Laars ProtoNode FPC-N34 User guide

H2354400E
Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583
Headquarters: 20 Industrial Way, Rochester, NH USA 03867 • 603.335.6300 • Fax 603.335.3355
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com Litho in U.S.A. © Laars Heating Systems 1602 Document 4236E
Document Revision: 9.C
Auto Selector
Template Revision: 45
ProtoNode FPC-N34 and ProtoNode FPC-N35
Startup Guide
For Interfacing LAARS Products:
Sola
To Building Automation Systems:
BACnet MS/TP,BACnet/IP,Modbus TCP/IP, Metasys N2
and LonWorks
APPLICABILITY & EFFECTIVITY
Explains ProtoNode FPC-N34 and FPC-N35 hardware and how to install it.
The instructions are effective for the above as of July 2015
800.900.9276 •Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 •603.335.6300 •Fax 603.335.3355 (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 •905.238.0100 •Fax 905.366.0130
www.Laars.com
Document Revision: 9.C
Auto Selector
Template Revision: 45
ProtoNode FPC-N34 and ProtoNode FPC-N35
Startup Guide
For Interfacing LAARS Products:
Sola
To Building Automation Systems:
BACnet MS/TP,BACnet/IP,Modbus TCP/IP, Metasys N2
and LonWorks
APPLICABILITY & EFFECTIVITY
Explains ProtoNode FPC-N34 and FPC-N35 hardware and how to install it.
The instructions are effective for the above as of July 2015
Document 4236EThe LAARS Gateway Startup Guide

LAARS’ ProtoNode Startup Guide
Page 2 of 43
Technical Support:
Thank you for purchasing the ProtoNode for LAARS.
Please call LAARS Service for Technical support of the ProtoNode product.
FieldServer does not provide direct support. If LAARS needs to escalate the concern, they will contact
FieldServer for assistance.
Support Contact Information:
LAARS Service
20 Industrial Way,
Rochester, NH 03867
Phone: 800.900.9276
LAARS Service:
Phone: 603.335.6300
Fax: 800.559.1583
Email: info@LAARS.com
Website: www.laars.com
LAARS Heating Systems
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LAARS’ ProtoNode Startup Guide
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A Quick Start Guide
1. Record the information about the unit. (Section 2.1)
2. Set the device’s Modbus RTU serial settings (i.e. baud rate, parity, stop bits) and Modbus Node-ID
for each of the devices that will be connected to ProtoNode FPC-N34 or FPC-N35. (Section 2.2)
3. Select a stored configuration and set field protocol MAC address/Node-ID/Device Instance, and baud
rate. (Section 2.3)
4. Connect ProtoNode’s 6 pin RS-485 connector to the Modbus RS-485 network that is connected to
each of the devices. (Section 3.2)
5. Connect ProtoNode FPC-N34’s 3 pin RS-485 port to the Field Protocol cabling,
or connect ProtoNode FPC-N35’s 2 pin LonWorks port to the Field Protocol cabling. (Section 3.4)
6. Connect Power to ProtoNode’s 6 pin connector. (Section 3.5)
7. BACnet/IP or Modbus TCP/IP (FPC-N34): Use the ProtoNode’s embedded tool which is accessed
with a browser, referred to in this manual as the Web Configurator, to change the IP address. No
changes to the configuration file are necessary. (Section 4)
8. LonWorks (FPC-N35): The ProtoNode must be commissioned on the LonWorks Network. This
needs to be done by the LonWorks administrator using a LonWorks Commissioning tool. (Section 6)
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LAARS’ ProtoNode Startup Guide
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Certifications
BTL MARK –BACNET TESTING LABORATORY
LONMARK CERTIFICATION
The BTL Mark on ProtoNode RER is a symbol that indicates that a product has
passed a series of rigorous tests conducted by an independent laboratory
which verifies that the product correctly implements the BACnet features
claimed in the listing. The mark is a symbol of a high-quality BACnet product.
