
(23)
SCROLL MODE
19/32
(15)
5/32 (4)
4-27/32 (123)
1-1/4
(32)
7/16 (11)
2-7/16 (62)
3-7/8 (99)
SAVE
4-3/32 (104)
1-1/32
(26)
13/
32
(11)
5/32
(4)
1/2
(13)
5/16
(8)
2-1/32
(52)
5/15
(8)
M5002B
Fig. 1. Approximate dimensions of S7800 in in. (mm).
29/32
(23)
NOTE: UL Class 4 rating when P/N 204718A,C NEMA 4
Cover is used.
Approvals:
Underwriters Laboratories Inc. Listed:
File No. MP268, Guide No. MCCZ.
Vibration: 0.5G environment.
Canadian Standards Association Certified:
No. LR9S329-3.
Mechanical:
Dimensions: See Fig. 1.
Weight: 4 ounces (124 grams), unpacked.
Factory Mutual Approved: Report No. J.I.1V9A0.AF.
IRI: Acceptable.
Federal Communications Commission: Part 15,
Class B emissions.
Display: 40 character (2 rows by 20 columns).
EN60730: For compliance with remote KDM mounting
requirements, provide electrical insulation separation by
Languages:
S7800A1001 English language display.
S7800A1035 French language display.
insulation using double or reinforced insulation. Do this by:
Optically isolating the communication or remote reset lines
from the control cabinet, or provide physical separation
S7800A1043 German language display.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
65-0090—4 2
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
from the communication or remote display cover assembly
(part number 204718A) or other suitable enclosure that
meets the IP40 class of protection.
Accessories:
203541 ControlBus 5-wire Electrical Connector.
S7810A1009 Data ControlBus Module™.
203765 Remote Display Mounting Bracket.
221818A 60 in. (1.5m) Extension Cable Assembly.
221818C 120 in. (3m) Extension Cable Assembly.
204718A NEMA 4 Cover Assembly for S7800A KDM.
204718B NEMA 1 Cover Assembly for S7800A KDM.
204718C NEMA 4 Cover Assembly for S7800A KDM with
reset button.
205321B Remote Display Flush Mount Kit.
INSTALLATION
WARNING
Electrical Shock Hazard.
Can cause severe injury or death.
Disconnect the power supply before beginning
installation to prevent electrical shock and equipment
damage. More than one power supply disconnect can
be involved.
Humidity
Install the S7800A where the relative humidity never reaches
the saturation point. The S7800 is designed to operate in a
maximum 85% RH continuous, noncondensing, moisture
environment.
Vibration
Do not install the S7800A where it can be subjected to
vibration in excess of 0.5G continuous maximum vibration.
Weather
The S7800A is not designed to be weather tight. If installed
outdoors, the S7800A must be protected by an approved
weather-tight enclosure such as the 204718A or 204718C
NEMA 4 Enclosure listed in Accessories.
Mounting KDM on 7800 SERIES Relay Module.
1. Align the two interlocking ears of the KDM with the two
mating slots on the 7800 SERIES Relay Module. See
Fig. 2.
When Installing This Product…
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and marked
on the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced, flame
safeguard service technician.
4. After installation is complete, check out the product
operation as provided in these instructions.
5. Be sure wiring complies with all applicable codes,
ordinances and regulations.
6. See Fig. 5, 6 and 7 for S7800A unique wiring
connections.
IMPORTANT
1.This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used
in accordance with the instructions, can cause
interference to radio communications. It has been
tested and found to comply with the limits for a Class
B computing device of Part 15 of FCC rules which
are designed to provided reasonable protection
against such interference when operated in a
commercial environment. Operation of this
equipment in a residential area can cause
interference, in which case, users, at their own
expense, can be required to take whatever
measures are required to correct this interference.
2.This digital apparatus does not exceed the Class B
limits for radio noise for digital apparatus set out in
the Radio Interference Regulations of the Canadian
Department of Communications.
Fig. 2. Keyboard display module mounting.
2. Insert the two interlocking ears into the two mating slots
and, with a hinge action, push on the lower corners of
the KDM to secure it to the 7800 SERIES Relay
Module.
