FULTON ProtoNode FPC-N54 User guide

Document Revision: 3.A
Web Configurator
Template Revision: 4
ProtoNode FPC-N54
Start-up Guide
For Interfacing Fulton Products:
Hydronic_ModSync_SE, Hydronic_SOLA_Master, Hydronic_SOLA,
Hydronic_LMV3, Hydronic_LMV3_And_Yokogawa,
Hydronic_LMV3_And_RWF55, Hydronic_LMV5, Hydronic_PURE_Master,
Hydronic_PURE, Steam_ModSync_SE, Steam_LMV3,
Steam_LMV3_And_Yokogawa, Steam_LMV3_And_RWF55, Steam_LMV5
To Building Automation Systems:
BACnet MS/TP, BACnet/IP and SMC Cloud
APPLICABILITY & EFFECTIVITY
Explains ProtoNode hardware and how to install it.
The instructions are effective for the above as of .

Fulton ProtoNode Start-up Guide
Page 2 of 47
Technical Support
Thank you for purchasing the ProtoNode for Fulton.
Please call Fulton for technical support of the ProtoNode product.
Sierra Monitor Corporation does not provide direct support. If Fulton needs to escalate the concern, they
will contact Sierra Monitor Corporation for assistance.
Support Contact Information:
Fulton Companies
3981 Port Street
Pulaski, New York 13142
Customer Service:
[phone]
For email support, fill out an inquiry on https://www.fulton.com/fultonDotCom/contact-fulton.php.
Website: www.fulton.com

Fulton ProtoNode Start-up Guide
Page 3 of 47
Quick Start Guide
1. Record the information about the unit. (Section 3.1)
2. Check that the ProtoNode and customer device COM settings match. (Section 3.3)
3. Connect the ProtoNode 3 pin RS-485 R1 port to the RS-485 network connected to each of the
devices. (Section 4.1)
4. If using a serial field protocol:
Connect the ProtoNode 3 pin RS-485 R2 port to the field protocol cabling. (Section 4.2)
5. Connect power to ProtoNode 3 pin power port. (Section 4.5)
6. Connect a PC to the ProtoNode via Ethernet cable. (Section 5)
7. Use a web browser to access the ProtoNode Web Configurator page to select the profile of the
device attached to the ProtoNode and enter any necessary device information. Once the device is
selected, the ProtoNode automatically builds and loads the appropriate configuration. (Section 6)
8. Ethernet Network: If using an Ethernet field protocol, use a web browser to access the ProtoNode
Web Configurator page to change the IP Address. (Section 6.5)