Go to http://www.BACnetInternational.net/btl/ for more information about the
BACnet Testing Laboratory. Click here for BACnet PIC Statement
.
LonMark International is the recognized authority for certification, education,
and promotion of interoperability standards for the benefit of manufacturers,
integrators and end users. LonMark International has developed extensive
product certification standards and tests to provide the integrator and user with
confidence that products from multiple manufacturers utilizing LonMark
devices work together. FieldServer Technologies has more LonMark Certified
gateways than any other gateway manufacturer, including the ProtoCessor,
ProtoCarrier and ProtoNode for OEM applications and the full featured,
configurable gateways.
LAARS Heating Systems
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LAARS’ ProtoNode Startup Guide
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TABLE OF CONTENTS
1Introduction................................................................................................................................................. 7
1.1 ProtoNode Gateway ...................................................................................................................................7
2BACnet/LonWorks Setup for ProtoCessor ProtoNode FPC-N34/FPC-N35...................................... 8
2.1 Record Identification Data .........................................................................................................................8
2.2 Configuring Device Communications .......................................................................................................8
2.2.1 Set Modbus COM setting on all of the devices connected to the ProtoNode ..............................8
2.2.2 Set Modbus RTU Node-ID for each of the devices attached to the ProtoNode ..........................8
2.3 BMS Network Settings: Selecting Stored Configurations, Setting the Mac Address, Device
Instance, and Baud Rate .......................................................................................................................................9
2.3.1 Selecting Configuration Files for Devices: “S” bank DIP Switches S0 –S3.................................9
2.3.1.1 BACnet MS/TP and BACnet IP DIP Switch Settings ..............................................................9
2.3.1.2 LonWorks DIP Switch Settings.................................................................................................10
2.3.2 BACnet MS/TP (FPC-N34): Setting the MAC Address for BMS Network ..................................11
2.3.3 BACnet MS/TP and BACnet/IP (FPC-N34): Setting the Device Instance ..................................12
2.3.3.1 BACnet MS/TP or BACnet/IP: Assigning Specific Device Instances ................................12
2.3.4 Metasys N2 or Modbus TCP/IP (FPC-N34): Setting the Node-ID ...............................................12
2.3.5 BACnet MS/TP (FPC-N34): Setting the Serial Baud Rate for BMS Network.............................13
2.3.5.1 Baud Rate DIP Switch Selection..............................................................................................13
3Interfacing ProtoNode to Devices......................................................................................................... 14
3.1 ProtoNode FPC-N34 and FPC-N35 Showing Connection Ports .......................................................14
3.2 Device Connections to ProtoNode .........................................................................................................15
3.2.1 Sola wiring to the ProtoNode using Display ....................................................................................16
3.2.2 Biasing the Modbus RS-485 Device Network.................................................................................17
3.2.3 End of Line Termination Switch for the Modbus RS-485 Device Network .................................18
3.3 BACnet MS/TP or Metasys N2 (FPC-N34): Wiring Field Port to BMS Network ..............................19
3.4 LonWorks (FPC-N35): Wiring Field Port to LonWorks Network ........................................................19
3.5 Power-Up ProtoNode ...............................................................................................................................20
4BACnet/IP and Modbus TCP/IP: Change the Protonode IP Address.............................................. 21
4.1 Connect the PC to ProtoNode via the Ethernet Port ...........................................................................21
4.2 BACnet/IP and Modbus TCP/IP: Setting IP Address for Field Network............................................22
5BACnet MS/TP and BACnet/IP: Setting Node_Offset to Assign Specific Device Instances ..... 24
6LonWorks (FPC-N35): Commissioning ProtoNode on a lonworks Network ................................. 25
6.1 Commissioning ProtoNode FPC-N35 on a LonWorks Network.........................................................25
6.1.1 Instructions to Download XIF File from ProtoNode FPC-N35 Using Browser ...........................25
7CAS BACnet Explorer for Validating ProtoNode in the Field........................................................... 27
7.1 Downloading the CAS Explorer and Requesting an Activation Key..................................................27
7.2 CAS BACnet Setup...................................................................................................................................28
7.2.1 CAS BACnet MS/TP Setup................................................................................................................28
7.2.2 CAS BACnet BACnet/IP Setup .........................................................................................................28
Appendix A. Troubleshooting ....................................................................................................................... 29
Appendix A.1. Viewing Diagnostic information.................................................................................................29
Appendix A.2. Check Wiring and Settings ........................................................................................................30
Appendix A.3. Take Diagnostic Capture With the FieldServer Utilities.........................................................30
Appendix A.4. BACnet: Setting Network_Number for more than one ProtoNode on Subnet ...................33
