7800 SERIES
S7810B Multi-Drop Switch Module
PRODUCT DATA
APPLICATION
The Honeywell 7800 SERIES is a microprocessor-based integrated burner control for automatically fired gas, oil or combination fuel single-burner applications. The 7800 SERIES is programmed to provide a level of safety, functional capability and features beyond the capacity of conventional controls. Functions provided by the 7800 SERIES include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting.
The S7810B Multi-Drop Switch Module supports remote mounting of a Keyboard Display Module, personal computer communications interface for multi-dropped 7800 SERIES subnetworks, and remote reset of a 7800 SERIES
Relay Module.
FEATURES
• Multi-dropped communications bus interface.
• Remote reset.
• Ability to remotely mount a Keyboard Display Module.
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Contents |
Application ........................................................................ |
1 |
Features ........................................................................... |
1 |
Specifications ................................................................... |
2 |
Ordering Information ......................................................... |
2 |
Installation ........................................................................ |
2 |
Building a Multi-Drop Network .......................................... |
3 |
Operation .......................................................................... |
4 |
65-0228—3
7800 SERIES S7810B MULTI-DROP SWITCH MODULE
SPECIFICATIONS
Model: S7810B Multi-Drop Switch Module.
Electrical Ratings:
Voltage and Frequency:
13 Vdc peak full-wave rectified (+20/-15%).
Power Dissipation:
2W maximum.
Terminal Ratings:
Power: 13 Vdc peak full-wave rectified.
Earth ground.
Local ControlBus (1,2,3) and Multi-Drop ControlBus
(6,7,8): 5 Vdc at 1 mA maximum.
Electrical Connector (included): ControlBus: 208727 8-pin
electrical connector.
Environmental Ratings:
Ambient Temperature:
Operating: -40°F to +140°F (-40°C to +60°C).
Storage: -40°F to +150°F (-40°C to 66°C).
Humidity:
85% relative humidity continuous, noncondensing.
Vibration:
0.5G environment.
Dimensions: See Fig. 1.
1-1/8 (29)
7/16 (11)
MODE 
BURNER CONTROL
2-3/4
(69)
5/32
(4)
4-27/32 (123) |
29/32 (23) |
M11349B
Fig. 1. Mounting dimensions of S7810B
Multi-Drop Switch Module in in. (mm).
Weight: 4 ounces.
Replacement Part: 208727 eight-pin electrical connector.
INSTALLATION
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.The installer must be a trained, experienced flame safeguard technician.
4.Disconnect the power supply before beginning installation to prevent electrical shock and equipment damage. More than one power supply disconnect can be required.
5.Wiring must comply with all applicable codes, ordinances and regulations.
6.After installation is complete, check out product operation as provided in these instructions.
IMPORTANT:
This equipment can cause interference with radio communications.
This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the Instructions Manual, may cause interference with radio communication. It has been tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case, users at their own expense will be required to take whatever measures may be required to correct the interference. Any unauthorized modification of this equipment may result in the revocation of the owner’s authority to continue its operation. When operating the S7810B remotely with a separate power supply, FCC compliance is not guaranteed unless an FCC-approved power supply is used.
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 Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2.Honeywell Customer Care 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.
65-0228—3 |
2 |
Canadian EMI: This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la Classe A prescrites dans le Règlement sur le brouillage radioeléctrique édicté par le ministère des Communications du Canada.
Humidity
Install the S7810B where the relative humidity never reaches the saturation point. The S7810B is designed to operate in a maximum humidity environment of 85 percent relative humidity continuous, noncondensing moisture.
Weather
The S7810B is not designed to be weather-tight. When installed outdoors, protect the S7810B with an approved weather-tight enclosure.
Vibration
Do not install the S7810B where it could be subjected to vibration in excess of 0.5G continuous maximum vibration.
Mounting the S7810B Multi-Drop Switch
Module.
1.Align the two ears of the Multi-Drop Switch Module with the two mating slots on the 7800 SERIES Relay Module.
2.Insert the two interlocking ears into the two mating slots and, with a hinge action, push on the lower corners of the Multi-Drop Switch Module to secure it to the 7800 SERIES Relay Module.
Wiring (Fig. 2)
1.Refer to Fig. 2 for proper wiring.
2.All wiring must comply with all applicable electrical codes, ordinances and regulations.
3.Recommended wiring size and type:
a.For ControlBus™ communications, use 22 AWG, 3-wire shielded cable (Belden part number 8723 or equivalent).
b.For 13 Vdc and remote reset switch operation, use 22 AWG wire insulated for voltages and temperatures in the application. Suggested wire types include TW (60°C), THW (75°C) and THHN (90°C) Terminal identification numbers and letters shown in Table 1.
7800 SERIES S7810B MULTI-DROP SWITCH MODULE
Table 1. S7810B and QS7800B Terminal Identification.
|
|
S7810B |
QS7800B |
|
Signal |
Terminal |
Terminal |
Local Bus Data + |
1 |
None |
|
Local Bus Data - |
2 |
None |
|
|
|
|
|
Common |
3 |
None |
|
• |
Local Bus Common |
|
|
• |
+13 Vdc Common |
|
|
• |
Remote Reset Common |
|
|
+13 Vdc |
4 |
None |
|
|
|
|
|
Remote Reset |
5 |
None |
|
|
|
|
|
Multi-Drop Bus Common |
6 |
c |
|
|
|
|
|
Multi-Drop Bus Data + |
7 |
a |
|
|
|
|
|
Multi-Drop Bus Data - |
8 |
b |
|
|
|
|
|
4.Wire routing:
a.Do not route the ControlBusª cable in conduit with line voltage circuits.
b.Do not route the ControlBusª cable close to the ignition transformers.
c.Route the ControlBusª cable outside of conduit if properly supported and protected from damage.
d.Route the ControlBusª cable so that all devices are connected in a daisy chain configuration. See Fig. 3.
5.Maximum wire lengths:
a.RS-485 Communications bus, 4000 feet (1219 meters).
b.Remote reset switch, 1000 feet (305 meters).
BUILDING A MULTI-DROP NETWORK
The subnetwork addressing in the Q7700 Network Interface Unit (NIU) is not contiguous. It is divided into two blocks, containing 198 and 24 addresses, respectively. A maximum multi-drop configuration would include 222 subnetworks (198 plus 24) on a single Q7700 NIU.
One QS7800B ControlBusª Module card supports up to 31 multi-drop subnetworks without using an RS-485 repeater. If an RS-485 repeater is used, up to 61 multi-drop subnetworks can be supported by one QS7800B card. The RS-485 repeater must be installed between the 30th and 31st subnetworks.
Each subnetwork includes one 7800 SERIES controller with or without an S7800 Keyboard Display Module and/or an S7830 Expanded Annunciator. An S7810B1007 Multi-Drop Switch Module is required in each subnetwork. See Fig. 3 for wiring information.
Subnetworks can be spread evenly (balanced) across the NIU slots to improve speed of communications.
It is recommended that the multi-drop network be built starting with slot number 1 of the NIU, subject to the above guidelines.
Record the serial number and physical location of each S7810B Multi-Drop Switch. This data will be useful when commissioning the ZM7850 Combustion System Manager (CSM) software. Refer to CSM manual, form 65-0102, for CSM commissioning.
3 |
65-0228—3 |
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