Fulton ProtoNode Start-up Guide
Page 4 of 47
TABLE OF CONTENTS
1Certification..........................................................................................................................................7
1.1 BTL Mark –BACnet®Testing Laboratory.......................................................................................7
2Introduction..........................................................................................................................................8
2.1 ProtoNode Gateway .......................................................................................................................8
3ProtoNode Setup..................................................................................................................................9
3.1 Record Identification Data ..............................................................................................................9
3.2 Point Count Capacity and Registers per Device ............................................................................9
3.3 Configuring Modbus Device Communications .............................................................................10
3.3.1 Confirm the Device and ProtoNode COM Settings Match......................................................10
3.3.2 Set Node-ID for Any Device Attached to the ProtoNode ........................................................10
4Interfacing ProtoNode to Devices....................................................................................................11
4.1 Device Connections to ProtoNode ...............................................................................................11
4.1.1 Interfacing ProtoNode to ModSync SE ...................................................................................11
4.1.2 Interfacing ProtoNode to Honeywell SOLA Controller............................................................12
4.1.3 Interfacing ProtoNode to Endura+ (PURE) Controller ............................................................13
4.1.4 Interfacing ProtoNode to Siemens LMV3x Controller.............................................................14
4.1.5 Interfacing ProtoNode to Siemens LMV5x Control .................................................................15
4.1.6 Interfacing ProtoNode to Siemens LMV3x and Yokogawa Controllers ..................................16
4.1.7 Interfacing ProtoNode to Siemens LMV3x and RWF55 Controllers.......................................17
4.2 Wiring Field Port to RS-485 Serial Network .................................................................................18
4.3 Bias Resistors...............................................................................................................................19
4.4 Termination Resistor.....................................................................................................................20
4.5 Power-Up ProtoNode....................................................................................................................22
5Connect the PC to the ProtoNode....................................................................................................23
5.1 Connecting to the ProtoNode via Ethernet...................................................................................23
5.1.1 Changing the Subnet of the Connected PC............................................................................23
6Configure the ProtoNode..................................................................................................................24
6.1 Accessing the ProtoNode Web Configurator................................................................................24
6.2 Select Field Protocol and Set Configuration Parameters.............................................................26
6.3 Set ProtoNode Active Profiles ......................................................................................................27
6.4 Verify Device Communications.....................................................................................................28
6.5 Ethernet Network: Setting IP Address for the Field Network .......................................................29
6.6 How to Start the Installation Over: Clearing Profiles ....................................................................31
7SMC Cloud User Setup, Registration and Login ............................................................................32
Appendix A Troubleshooting...................................................................................................................33
Appendix A.1 Lost or Incorrect IP Address .............................................................................................33
Appendix A.2 Viewing Diagnostic Information ........................................................................................34
Appendix A.3 Checking Wiring and Settings...........................................................................................35
Appendix A.4 LED Diagnostics for Communications Between ProtoNode and Devices........................36
Appendix A.5 Take a FieldServer Diagnostic Capture............................................................................37
Appendix A.5.1 Using the FieldServer Toolbox...................................................................................37
Appendix A.5.2 Using FS-GUI.............................................................................................................40
Appendix B Additional Information.........................................................................................................41
Appendix B.1 Updating Firmware............................................................................................................41
Appendix B.2 Securing ProtoNode with Passwords ...............................................................................42
Appendix B.3 Factory Reset Instructions ................................................................................................43
Appendix B.4 Internet Browsers Not Supported .....................................................................................43
Appendix B.5 Mounting ...........................................................................................................................43
Appendix B.6 Physical Dimension Drawing ............................................................................................44
Appendix C Vendor Information –Fulton...............................................................................................45
Appendix D Reference..............................................................................................................................46
Appendix D.1 Specifications....................................................................................................................46
Appendix D.1.1 Compliance with UL Regulations...............................................................................46

Fulton ProtoNode Start-up Guide
Page 5 of 47
Appendix E Limited 2 Year Warranty......................................................................................................47

Fulton ProtoNode Start-up Guide
Page 6 of 47
LIST OF FIGURES
Figure 1: ProtoNode Part Numbers ..............................................................................................................9
Figure 2: Supported Point Count Capacity ...................................................................................................9
Figure 3: Registers per Device .....................................................................................................................9
Figure 4: COM Settings...............................................................................................................................10
Figure 5: Connections from Devices to the ProtoNode ..............................................................................11
Figure 6: Connection from ProtoNode to RS-485 Field Network................................................................18
Figure 7: Bias Resistor DIP Switches .........................................................................................................19
Figure 8: Termination Resistor DIP Switch.................................................................................................20
Figure 9: Required Current Draw for the ProtoNode ..................................................................................22
Figure 10: Power Connections....................................................................................................................22
Figure 11: Ethernet Port Location...............................................................................................................23
Figure 12: Web App Splash Page...............................................................................................................24
Figure 13: Login Window ............................................................................................................................24
Figure 14: Web App Landing Page.............................................................................................................25
Figure 15: Configure Tab............................................................................................................................25
Figure 16: Web Configurator Showing Protocol Selector Parameter .........................................................26
Figure 17: Web Configurator Showing no Active Profiles...........................................................................27
Figure 18: Web Configurator Active Profile Selection.................................................................................28
Figure 19: Web Configurator Showing Active Profile Additions..................................................................28
Figure 20: Web Configurator Screen ..........................................................................................................29
Figure 21: Changing IP Address via FS-GUI..............................................................................................30
Figure 22: Welcome to SMC Cloud Email ......................................................................................................
Figure 23: Setting User Details.......................................................................................................................
Figure 24: Web App Landing Page –SMC Cloud Tab...................................................................................
Figure 25: Registration Information Page .......................................................................................................
Figure 26: SMC Cloud Connection Problems Message .................................................................................
Figure 27: SMC Cloud Registration Page.......................................................................................................
Figure 28: Device Registered for SMC Cloud.................................................................................................
Figure 29: SMC Cloud Login Page .................................................................................................................
Figure 30: SMC Cloud Privacy Policy.............................................................................................................
Figure 31: SMC Cloud Landing Page .............................................................................................................
Figure 32: Ethernet Port Location...............................................................................................................33
Figure 33: Error Messages Screen.............................................................................................................34
Figure 34: Diagnostic LEDs ........................................................................................................................36
Figure 35: Ethernet Port Location...............................................................................................................37
Figure 36: FS-GUI Passwords Page...........................................................................................................42
Figure 37: Password Recovery Page .........................................................................................................42
Figure 38: DIN Rail......................................................................................................................................43
Figure 39: ProtoNode FPC-N54 Dimensions..............................................................................................44
Figure 40: Specifications.............................................................................................................................46

