SXBC-5 LonTalk® Integration Node
INSTALLATION INSTRUCTIONS
SXBC Series
LonTalk® Integration Node
M29424
APPLICATION
The SXBC-5 LonTalk Integration Node allows for the integration of Honeywell SXB35 series Power Meters to a LonWorks®
control/monitoring system. The LonTalk Integration Node converts the 2 power metering values expressed by the SXB35 as
Modbus protocol to LonTalk. Lon® Node can report the data from up to 63 SXB35 power meters which reside on the downstream
modbus network. By adjusting an input variable, the Modbus address of the desired meter may be selected. The data can then be
recorded before selecting another power meter. The Lon Node can also be dedicated to one SXB35 for binding purposes.
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•
•
•
•
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Submetering for commercial tenants...allocate costs
Energy management and performance contracting
Load shedding and demand control
Easy Integration to Lon Networks
The SXBC-5 is pre-configured to accommodate both data points provided by up to 63 SXB35 Honeywell Meters
Easy cost-effective connectivity to LonWorks systems...makes open connectivity possible
SPECIFICATIONS
Network Variable Type
Float
LonWorks Network
Free topology transceiver, 78 kbps
Power
12-24 VAC/DC<100mA isolated source
Modbus Network
RTU 9600 BAUD, 8N1 format
Temperature Range
0 to +60 ºC (+32 to +140ºF)
Meter Data Network Variables
kWh, Consumption
kW, Real Power
Humidity Range
0 - 95% non-condensing
Z205590-0A
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SXBC-5 LONTALK® INTEGRATION NODE
WARNING
This product is not intended for life or safety applications.
This product is not intended for installation in hazardous or classified locations.
CAUTION
Potential electrocution hazard exists. This is a Class 2 low voltage device. Install only in Class 2 environments.
Read instructions thoroughly prior to installation
CAUTION
This product is not intended for life or safety applications.
Do not install this product in hazardous or classified locations.
The installer is responsible for conformance to all applicable codes.
INSTALLATION
4.25
(108)
C
L
1.16
(30)
1.53
(39)
LONTALK ®
CONTROLLER
C
L
4.25
(108)
C
L
1.16
(30)
LONTALK
NETWORK
2.12
(54)
MODBUS
OP
SERVICE
TX
RX
M28753
Fig. 1. SXBC-5 Dimensional diagram.
SXBC-5 LON NODE
MODBUS
NETWORK
SXB35
SXB35
M28760
Fig. 2. LonTalk network overview.
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2
LON
SXBC-5 LONTALK® INTEGRATION NODE
TB4
TB6
TX
TB5
5
6
B A
TB7
TB8
OP
SERVICE
4
TB3
RX
3
TB2
MB SHIELD
+ -
2
TB1
POWER
1
7
8
9
M28755
Fig. 3. Component locations for SXBC-5
1. LonTalk Terminal Block
Make connections to the LON Network at these terminals.
Polarity is not important.
2. Shield Terminal Block
Share this terminal block to provide communications shielding
for both the LonTalk and Modbus communications networks.
3. Modbus Terminal Block
Make connections to the Enercept Modbus network here.
Ensure correct polarity.
LED status after the service switch is pushed:
• ON, then OFF solid = Device has been commissioned by a
network tool.
• BLINK AT 1/2 Hz. rate = Device has not been
commissioned by a network tool.
• ON, OFF, then solid ON = Device does not have an
application.
8. Identification Service Switch
Standard LonWorks® Service Switch. Used in concert with the
Service LED to locally view the commissioning status of the
device.
4. 12-24 VAC/VDC Power
Two wire system power terminal block.
9. OP LED
Normally on. The OP LED will blink off whenever there is an
incomplete data exchange between the meter and the Lon
Node. An always off indication means that the meter is not
responding to data requests. This will occur if the meter is
disconnected unpowered or is incorrectly wired. See
“Operation” on page 4 for further details.
5. TX LED
Indicates transmission of Modbus network data
6. RX LED
Indicates reception of Modbus network data
7. Service LED
Standard LON Works Service LED. Used in concert with the
Service Switch to locally view the commissioning status of the
device.