Appendix A.5. LED Diagnostics for Modbus RTU Communications Between ProtoNode and Devices .34
Appendix B. Additional Features.................................................................................................................. 35
Appendix B.1. DIP switch settings to support 1 through 8 Sola to Metasys N2 and Modbus TCP/IP .....35
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LAARS’ ProtoNode Startup Guide
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Appendix C. Vendor Information -Laars..................................................................................................... 36
Appendix C.1. Sola Modbus RTU Mappings to BACnet MS/TP, BACnet/IP, Metasys N2 and LonWorks
.................................................................................................................................................................................36
Appendix D. “A” Bank DIP Switch Settings................................................................................................ 39
Appendix D.1. “A” Bank DIP Switch Settings....................................................................................................39
Appendix E. Reference ................................................................................................................................... 42
Appendix E.1. Specifications...............................................................................................................................42
Appendix E.1.1. Compliance with UL Regulations ...................................................................................42
Appendix F. Limited 2 Year Warranty .......................................................................................................... 43
LIST OF FIGURES
Figure 1: ProtoCessor Part Numbers.......................................................................................................................8
Figure 2: Modbus RTU COM Settings .....................................................................................................................8
Figure 3: S Bank DIP Switches.................................................................................................................................9
Figure 4: MAC Address DIP Switches ...................................................................................................................11
Figure 5: Baud Rate DIP Switches.........................................................................................................................13
Figure 6: BMS Baud Rate........................................................................................................................................13
Figure 7: ProtoNode BACnet FPC-N34 (upper) and ProtoNode FPC-N35 (lower) ........................................14
Figure 8: Power and RS-485 Connections ...........................................................................................................15
Figure 9: Sola wiring using Display ........................................................................................................................16
Figure 10: Modbus RS-485 Biasing Switch on the ProtoNode N34 (left) and ProtoNode N35 (right) .........17
Figure 11: Modbus RS-485 End-Of-Line Termination Switch on the ProtoNode N34 (left) and...................18
Figure 12: Connection from ProtoNode to RS-485 Field Network ....................................................................19
Figure 13: RS-485 BMS Network EOL Switch .....................................................................................................19
Figure 14: LonWorks Terminal................................................................................................................................19
Figure 15: Required current draw for the ProtoNode ..........................................................................................20
Figure 16: Power Connections................................................................................................................................20
Figure 17: Web Configuration Screen ...................................................................................................................22
Figure 18: Changing IP Address via FST Web GUI ............................................................................................23
Figure 19: Web Configurator screen ......................................................................................................................24
Figure 20: LonWorks Service Pin Location...........................................................................................................25
Figure 21: Sample of Fserver.XIF File Being Generated....................................................................................26
Figure 22: Downloading the CAS Explorer ...........................................................................................................27
Figure 23: Requesting CAS Activation Key ..........................................................................................................27
Figure 24: Error messages screen .........................................................................................................................29
Figure 25: Ethernet Port Location...........................................................................................................................30
Figure 26: Web Configurator showing setting the network number for BACnet/IP.........................................33
Figure 27: Diagnostic LEDs.....................................................................................................................................34
Figure 28: Specifications .........................................................................................................................................42
LAARS Heating Systems
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LAARS’ ProtoNode Startup Guide
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1INTRODUCTION
1.1 ProtoNode Gateway
ProtoNode is an external, high performance Building Automation multi-protocol gateway that
has been preprogrammed for LAARS’ products (hereafter called “device”) to various building
automation protocols. These protocols include BACnet®1MS/TP, BACnet/IP, Metasys®2N2 by
JCI, Modbus TCP/IP, and LonWorks®3.Configurations for the various protocols are stored within
the ProtoNode and are selectable via DIP switches for fast and easy installation.