Fulton ProtoNode Start-up Guide
Page 7 of 47
1 CERTIFICATION
1.1 BTL Mark –BACnet®
1
Testing Laboratory
1
BACnet is a registered trademark of ASHRAE
The BTL Mark on ProtoNode 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 www.BACnetInternational.net for more information about the BACnet
Testing Laboratory. Click here for the BACnet PIC Statement.

Fulton ProtoNode Start-up Guide
Page 8 of 47
2 INTRODUCTION
2.1 ProtoNode Gateway
The ProtoNode is an external, high performance building automation multi-protocol gateway that is
preconfigured to automatically communicate between Fulton’s devices (hereafter simply called “device”)
connected to the ProtoNode and automatically configures them for BACnet/IP and BACnet MS/TP.
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.
FPC-N54 Connectivity Diagram:
The ProtoNode can connect with Sierra Monitor’s SMC Cloud. The SMC Cloud allows technicians, the
OEM's support team and Sierra Monitor's support team to remotely connect to the ProtoNode. The SMC
Cloud provides the following capabilities for any registered devices in the field:
•Remotely monitor and control devices.
•Collect device data and view it on the SMC Cloud Dashboard and the SMC Smart Phone App.
•Create user defined device notifications (alarm, trouble and warning) via SMS and/or Email.
•Generate diagnostic captures (as needed for troubleshooting) without going to the site.
For more information about the SMC Cloud, refer to the SMC Cloud Start-up Guide.

Fulton ProtoNode Start-up Guide
Page 9 of 47
3 PROTONODE SETUP
3.1 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-N54-1851
Figure 1: ProtoNode Part Numbers
•FPC-N54 units have the following 3 ports: RS-485 + Ethernet + RS-485/RS-232
3.2 Point Count Capacity and Registers per Device
The total number of registers presented by the device(s) attached to the ProtoNode cannot exceed:
Part number
Total Registers
FPC-N54-1851
2,500
Figure 2: Supported Point Count Capacity
Devices
Registers Per Device
Hydronic_ModSync_SE
164
Hydronic_SOLA_Master
63
Hydronic_SOLA
41
Hydronic_LMV3
28
Hydronic_LMV3_And_Yokogawa
31
Hydronic_LMV3_And_RWF55
34
Hydronic_LMV5
31
Hydronic_PURE_Master
89
Hydronic_PURE
58
Steam_ModSync_SE
104
Steam_LMV3
28
Steam_LMV3_And_Yokogawa
31
Steam_LMV3_And_RWF55
34
Steam_LMV5
31
Figure 3: Registers per Device

Fulton ProtoNode Start-up Guide
Page 10 of 47
3.3 Configuring Modbus Device Communications
3.3.1 Confirm the Device and ProtoNode COM Settings Match
•Any connected serial devices MUST have the same baud rate, data bits, stop bits, and
parity settings as the ProtoNode.
•Figure 4 specifies the device serial port settings required to communicate with the ProtoNode.
Port Setting
Device
Protocol
Modbus RTU
Baud Rate
19200
Parity
None
Data Bits
8
Stop Bits
1
Figure 4: COM Settings
3.3.2 Set Node-ID for Any Device Attached to the ProtoNode
Set Node-ID for any device attached to ProtoNode. The Node-ID needs to be uniquely assigned between
1 and 255.