3
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SXBC-5 LONTALK® INTEGRATION NODE
INSTALLATION
See Fig. 5.
A
LON
B
SHIELD
TB1
TB2
TB3
TB4
MB
+
POWER
TB5
TB6
TB7
TB8
M28756
Fig. 4. SXBC-5 wiring block.
1.
2.
3.
4.
5.
6.
7.
8.
Remove screws from the lid of the SXBC-5 housing. Lift lid and remove wire guide caps. Set to the side with the lid.
Bring the SXB35 RS-485 network cable to the Modbus terminal block marked -MB+. Be sure to thread wires through wire
guide before terminating. Connect the (+) to TB6. Connect the (-) wire to TB5. Connect the shield wire to TB4.
Bring the LON Works network cable to the terminal block marked BA LON. Be sure to thread wires through wire guide
before terminating. Connect the A wire to TB1. Connect the B wire to TB2. Connect the LON network shield wire to TB3.
Connect the 12-24VAC/DC power wires to TB7 and TB8. The power terminals are not polarity sensitive. This power source
must be separate and isolated from other circuits to prevent unwanted “ground loops.”
Thread wires through the most convenient openings in the housing.
Re-attach the lid and snap wire guides into place. Replace screws to hold the housing together.
Mount the SXBC-5. The device can be flush mounted to a wall, screw mounted to a 2 or 4s electrical enclosure, or nipple
mounted to an existing enclosure. The SXBC-5 must be mounted in a class 2 environment.
Refer to the SXB35 installation instructions for connection of the Lon Node to the SXB35 power meter.
OPERATION AND CONFIGURATION
Operation
The SXBC-5 continuously polls the chosen meter for its full data set approximately once per second. All output network variables
are immediately updated with this received data. All data exchanged between the node and the meter are fully checksummed to
ensure data integrity. If corrupt data is detected, the output network variables are not updated and retain their previous value.
1.
2.
3.
4.
Upon power-up, the OP-LED will be lit.
During operation, the OP-LED will be turned off if any of the following occurs:
a. No Modbus requests are generated by the unit for 10 seconds. This occurs with new units (which have yet to be commissioned), or any units which are in “Unconfigured,” “Off-Line,” or “Disabled” LonTalk states. Under these conditions,
the Neuron chip will not generate any requests to the Modbus network.
b. No response or an error response from the Modbus network (e.g. no meter attached, wrong type of meter--using
SXB36 instead of SXB35, broken RS485 wires, etc.)
If the OP-LED is turned OFF for any reason covered in number 2 above, it will be re-lit when a correct response is received
from the Modbus network.
Under Condition 2b above, the floating-point SNVT data will be replaced with floating-point-Not-a-Number
(NaN,0x7FC00000), indicating to the remote user that the data is no longer valid.
Index Feature
By adjusting the network input variable nviMeter Index, the Modbus address used to populate all of the NVOs can be changed.
This option is used to view and archive data from a Modbus network of up to 63 SXB35 power meters. Using this feature
eliminates the possibility of binding any points from the node. If the application requires binding, the Lon Node can only view one
meter.
Using the Meter-Index function
To ensure that the data read from the unit corresponds to the correct meter, follow this algorithm:
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4
SXBC-5 LONTALK® INTEGRATION NODE
1.
2.
3.
Change nviMeter Index to the desired meter.
Wait for nvoMeter Index to change to the same value as nviMeter Index. Do not read data from the unit until this occurs:
You will not be able to determine which meter the data corresponds to until nvoMeter Index=nviMeter Index. Do not use
“time-delays” to wait for the new data to be valid.
Once nvoMeter index=nviMeter Index, you may poll values with the assurance that the data corresponds to the desired
meter.
Power Meter Configuration
Modbus address 1 must be used for the SXB35 power meter if binding is required. When employing the indexing method
addresses 1-63 can be used. Please refer to the SXB35 Installation Instructions for meter addressing information.