It is not necessary to download any configuration files to support the required applications. The
ProtoNode is pre-loaded with tested Profiles/Configurations for the supported devices.
1BACnet is a registered trademark of ASHRAE
2Metasys is a registered trademark of Johnson Controls Inc.
4LonWorks is a registered trademark of Echelon Corporation
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LAARS’ ProtoNode Startup Guide
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2 BACNET/LONWORKS SETUP FOR PROTOCESSOR PROTONODE FPC-
N34/FPC-N35
2.1 Record Identification Data
Each ProtoNode has a unique part number located on the side or the back of the unit. This number
should be recorded, as it may be required for technical support. The numbers are as follows:
Model Part Number
ProtoNode FPC-N34 FPC-N34-0701
ProtoNode FPC-N35 FPC-N35-0702
Figure 1: ProtoCessor Part Numbers
•FPC-N34 units have the following 3 ports: RS-485 + Ethernet + RS-485.
•FPC-N35 units have the following 3 ports: LonWorks + Ethernet + RS-485
2.2 Configuring Device Communications
2.2.1 Set Modbus COM setting on all of the devices connected to the ProtoNode
•All of the Serial devices connected to ProtoNode MUST have the same Baud Rate, Data Bits,
Stop Bits, and Parity settings.
•Figure 2specifies the device serial port settings required to communicate with the ProtoNode.
Serial Port Setting Device
Protocol Modbus RTU
Baud Rate
38400
Parity
None
Data Bits
8
Stop Bits
1
Figure 2: Modbus RTU COM Settings
2.2.2 Set Modbus RTU Node-ID for each of the devices attached to the ProtoNode
Set the Modbus Node-ID for each of the devices attached to ProtoNode.
•The Modbus Node-ID’s need to be uniquely assigned, starting with a value of 1 for the first
device.
•Modbus Node-ID values for additional devices must be sequential (2, 3, 4, …).
LAARS Heating Systems
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LAARS’ ProtoNode Startup Guide
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2.3 BMS Network Settings: Selecting Stored Configurations, Setting the Mac
Address, Device Instance,and Baud Rate
2.3.1 Selecting Configuration Files for Devices: “S” bank DIP Switches S0 –S3
•The S bank of DIP switches (S0 -S3) are used to select and load a configuration file from a group
of pretested/preloaded configuration files which are stored in the ProtoNode FPC-N34 (BACnet
MS/TP, BACnet/IP, Modbus TCP/IP, Metasys N2) and the ProtoNode FPC-N35 (LonWorks).