Fulton ProtoNode Start-up Guide
Page 11 of 47
4 INTERFACING PROTONODE TO DEVICES
4.1 Device Connections to ProtoNode
The ProtoNode has a 3-pin Phoenix connector for connecting RS-485 devices on the R1 port.
NOTE: Use standard grounding principles for RS-485 GND.
4.1.1 Interfacing ProtoNode to ModSync SE
The Hydronic ModSync SE profile on the ProtoNode shall be selected when the ProtoNode is to be
communicating with the ModSync SE. When selecting the Hydronic ModSync SE profile, set the Node ID
to two(2) . Refer to Section 6.3 for more information regarding active profiles.
Refer to the ModSync SE electrical drawing for specific wiring requirements. The 24VDC transformer
integral to the ModSync SE can be used to power the ProtoNode.
Communication Settings at the ModSync SE:
•From the main status screen select Configure.
•Select BMS Configuration.
•Select the button for Protocol until it shows “BACnet”.
•Select the Update Settings button to confirm settings changes.
•Power may need to be cycled to the Modsync panel before communication will start.
Device Pins
ProtoNode
Pin Label
Pin
Assignment
RS-485 +
TX +
RS-485 +
RS-485 -
TX -
RS-485 -
RS-485 GND
GND
RS-485 GND
Figure 5: Connections from Devices to the ProtoNode
G
-
+

Fulton ProtoNode Start-up Guide
Page 12 of 47
4.1.2 Interfacing ProtoNode to Honeywell SOLA Controller
There are two profiles available when interfacing with the Honeywell SOLA controller. Hydronic Sola is
utilized for each boiler when the all points are needed for each boiler and Hydronic Sola Master is
available for when pulling information from just the Master boiler is sufficient.
Refer to the boiler Installation and Operation Manual and the electrical drawing for specific wiring
requirements. The 24VAC transformer being used to power the SOLA display on Fulton boilers can be
used to also power the ProtoNode. Do not wire the 24VAC ground terminal on the ProtoNode.
SOLA Display Connection
ProtoNode Connection
COM2 A (+)
R1 TX/+
COM2 B (-)
R1 TX/-
COM2 C (SG)
R1 GND
24VAC
L (+)
24VAC (COM)
N (-)
*Do not wire for 24VAC
FG
Figure 6: RS-485 Connections from Honeywell SOLA to the ProtoNode
SOLA Settings at the Boiler:
•From the home screen select Setup on the lower left right corner then select Display Setup.
•Select the COM 2 tab and check the option for Enable COM2 Port. From there, verify that the
baud rate is set to 19200.
•Select the Gateway tab and check both the Enable Modbus Gateway and Gateway on COM2
Port options.
•Press Save on the bottom right corner.
•To set the Modbus address, select Configure from the boiler menu and then select System
Identification and Access from the top of the list.
•Scroll down to MB2 Modbus Address; this should be set to the boilers’ number (boiler 1 is set to
address 1). If login is required, use password sola.
•Power may need to be cycled to the boiler panel before communication will start.
NOTE: If multiple boilers are connected to the ProtoNode and the Hydronic Sola profile is selected
for each boiler, the above procedure will need to be done at each boiler. The Modbus address will
increase with each additional boiler (Boiler 2 MB2 address set to 2, Boiler 3 MB2 address set to 3
and so on). This will also require the Modbus COM2 connection at the displays to be daisy
chained between the boilers.

Fulton ProtoNode Start-up Guide
Page 13 of 47
4.1.3 Interfacing ProtoNode to Endura+ (PURE) Controller
There are two profiles available when interfacing with the Endura+ boiler. Hydronic PURE is utilized
when all Modbus points are needed for each boiler and Hydronic PURE Master is available for when
pulling information from just the Master boiler is sufficient. If the Hydronic PURE profile is selected on the
ProtoNode for each boiler, it will require the boilers to be daisy chained together.
Refer to the Installation and Operation Manual and the electrical drawing for the Endura+ boiler for
specific wiring requirements. Power to the ProtoNode can be supplied from terminals V1+ and V1-
(24VDC) on the TB4 terminal block strip.
EDR+ Connection
ProtoNode Connection
TB4 A (+)
R1 TX/+
TB4 B (-)
R1 TX/-
TB4 C (SG)
R1 GND
TB4 V1+
L (+)
TB4 V1-
N (-)
Figure 7: RS-485 Connections from Endura+ Control to the ProtoNode
Control Settings at the Boiler:
•Reference section 7-1 BMS Integration section of the Installation and Operation Manual Controls
Addendum for the Endura+ boiler for setting the Modbus address for the Endura+ boilers.
•Power may need to be cycled to the boiler panel before communication will start.
NOTE: The A, B and C terminals on the TB4 terminal block strip are for Modbus communication to
the boiler and the AA, BB and CC terminals are for Modbus communication out of the boiler on to
the next device. Please see page 3 of the electrical drawing included with the boiler.