Auto Propagate Feature
The SXBC-5 can automatically propagate all network variables. If nciMaxSendTg is set above zero (default is zero), all variables
will be propagated periodically. Units are in tenths of a second. For example, if nciMaxSendTg is set to 100 the SXBC-5 will
automatically propagate all variables every 10 seconds.
Resetting the Energy Accumulator
The Energy Accumulator nvoEgyWH may be reset to zero by using the input network variable nviEgyClr using the following
procedure:
1. Ensure that nviEgyClr.state > 0 & nviEgyClr.value > 0. Default is {1,1}.
2. Set nviEgyClr.state =0 & nviEgyClr.value=0.
3. Set nviEgyClr.state =1 & nviEgyClr.value=1.
Once cleared, the meter will continue to count kWH from zero until another reset is commanded.
Node Identification
Wink: The Lon Node will light its service LED for 5 seconds in response to a WINK command.
Service Pin: A service pushbutton is provided for this method of identification. (See Fig. 3).
Neuron ID: The Neuron ID is located on a label on the back of the device. It can be written down or peeled off as a removable
sticker with bar code for easy insertion to your network.
Program ID
The standard program ID for this product is 90:00:14:8A:0D:02:04:02.
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SXBC-5 LONTALK® INTEGRATION NODE
NETWORK OPTIONS
Indexing Option: Allows the node to access up to 63 SXB35’s for viewing and archiving purposes only.
LONTALK ®
CONTROLLER
LONTALK
NETWORK
SXBC-5 LON NODE
MODBUS
NETWORK
UP TO 63 SXB35’S
M28761
Fig. 5. Diagram of Modbus network utilizing the indexing option.
Bound Option: For all applications requiring binding
NOTE: If the bound option is employed each SXB35 must be addressed at 1.
LONTALK ®
CONTROLLER
LONTALK
NETWORK
SXBC-5 LON NODE
SXB35
MODBUS
NETWORK
SXB35
M28762
Fig. 6. Diagram of Modbus network configured with bound option.
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SXBC-5 LONTALK® INTEGRATION NODE
SXBC-5
MANDATORY
NETWORK
nv2
nvoPower_f
SNVT_power_f
nv1
nvoEgyWH
SNVT_elec_whr_f
nv3
nviEgyClr
SNVT_switch
nv4
nviMeterIndex
SNVT_count
nv5
nvoMeterIndex
SNVT_count
VARIABLE
MANUFACTURERSPECIFIC
NETWORK
VARIABLES
CONFIGURATION PROPERTIES
nc49
nc52
nc88
nc49
nciMaxSendT
nciMinSendT
nciMinDelta
nciMaxSendTg
SNVT_time_sec
SNVT_time_sec
SNVT_lev_cont
SNVT_ time_sec
M28763
Fig. 7. SXBC-5 Network variables.
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SXBC-5 LONTALK® INTEGRATION NODE
Table 1. Network Variable Details
Name
Type
Range
Description
nv1
nvoEgyWH
0-1e38kWH
kWH Consumption
nv2
nvoPower_f
0-1e38W
kW Real Power
nv3
nviEgyClr
See text
Used to reset nvoEgykWH to zero
nv4
nviMeterIndex
1-63
Used to select modbus address
nv5
nvoMeterIndex
1-63
Reports selected modbus address
nc49
nciMaxSendT
0.0-6553.4s
Maximum time between nvoPower updates.
Default is 0 (disabled).
nc52
nciMinSendT
0.0-6553.4s
Minimum time between nvoPower updates.
Default is 15 secs.
nc88
nciMinDelta
0.0-100%
Percent change in nvoPower which will force an nvoPower update.
Default is 5%. Set to 0.0% to disable.
nc49
nciMaxSendTg
0.0-6553.4s
Maximum time between updates to all network variables.
Default is 0 (disabled).
Automation and Control Solutions
Honeywell International Inc.
Honeywell Limited-Honeywell Limitée
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35 Dynamic Drive
Golden Valley, MN 55422
Toronto, Ontario M1V 4Z9
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® U.S. Registered Trademark
© 2009 Honeywell International Inc.
62-0314—01 M.S. 05-09