2.3.1.1 BACnet MS/TP and BACnet IP DIP Switch Settings
The following chartsdescribes S0 -S3 DIP Switch configuration settings for 1 through 8 device
applications to support BACnet MS/TP and BACnet/IP on a ProtoNode FPC-N34
ProtoCarrier DIP
Switches
Profile -FPC-N34-0701
S0
S1
S2
S3
BACnet/IP and BACnet MS/TP Sola 1 Deg_F
Off
Off
Off
Off
BACnet/IP and BACnet MS/TP Sola 2 Deg_F
On
Off
Off
Off
BACnet/IP and BACnet MS/TP Sola 3 Deg_F
Off
On
Off
Off
BACnet/IP and BACnet MS/TP Sola 4 Deg_F
On
On
Off
Off
BACnet/IP and BACnet MS/TP Sola 5 Deg_F
Off
Off
On
Off
BACnet/IP and BACnet MS/TP Sola 6 Deg_F
On
Off
On
Off
BACnet/IP and BACnet MS/TP Sola 7 Deg_F
Off
On
On
Off
BACnet/IP and BACnet MS/TP Sola 8 Deg_F
On
On
On
Off
BACnet/IP and BACnet MS/TP Sola 1 Deg_C
Off
Off
Off
On
BACnet/IP and BACnet MS/TP Sola 2 Deg_C
On
Off
Off
On
BACnet/IP and BACnet MS/TP Sola 3 Deg_C
Off
On
Off
On
BACnet/IP and BACnet MS/TP Sola 4 Deg_C
On
On
Off
On
BACnet/IP and BACnet MS/TP Sola 5 Deg_C
Off
Off
On
On
BACnet/IP and BACnet MS/TP Sola 6 Deg_C
On
Off
On
On
BACnet/IP and BACnet MS/TP Sola 7 Deg_C
Off
On
On
On
BACnet/IP and BACnet MS/TP Sola 8 Deg_C
On
On
On
On
S0 S1 S2 S3
S0 – S3 DIP Switches
S Bank DIP Switch Location
Figure 3: S Bank DIP Switches
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LAARS’ ProtoNode Startup Guide
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ProtoCarrier DIP
Switches
Profile -FPC-N34-0701
S0
S1
S2
S3
BACnet/IP and BACnet MS/TP Sola 1 Deg_F
Off
Off
Off
Off
BACnet/IP and BACnet MS/TP Sola 2 Deg_F
On
Off
Off
Off
BACnet/IP and BACnet MS/TP Sola 3 Deg_F
Off
On
Off
Off
BACnet/IP and BACnet MS/TP Sola 4 Deg_F
On
On
Off
Off
BACnet/IP and BACnet MS/TP Sola 5 Deg_F
Off
Off
On
Off
BACnet/IP and BACnet MS/TP Sola 6 Deg_F
On
Off
On
Off
BACnet/IP and BACnet MS/TP Sola 7 Deg_F
Off
On
On
Off
BACnet/IP and BACnet MS/TP Sola 8 Deg_F
On
On
On
Off
BACnet/IP and BACnet MS/TP Sola 1 Deg_C
Off
Off
Off
On
BACnet/IP and BACnet MS/TP Sola 2 Deg_C
On
Off
Off
On
BACnet/IP and BACnet MS/TP Sola 3 Deg_C
Off
On
Off
On
BACnet/IP and BACnet MS/TP Sola 4 Deg_C
On
On
Off
On
BACnet/IP and BACnet MS/TP Sola 5 Deg_C
Off
Off
On
On
BACnet/IP and BACnet MS/TP Sola 6 Deg_C
On
Off
On
On
BACnet/IP and BACnet MS/TP Sola 7 Deg_C
Off
On
On
On
BACnet/IP and BACnet MS/TP Sola 8 Deg_C
On
On
On
On
See Appendix B.1 for the Configuration DIP switch settings for -1 through 8 Sola to Metasys N2 and
Modbus TCP/IP.
NOTE: When setting DIP Switches, please ensure that power to the board is OFF.
2.3.1.2 LonWorks DIP Switch Settings
The following chart describes the DIP switch settings for the Sola to support LonWorks on a
ProtoNode FPC-N35.
ProtoCarrier DIP
Switches
Profile -FPC-N35-0702
S0
S1
S2
S3
LonWorks Sola 1
Off
Off
Off
Off
LonWorks Sola 2
On
Off
Off
Off
LonWorks Sola 3
Off
On
Off
Off
LonWorks Sola 4
On
On
Off
Off
LonWorks Sola 5
Off
Off
On
Off
LonWorks Sola 6
On
Off
On
Off
LonWorks Sola 7
Off
On
On
Off
LonWorks Sola 8
On
On
On
Off
NOTE: When setting DIP Switches, please ensure that power to the board is OFF.