Fulton ProtoNode Start-up Guide
Page 14 of 47
4.1.4 Interfacing ProtoNode to Siemens LMV3x Controller
The LMV3 profile on the ProtoNode shall be selected for boilers where the LMV3x controller installed in
them.
Refer to the boiler Installation and Operation Manual and the electrical drawing for specific wiring
requirements.
LMV3x Controller Settings:
•Simultaneously hold “F” and “A” keys on the AZL display for 1 second and enter the password.
The password is typically the 4-digit national board number.
•Navigate to parameter 145 and change the Modbus address to the boilers’ number (boiler 1 is set
to address 1).
•Navigate to parameter 141 and verify this is set to 1 for Modbus.
•Navigate to parameter 142 and set to 30 for timeout (in seconds).
•Navigate to parameter 146 and set to 1 for 19200 baud rate.
•Navigate to parameter 147 and set to 0 for the parity.
•Escape back to the main screen by simultaneously holding the “-“ and “+” keys.
Note: This procedure will have to be done for each boiler the LMV3 profile is selected for. The
Modbus address will increase with each additional boiler (boiler 2 address set to 2, boiler 3
Address set to 3).

Fulton ProtoNode Start-up Guide
Page 15 of 47
4.1.5 Interfacing ProtoNode to Siemens LMV5x Control
The LMV5 profile on the ProtoNode shall be selected for boilers where the LMV5x controller installed in
them.
Refer to the boiler Installation and Operation Manual and the electrical drawing for specific wiring
requirements.
Terminals 1 / 4 and 2 / 5 on the RWF55 must be jumped to provide proper operation even if it is a single
device with no daisy chain.
LMV5x Controller Settings:
•Press “ESC” to navigate to the main menu. From there, navigate to “Params & Display” then
press enter.
•Select “Access without PW” then press enter. Select “AZL” then press enter.
•Select “Modbus” then press enter.
•Set “Address” to the boilers’ number (boiler 1 is set to address 1).
•Set “Baud Rate” to “19200”.
•Set “Parity” to “no”.
•Set “Time Out” to “30”.
•Set “Local/Remote” to “Remote”.
•Set “Remote Mode” to “Automatic”.
•Press “ESC” two times.
•From the “Params & Display” menu, navigate to “SystemConfig” then press enter.
•Navigate to “LC_OptgMode (U)” and set it to “IntLC Bus”.
•Press “ESC” three times.
•Navigate to “Operation” then press enter. From there navigate to “OptgModeSelect” and press
enter.
•Select “GatewayBASon (U)” and press enter to activate the communication port.
•Navigate to “Type of Gateway (U)” and set it to “Modbus”
•Press “ESC” three times.
Note: This procedure will have to be done for each boiler the LMV5 profile is selected for. The
Modbus address will increase with each additional boiler (boiler 2 address set to 2, boiler 3
Address set to 3).

Fulton ProtoNode Start-up Guide
Page 16 of 47
4.1.6 Interfacing ProtoNode to Siemens LMV3x and Yokogawa Controllers
The LMV3 and Yokogawa profile will be selected in the ProtoNode for installations containing the
Siemens LMV3x and Yokogawa controllers on the boiler. Refer to 4.1.4 above for required LMV3x
controller settings.
Refer to the boiler Installation and Operation Manual and the electrical drawing for specific wiring
requirements. If the Modbus capable Yokogawa is factory installed on the boiler, the Modbus wiring from
the Yokogawa to the boiler terminal blocks will already be installed. If the Modbus capable Yokogawa is
to be installed in the field, the Yokogawa and LMV3x Modbus wiring will need to be installed so that the
devices are in a continuous daisy chain to the ProtoNode.
Terminals 301/304 and 302/305 on the Yokogawa UT32A must be jumped to provide proper operation
even if it is a single device with no daisy chain.
Yokogawa Controller Settings:
•Simultaneously press and hold the “PARA” and left arrow keys for 5 seconds until “Set.M” is
displayed.
•Use the right arrow key to scroll and find the “RS485” menu then press the “SET/Enter” key.
•Set “PSL” to “MBRTU” for Protocol Selection.
•Set “BPS” to “19200” for the baud rate.
•Set “PRI” to “None” for the parity.
•Set “STP” to “1” for the stop bits.
•Set “DLN” to “8” for the data length.
•Set “ADR” to “10 + the LMV Address”. Refer to Figure 8 for LMV and Yokogawa Modbus
addressing.
•If writing the setpoint to the Yokogawa, perform the following:
oPress and hold the “PARA” button for 5 seconds until “OPE.M” is displayed.
oUse the right arrow key to scroll and find the “SPS” menu then press the “SET/Enter” key.
oScroll down to “SPT” and change this to “OFF” for PV Tracking selection.
Boiler 1 LMV Address
1
Boiler 1 Yokogawa Address
11
Boiler 2 LMV Address
2
Boiler 2 Yokogawa Address
12
Boiler 3 LMV Address
3
Boiler 3 Yokogawa Address
13
Figure 8: LMV3x and Yokogawa Modbus Addressing