3. Make sure the KDM is firmly in place.
Remote Mounting KDM
The KDM can be mounted either on the face of a panel door
or on other remote locations. See Fig. 3. When mounting the
KDM on the face of a door panel, closely follow these
instructions:
3 65-0090—4
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
Door Panel Mounting
Fig. 3. Panel mounting of a keyboard display module.
1. Select the location on the door panel for flush mounting.
2. Pay attention to the insertion dimensions of the two
KDM screws, two interlocking ears, and the two plug-in
connections to allow for sufficient clearance.
3. Use the KDM or Data ControlBus Module™ as a
template (Fig. 16) and mark the two screw locations,
interlocking ear locations and the two plug-in connector
locations.
4. Drill the pilot holes for the mounting screws.
5. Cut holes in the door panel for the interlocking ears and
the two plug-in connectors.
6. Mount the KDM, securing it with the two screws
provided in the KDM bag assembly.
Remote Display Mounting Bracket
Use the 203765 Remote Display Mounting Bracket when
mounting the KDM on a wall or remote location:
1. Use the 203765 Remote Display Mounting Bracket as a
template to mark the four screw locations.
2. Drill the pilot holes for the four mounting screws.
3. Mount the 203765 Remote Display Mounting Bracket by
securing the four no. 6 screws (M3.5 x 0.6). See Fig. 4.
4. Mount the KDM by aligning the two interlocking ears
with the two mating slots on the remote mounting
bracket.
5. Insert the two interlocking ears into the two mating slots.
6. Push on the lower corners of the KDM to secure it to the
remote mounting bracket.
7. Make sure the KDM is firmly in place.
Fig. 4. Remote mounting of a keyboard display module
using a 203765 Remote Display Mounting Bracket.
WIRING
WARNING
Electrical Shock Hazard.
Can cause severe injury or death.
To prevent electrical shock and equipment damage,
disconnect the power supply from the main disconnect
before beginning installation. More than one
disconnect can be involved.
1. Refer to Fig. 5, 6, and 7 for proper wiring.
2. Make sure all wiring complies with all applicable
electrical codes, ordinances and regulations.
3. For recommended wire size and type, see Table 1.
4. For Recommended grounding practices, see Table 2.
5. For KDM: The KDM is powered from a low voltage,
energy-limited source. It can be mounted outside of a
control panel if it is protected from mechanical damage.
NOTE: A 13 Vdc power supply must be used any time more
than one KDM is used. A maximum of two KDM,
Data ControlBus Modules™ or S7810B Multi-Drop
Switch Modules are allowed in any combination.
65-0090—4 4
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
N
Table 1. Recommended Wire Size and Part Number.
Application Recommended Wire Size Recommended Part Number
Keyboard Display Module 22 AWG two-wire twisted pair with
ground, or five-wire.
Data ControlBus™ Module 22 AWG two-wire twisted pair with
ground, or five-wire.
Remote Reset Module 22 AWG two-wire twisted pair, insulated
for low voltage.
Communications Interface ControlBus
Module™
13 Vdc full wave rectified transformer
power input.
22 AWG two-wire twisted pair with
ground.
18 AWG wire, insulated for voltages and
temperatures for given applications.
Table 2. Recommended Grounding Practices.
Ground Type Recommended Practice
Signal ground (KDM, Data ControlBus™
Module, Communications Interface
Use the shield of the signal wire to ground the device to the signal ground terminals
[3(c)] of each device. Connect the shield at both ends of the daisy chain to ground.
ControlBus Module™).
6. Recommended wire routing:
a. ControlBus:
(1) Do not route the ControlBus cable in conduits
S7800 KEYBOARD DISPLAY MODULE
(MOUNTED ON 7800 SERIES RELAY MODULE)
that carry line voltage circuits.
(2) Avoid routing the ControlBus cable close to
ignition transformer leadwires.
(3) Route the ControlBus cable outside of conduit if
properly supported and protected from damage.
3
A
1
b. Remote Reset:
(1) Do not run high voltage ignition transformer
wires in the same conduit with the Remote Reset
120 OHM
RESISTOR
wiring.
(2) Do not route Remote Reset wires in conduit with
line voltage circuits.
7. Maximum wire lengths:
120 OHM
RESISTOR
a. KDM: The maximum length interconnecting wire is
4000 ft (1219m).
b. Remote Reset leadwires: The maximum length wire
is 1000 ft (300m) to a Remote Reset push-button.