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LAARS’ ProtoNode Startup Guide
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2.3.2 BACnet MS/TP (FPC-N34): Setting the MAC Address for BMS Network
•Only 1 MAC address is set for ProtoNode regardless of how many devices are connected to
ProtoNode.
•Set the BACnet MS/TP MAC addresses of the ProtoNode to a value between 1 to 127 (MAC
Master Addresses); this is so that the BMS Front End can find the ProtoNode via BACnet
auto discovery.
•Note: Never set a BACnet MS/TP MAC Address from 128 to 255. Addresses from 128 to
255 are Slave Addresses and can not be discovered by BMS Front Ends that support auto
discovery of BACnet MS/TP devices.
•Set DIP switches A0 –A7 to assign MAC Address for BACnet MS/TP for the ProtoNode
FPC-N34.
•Please refer to Appendix D.1 for the complete range of MAC Addresses and DIP switch
settings.
NOTE: When setting DIP Switches, please ensure that power to the board is OFF.
Figure 4: MAC Address DIP Switches
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LAARS’ ProtoNode Startup Guide
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2.3.3 BACnet MS/TP and BACnet/IP (FPC-N34): Setting the Device Instance
•The A Bank of DIP switches are used for two purposes:
oFor BACnet MS/TP, they are used to set the BACnet MS/TP MAC address. (Section
2.3.2)
oFor both BACnet MS/TP and BACnet/IP, they are also used to determine the BACnet
Device Instance values.
•The BACnet Device Instance can range from 1 to 4,194,303.
•The BACnet device instances will be calculated by taking the Node_Offset (default is 50,000)
found in Web Configurator (Section 2.3.2.1) and adding it to the value of the A Bank DIP
switches.When more than one device is connected to the ProtoNode, the subsequent BACnet
Device Instance values will be sequential from the first/previous device.
For example:
•Given that: Device Instance = Node_Offset + A Bank DIP switch value
oDefault Node_Offset value = 50,000
oA Bank DIP switch value = 11
•Then the Device Instance values for the devices are:
oDevice 1 Instance = 50,011
oDevice 2 Instance will then be 50,011(Device Instance 1) +1 = 50,012
oDevice 3 Instance will then be 50,012 (previous Device Instance) +1 = 50,013
2.3.3.1 BACnet MS/TP or BACnet/IP: Assigning Specific Device Instances
•With the default Node_Offset value of 50,000 the Device Instances values generated will be
within the range of 50,001to 50,127.
•The values allowed for a BACnet Device Instance can range from 1 to 4,194,303.
•To assign a specific Device Instance (or range), change the Node_Offset value.
•Methods for changing the Node_Offset value are provided in Section 4.2
oThis step cannot be performed until after the unit is connected and powered.
2.3.4 Metasys N2 or Modbus TCP/IP (FPC-N34): Setting the Node-ID
•Set DIP switches A0 –A7 to assign aNode-ID for Metasys N2 or Modbus TCP/IP to the
ProtoNode FPC-N34.
•Metasys N2 and Modbus TCP/IP Node-ID Addressing: Metasys N2 and Modbus TCP/IP Node-
ID’s range from 1-255
•Please refer to Appendix D.1 for the full range of addresses for setting Node-ID.
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LAARS’ ProtoNode Startup Guide
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2.3.5 BACnet MS/TP (FPC-N34): Setting the Serial Baud Rate for BMS Network
•DIP Switches B0 –B3 can be used to set the serial baud rate to match the baud rate required
by the Building Management System for BACnet MS/TP.
•DIP Switches B0 –B3 are disabled on ProtoNode FPC-N35 (FPC-N35 LonWorks).