Fulton ProtoNode Start-up Guide
Page 17 of 47
4.1.7 Interfacing ProtoNode to Siemens LMV3x and RWF55 Controllers
The LMV3 and RWF55 profile will be selected in the ProtoNode for installations containing the Siemens
LMV3x and RWF55 controllers on the boiler. Refer to 4.1.4 above for required LMV3x controller settings.
Refer to the boiler Installation and Operation Manual and the electrical drawing for specific wiring
requirements.
RWF55 Controller Settings:
•Press the “Enter” key once. “OPr” should be displayed.
•Use the up arrow key to navigate to “ConF”. Press the “Enter” key once.
•Use the up arrow key to navigate to “IntF”. Press the “Enter” key once.
•The display should currently show “r485”. Press the “Enter” key once.
•Set “bdrt” to “2” for 19200 baud rate.
•Set “Adr” to “10 + the LMV Address” for the Modbus address. Refer to Figure 9 below for LMV
and RWF55 Modbus addressing.
Boiler 1 LMV Address
1
Boiler 1 RWF55 Address
11
Boiler 2 LMV Address
2
Boiler 2 RWF55 Address
12
Boiler 3 LMV Address
3
Boiler 3 RWF55 Address
13
Figure 9: LMV3x and RWF55 Modbus Addressing

Fulton ProtoNode Start-up Guide
Page 18 of 47
4.2 Wiring Field Port to RS-485 Serial Network
•Connect the RS-485 network wires to the 3-pin RS-485 connector on the R2 port. (Figure 6)
oUse standard grounding principles for RS-485 GND
•See Section 5 for information on connecting to the Ethernet network.
BMS
Wiring
ProtoNode
Pin Label
Pin
Assignment
RS-485 +
+
RS-485 +
RS-485 -
-
RS-485 -
-
GND
RS-485 GND
Figure 10: Connection from ProtoNode to RS-485 Field Network
G
-
+

Fulton ProtoNode Start-up Guide
Page 19 of 47
4.3 Bias Resistors
To enable Bias Resistors, move both the BIAS- and BIAS+ dip switches to the right in the
orientation shown in Figure 7.
The ProtoNode bias resistors are used to keep the RS-485 bus to a known state, when there is no
transmission on the line (bus is idling), to help prevent false bits of data from being detected. The bias
resistors typically pull one line high and the other low - far away from the decision point of the logic.
The bias resistor is 510 ohms which is in line with the BACnet spec. It should only be enabled at one
point on the bus (for example, on the field port were there are very weak bias resistors of 100k). Since
there are no jumpers, many gateways can be put on the network without running into the bias resistor
limit which is < 500 ohms.
NOTE: See www.ni.com/support/serial/resinfo.htm for additional pictures and notes.
NOTE: The R1 and R2 DIP Switches apply settings to the respective serial port.
NOTE: If the gateway is already powered on, DIP switch settings will not take effect unless the
unit is power cycled.
R1 Bias Resistor DIP
Switches (2 and 3)
Figure 11: Bias Resistor DIP Switches
R2 Bias Resistor DIP
Switches (2 and 3)

Fulton ProtoNode Start-up Guide
Page 20 of 47
4.4 Termination Resistor
If the ProtoNode is the last device on the serial trunk, then the End-Of-Line Termination Switch needs to
be enabled. To enable the Termination Resistor, move the TERM dip switch to the right in the
orientation shown in Figure 8.
Termination resistor is also used to reduce noise. It pulls the two lines of an idle bus together. However,
the resistor would override the effect of any bias resistors if connected.
NOTE: The R1 and R2 DIP Switches apply settings to the respective serial port.
NOTE: If the gateway is already powered on, DIP switch settings will not take effect unless the
unit is power cycled.
R1 Termination
Resistor DIP Switch (1)
Figure 12: Termination Resistor DIP Switch
R2 Termination
Resistor DIP Switch (1)