8. Install all electrical connectors.
9. Restore power to the panel.
1
A
Belden 8723 shielded cable or equivalent.
Belden 8723 shielded cable or equivalent.
—
Belden 8723 shielded cable or equivalent.
TTW60C, THW75C, THHN90C
MOMENTARY
PUSH BUTTO
B
C (GND)
23
1
1
23
B
C
RESET
+13 VDC
4
5
2
QS7800 COMMUNICATIONS
INTERFACE CONTROLBUS
MODULE, MOUNTED IN
Q7700 COMMUNICATIONS
INTERFACE MODULE
SWITCH
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120
1
OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTIONS OVER 100 FEET (30 METERS). CABLE SHIELD
MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS.
IF SHIELDED CABLE IS NOT USED, TWISTED PAIR
WIRE MUST BE USED.
2
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE, DATA
CONTROLBUS MODULE“, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).
TERMINALS OF 203541 5-WIRE CONNECTOR.
3
M1990F
Fig. 5. Wiring the keyboard display module.
5 65-0090—4
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
,
N
S
M
P
M
sequence status information. It also replaces a selectable
S7800 KEYBOARD DISPLAY MODULE
(MOUNTED ON 7800 SERIES RELAY MODULE)
message after 60 seconds if it or a lockout message is
available. The 7800 SERIES Relay Module LED provide
positive visual indication of the Relay Module sequence. The
5
A
B
C (GND)
23 54
1
120 OHM
RESISTOR
120 OHM
RESISTOR
1
A
5
S7800 REMOTE KEYBOARD DISPLAY MODULE
1
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO
120 OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTING OVER 100 FEET [30 METERS]. CABLE SHIELD
MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS.
IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE
MUST BE USED.
2
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE“, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).
3
7800 SERIES RELAY MODULE CAN SUPPORT ONE S7800
KEYBOARD DISPLAY MODULE. A 13 Vdc POWER SUPPLY
IS REQUIRED FOR EACH ADDITIONAL DISPLAY.
4
UP TO 36 S7800 KEYBOARD DISPLAYS CAN BE CONNECTED
TO A SINGLE 7800 RELAY MODULE NOT TO EXCEED
4000 FEET (1219M) TOTAL LEADWIRE RUN. DAISY CHAIN 1 TO 1
2 TO 2, 3 TO 3 AND PROVIDE 13 Vdc POWER SUPPLY FOR
EACH S7800 DISPLAY.
5
TERMINALS OF 203541 5-WIRE CONNECTOR.
1
1
23 54
B
C (GND)
+13 VDC
2
+13 VDC
RESET
RESET
Fig. 6. Wiring for multiple keyboard display modules.
MOMENTARY
PUSHBUTTON
SWITCH
3
4
2
L1
(HOT)
L2
13 Vdc
POWER
SUPPLY
M5006G
LED is energized simultaneously with the correct sequence
description.
S7810 DATA CONTROLBUS MODULE™
(MOUNTED ON 7800 SERIES RELAY MODULE)
MOMENTARY
PUSH BUTTO
A
1
120 OHM
RESISTOR
120 OHM
RESISTOR
1
A
7800 REMOTE KEYBOARD DISPLAY MODULE
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120
1
OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTIONS OVER 100 FEET. CABLE SHIELD MUST BE
TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED
CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.
2
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).
3
221818A OR C EXTENSION CAN BE USED IN PLACE OF THE
S7810 DATA CONTROLBUS MODULE™ IF DISPLAY IS TO
A CABINET DOOR.
B
C (GND)
23
1
1
23
B
C (GND)
+13 VDC
4
4
+13 VDC
RESET
5
5
RESET
SWITCH
3
2
M5285C
Fig. 7. Wiring keyboard display module
for remote mounting.