•The baud rate on ProtoNode for Metasys N2 is set for 9600. DIP Switches B0 –B3 are disabled
for Metasys N2 on ProtoNode FPC-N34.
B0 B1 B2 B3
NOTE: When setting DIP Switches, please ensure that power to the board is OFF.
2.3.5.1 Baud Rate DIP Switch Selection
Baud B0 B1 B2 B3
9600
On
On
On
Off
19200
Off
Off
Off
On
38400*
On
On
Off
On
57600
Off
Off
On
On
76800
On
Off
On
On
Figure 6: BMS Baud Rate
* Factory default setting = 38,400
Figure 5: Baud Rate DIP Switches
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LAARS’ ProtoNode Startup Guide
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3INTERFACING PROTONODE TO DEVICES
3.1 ProtoNode FPC-N34 and FPC-N35 Showing Connection Ports
Figure 7: ProtoNode BACnet FPC-N34 (upper) and ProtoNode FPC-N35 (lower)
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3.2 Device Connections to ProtoNode
ProtoNode 6 Pin Phoenix connector for RS-485 Devices
•The 6 pin Phoenix connector is the same for ProtoNode FPC-N34 (BACnet) and FPC-N35
(LonWorks).
•Pins 1 through 3 are for Modbus RS-485 devices.
oThe RS-485 GND (Pin 3) is not typically connected.
•Pins 4 through 6 are for power. Do not connect power (wait until Section 4).
Device Pins ProtoNode Pin
#
Pin
assignment
Pin RS-485 +
Pin 1
RS-485 +
Pin RS-485 -
Pin 2
RS-485 -
Pin GND
Pin 3
RS-485 GND
Power In (+)
Pin 4
V +
Power In (-)
Pin 5
V -
Frame Ground
Pin 6
FRAME GND
Figure 8: Power and RS-485 Connections
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LAARS’ ProtoNode Startup Guide
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3.2.1 Sola wiring to the ProtoNode using Display
•On the System Operator Display COM 2 port, connect terminal A (RS-485+) to Pin 1 (B+) on the
ProtoNode’s 6 pin Phoenix connector. (Figure 9)
•Connect terminal B2 (RS-485-) to Pin 2 (A-) on the ProtoNode’s 6 pin Phoenix connector.
•Pin C (Ground) does not need to be grounded to the ProtoNode.
SYSTEM OPERATOR DISPLAY
A B C A B C
1 2 3 4 5 6 87
24 VAC
(COM)
24 VAC
COM1 COM2
Figure 9: Sola wiring using Display
LAARS Heating Systems
Page 16 of 43
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LAARS’ ProtoNode Startup Guide
Page 17 of 43
3.2.2 Biasing the Modbus RS-485 Device Network
•An RS-485 network with more than one device needs to have biasing to ensure proper
communication. The biasing only needs to be done on one device.
•The ProtoNode has 510 Ohm resistors that can be used to set the biasing. The ProtoNode’s
default positions from the factory for the Biasing jumpers are OFF.
•The OFF position is when the 2 RED biasing jumpers straddle the 4 pins closest to the outside
of the board of the ProtoNode. See Figure 10.
•Only turn biasing ON:
oIF the BMS cannot see more than one device connected to the ProtoNode
oAND you have checked all the settings (Modbus COM settings, wiring, and DIP
switches).
•To turn biasing ON, move the 2 RED biasing jumpers to straddle the 4 pins closest to the inside
of the board of the ProtoNode.
RS-485 Bias
Switch
Figure 10: Modbus RS-485 Biasing Switch on the ProtoNode N34 (left) and ProtoNode N35 (right)
The LAARS Gateway LER and RER Startup Guide Page 17 of 43
20 Industrial Way, Rochester, NH, USA 03867 •(800) 900-9276 • www.Laars.com 1604 Document 4236E

LAARS’ ProtoNode Startup Guide
Page 18 of 43
3.2.3 End of Line Termination Switch for the Modbus RS-485 Device Network
•On long RS-485 cabling runs, the RS-485 trunk must be properly terminated at each end.