KDM Display
The first line of the KDM display provides current status of the
burner sequence (STANDBY, PURGE, PILOT IGN, MAIN
IGN, RUN and POSTPURGE), timing information (PURGE,
PILOT IGN, MAIN IGN and POSTPURGE) in minutes and
seconds, hold information (PURGE HOLD), and lockout
DI = DIAGNOSTICS
H1 = HISTORY
EA = EXPANDED ANNUNCIATOR
information (Lockout, Fault Code, Message and Sequence),
see Fig. 8. The extreme right side of the first line will be either
blank or will show a small arrow pointing to the second line
followed by a two-letter code (DI—Diagnostic Information,
Hn—Fault History Information (where n equals the number of
the fault), and EA—Expanded Annunciator). When the arrow
and two-letter code are displayed, it indicates the second line
is showing a selectable message submenu. The second line
SEQUENCE
STATUS
ELECTABLE
ESSAGE OR
REEMPTIVE
ESSAGE
will display selectable or preemptive messages. A selectable
message supplies information for flame strength, system
status indication, system or self-diagnostics and
troubleshooting. A preemptive message has parentheses
around the message and supplies a detailed message to
support the sequence status information. A preemptive
message can also be a lockout message. A preemptive
message replaces a selectable message to support the
Fig. 8. S7800 Keyboard Display Module.
FIVE WIRE CONNECTOR FOR
COMMUNICATIONS, REMOTE KEYBOARD
DISPLAY AND REMOTE RESET
M7412
65-0090—4 6
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
Keyboard Functions
The keyboard contains four push-buttons with separate
functions (SCROLL-down, SCROLL-up, MODE, and
CHANGE-LEVEL). The MODE and CHANGE-LEVEL, when
pressed together, provide a SAVE function.
1. SCROLL down-up push-buttons (↕). See Fig. 9. The
SCROLL down-up push-buttons (↕) are used to scroll
through the selectable messages. The double-headed
arrow (↕), which is located in the lower left position of
the second line of the display, represents the SCROLL
down-up push-buttons. The SCROLL down-up pushbuttons (↕) can be pressed to display the selectable
messages one at a time or held down to scroll through
the selectable messages at the rate of two per second.
BURNER CONTROL
RUN
Total Cycles 333
When the last item of the selectable message is viewed,
the display wraps around and displays the first
selectable message again.
2. CHANGE-LEVEL push-button (
↔), see Fig. 10. The
CHANGE-LEVEL push-button is used to change
between the first hierarchy of selectable messages to a
subset of selectable messages. The CHANGE-LEVEL
push-button can also be used to change from a subset
message to a first level selectable message. The
symbol (<), located on the second line in the lower right
corner of the display, represents a subset of selectable
messages.
3. MODE push-button, see Fig. 11. Use the MODE
push-button to instantaneously switch the display from a
second-line selectable message to a second-line
preempted message. The sixty second time-out
function can also be used for this task. The MODE
push-button only works if there is a second-line
preempted message or a lockout message.
BURNER CONTROL
RUN
Total Hours 1332
SCROLL
MODE
BURNER CONTROL
PILOT IGN 00:05
Fault History
SCROLL
MODE
Fig. 10. CHANGE-LEVEL (
SAVE
Fig. 9. SCROLL (↕
SAVE
SCROLL
) push-button function.
PILOT IGN 00:10 H1
Fault Cycle 174
SCROLL
↔) push-button function.
MODE
SAVE
M1932A
BURNER CONTROL
MODE
SAVE
M1933A
7 65-0090—4
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
A
BURNER CONTROL
LOCKOUT 17 DI
Main Valve T9 = O
SCROLL
MODE
SAVE
Fig. 11. MODE push-button function.
4. SAVE function, see Fig. 12. The SAVE function enables
users to identify the selectable message they want to
view upon power restoration. The second line
selectable message are restored to the most recently
saved selection when power returns. The SAVE
function is performed is by pressing and holding the
MODE key and then pressing the CHANGE-LEVEL key
(´). The second line of the display briefly notes
“…SAVING…” to confirm the keys were pressed.
Selectable Messages
For the second line display, two-level hierarchy, see Table 3.
The display values are as follows:
BURNER CONTROL
LOCKOUT 17
*Main Flame Fail*
SCROLL
MODE
BURNER CONTROL
PURGE 00:30
... SAVING ...
SCROLL
SAVE
M1934C
MODE
SAVE
n represents a numbered value.
T represents the terminal number.
x represents the suffix letter of the Relay Module.
M1935
Fig. 12. SAVE function.
Table 3. Selectable Messages.
65-0090—4 8
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