•The ProtoNode has an End Of Line (EOL) blue jumper. The default setting for this Blue EOL
switch is OFF with the jumper straddling the pins closest to the inside of the board of the
ProtoNode.
oOn short cabling runs the EOL switch does not to need to be turned ON.
•If the ProtoNode is placed at one of the ends of the trunk, set the blue EOL jumper to the
ON position straddling the pins closest to the outside of the board of the ProtoNode.
•Always leave the single Red Jumper in the A position (default factory setting).
Modbus RS-485
EOL Switch
Leave in A Position
Figure 11: Modbus RS-485 End-Of-Line Termination Switch on the ProtoNode N34 (left) and
ProtoNode N35 (right)
LAARS Heating Systems
Page 18 of 43
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LAARS’ ProtoNode Startup Guide
Page 19 of 43
3.3 BACnet MS/TP or Metasys N2 (FPC-N34): Wiring Field Port to BMS Network
•For BACnet/IP see Section 4for information on connecting to BACnet/IP network
•Connect the BACnet MS/TP or Metasys N2 RS-485 network wires to the 3-pin RS-485
connector on ProtoNode FPC-N34 as shown below in Figure 12.
oThe RS-485 GND (Pin 3) is not typically connected.
•If the ProtoNode is the last device on the BACnet MS/TP or Metasys N2 trunk, then the
End-Of-Line Termination Switch needs to be enabled (Figure 13).
oThe default setting from the factory is OFF (switch position = right side).
oTo enable the EOL Termination, turn the EOL switch ON (switch position = left
side).
3.4 LonWorks (FPC-N35): Wiring Field Port to LonWorks Network
•Connect ProtoNode to the field network with the LonWorks terminal using a twisted pair non-
shielded cable. LonWorks has no polarity.
BMS RS-
485 Wiring
ProtoNode
Pin #
Pin
Assignment
RS-485 +
Pin 1
RS-485 +
RS-485 -
Pin 2
RS-485 -
-
Pin 3
RS-485 GND
Figure 14: LonWorks Terminal
End-of-Line Switch
Figure 13: RS-485 BMS Network EOL Switch
G
-
+
Figure 12: Connection from ProtoNode to RS-485 Field Network
The LAARS Gateway LER and RER Startup Guide Page 19 of 43
20 Industrial Way, Rochester, NH, USA 03867 •(800) 900-9276 • www.Laars.com 1604 Document 4236E

LAARS’ ProtoNode Startup Guide
Page 20 of 43
3.5 Power-Up ProtoNode
Apply power to ProtoNode as show below in Figure 16.Ensure that the power supply used
complies with the specifications provided in Appendix E.1.
•ProtoNode accepts either 9-30VDC or 12-24 VAC on pins 4 and 5.
•Frame GND should be connected.
Power Requirement for ProtoNode External Gateway
Current Draw Type
ProtoNode Family
12VDC/VAC
24VDC/VAC
30VDC
FPC –N34 (Typical)
170mA
100mA
80mA
FPC –N34 (Maximum) 240mA 140mA 100mA
FPC –N35 (Typical)
210mA
130mA
90mA
FPC –N35 (Maximum)
250mA
170mA
110mA
Note: These values are ‘nominal’ and a safety margin should be added to the power supply of the host
system. A safety margin of 25% is recommended.
Figure 15: Required current draw for the ProtoNode
Power to
ProtoNode
ProtoNode
Pin #
Pin
Assignment
Power In (+)
Pin 4
V +
Power In (-)
Pin 5
V -
Frame Ground
Pin 6
FRAME GND
Figure 16: Power Connections
LAARS Heating Systems
Page 20 of 43
20 Industrial Way, Rochester, NH, USA 03867 •(800) 900-9276 • www.Laars.com
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