SMC Networks FieldServer FS-EZX-MOD-BAC User guide

Document Revision: 1.B
T18626
FieldServer –EZ Gateway
Modbus to BACnet Start-up Guide
FS-EZX-MOD-BAC
APPLICABILITY & EFFECTIVITY
Effective for all systems manufactured after February 2019.

EZ Gateway Modbus to BACnet Start-up Guide
Contact Information
Technical Support
Please call us for any technical support needs related to the FieldServer product.
Sierra Monitor Corporation
1991 Tarob Court
Milpitas, CA 95035
Website: www.sierramonitor.com
U.S. Support Information:
[phone]
[phone]
Email: [e-mail]
EMEA Support Information:
[phone]
Email: [e-mail]

EZ Gateway Modbus to BACnet Start-up Guide
Table of Contents
TABLE OF CONTENTS
1About the EZ Gateway.........................................................................................................................................6
2Certification..........................................................................................................................................................6
2.1 BTL Mark –BACnet Testing Laboratory ........................................................................................................6
3Supplied Equipment............................................................................................................................................6
4Installing the EZ Gateway...................................................................................................................................7
4.1 Mounting.........................................................................................................................................................7
4.2 DIP Switch Settings........................................................................................................................................8
4.2.1 Bias Resistors .........................................................................................................................................8
4.2.2 Termination Resistor...............................................................................................................................9
4.3 Connecting the R1 Port................................................................................................................................10
4.3.1 Wiring....................................................................................................................................................10
4.3.2 Supported RS-485 Baud Rates by Protocol .........................................................................................10
4.4 Power Up the Device....................................................................................................................................11
5Connect the PC to the EZ Gateway..................................................................................................................12
5.1 Connecting to the Gateway via Ethernet......................................................................................................12
5.1.1 Enable Access Through the Local Browser..........................................................................................12
5.1.1.1 Changing the Subnet of the Connected PC...................................................................................12
5.1.1.2 Changing the IP Address of the EZ Gateway with FieldServer Toolbox .......................................13
5.2 Using Web Configurator GUI........................................................................................................................14
5.2.1 Controls, Status and Log Functions......................................................................................................14
5.2.2 Accessing SMC Cloud .....................................................................................................................14
6Configuring the EZ Gateway ............................................................................................................................15
6.1 Setting up the Connections ..........................................................................................................................15
6.2 Creating Device EZ Profiles .........................................................................................................................16
6.2.1 Using the Device Web Interface to Map BACnet Objects.....................................................................17
6.2.2 Using Excel Profile Generator to Map BACnet Objects........................................................................19
6.2.3 Completing Device Profile Setup ..........................................................................................................20
6.2.4 Export Profile for Backup or Future Use ...............................................................................................21
6.3 Importing a Device Profile ............................................................................................................................22
6.4 Mapping BACnet Output with Device EZ Profiles ........................................................................................23
6.5 Test and Commission the EZ Gateway........................................................................................................24
7Using the Embedded BACnet Explorer...........................................................................................................25
7.1 Discover Device List.....................................................................................................................................26
7.2 View Device Details and Explore Points/Parameters...................................................................................27
7.2.1 Edit the Present Value Field..................................................................................................................30
8SMC Cloud User Setup, Registration and Login............................................................................................32
8.1 User Setup....................................................................................................................................................32
8.2 Registration Process ....................................................................................................................................34
8.3 Login to SMC Cloud .....................................................................................................................................38
Appendix A Troubleshooting...................................................................................................................................40
Appendix A.1. Communicating with the EZ Gateway Over the Network ................................................................40
Appendix A.2. Notes Regarding Subnets and Subnet Masks.................................................................................40
Appendix A.3. Before Contacting Technical Support Take a Diagnostic Capture..................................................41
Appendix A.3.1. Using the FieldServer Toolbox..................................................................................................41
Appendix A.3.2. Using FS-GUI............................................................................................................................44
Appendix A.4. LED Functions .................................................................................................................................45

EZ Gateway Modbus to BACnet Start-up Guide
Table of Contents
Appendix B Reference..............................................................................................................................................46
Appendix B.1. Specifications...................................................................................................................................46
Appendix B.2. Compliance with UL Regulations.....................................................................................................47
Appendix B.3. Dimension Drawing FS-EZX-MOD-BAC .........................................................................................47
Appendix B.4. Address Types and Data Types ......................................................................................................48
Appendix C Limited 2 Year Warranty......................................................................................................................49

EZ Gateway Modbus to BACnet Start-up Guide
Table of Contents
LIST OF FIGURES
Figure 1: DIN Rail Bracket............................................................................................................................................7
Figure 2: DIN Rail Mounted ..........................................................................................................................................7
Figure 3: Bias Resistor DIP Switches...........................................................................................................................8
Figure 4: Termination Resistor DIP Switch...................................................................................................................9
Figure 5: R1 & R2 Connection Ports ..........................................................................................................................10
Figure 6: Required Current Draw for the Gateway.....................................................................................................11
Figure 7: Power Connections......................................................................................................................................11
Figure 8: Ethernet Port Location.................................................................................................................................12
Figure 9: EZ Gateway Landing Page..........................................................................................................................14
Figure 10: Connections Page .....................................................................................................................................15
Figure 11: Device Profiles Page .................................................................................................................................16
Figure 12: Edit Profile Window....................................................................................................................................17
Figure 13: Data Map Window .....................................................................................................................................17
Figure 14: Mapping BACnet Addresses to Modbus Registers ...................................................................................18
Figure 15: Save Button...............................................................................................................................................18
Figure 16: Profile Generator Excel Spreadsheet........................................................................................................19
Figure 17: Device Settings Window............................................................................................................................20
Figure 18: State Table Window...................................................................................................................................20
Figure 19: Notification Class Window.........................................................................................................................21
Figure 20: Save Button...............................................................................................................................................21
Figure 21: Export Profile.............................................................................................................................................21
Figure 22: Importing a Device Profile .........................................................................................................................22
Figure 23: Choose Profile to Load..............................................................................................................................23
Figure 24: Controls Section ........................................................................................................................................23
Figure 25: FS-GUI Connections Screen.....................................................................................................................24
Figure 26: BACnet Explorer Tab.................................................................................................................................25
Figure 27: BACnet Explorer Login Page.....................................................................................................................25
Figure 28: BACnet Explorer Page ..............................................................................................................................26
Figure 29: Discover Window.......................................................................................................................................26
Figure 30: Device List.................................................................................................................................................27
Figure 31: Device Sub-items.......................................................................................................................................27
Figure 32: Full Device Sub-items................................................................................................................................28
Figure 33: Simplified Device Details...........................................................................................................................28
Figure 34: Additional Device Details...........................................................................................................................29
Figure 35: Highlighted Present Value.........................................................................................................................30
Figure 36: Write Property Window..............................................................................................................................30
Figure 37: Updated Present Value .............................................................................................................................31
Figure 38: Welcome to SMC Cloud Email ..................................................................................................................32
Figure 39: Setting User Details...................................................................................................................................33
Figure 40: Web App Landing Page –FieldPoP Tab...................................................................................................34
Figure 41: Registration Information Page...................................................................................................................34
Figure 42: SMC Cloud Connection Problems Message.............................................................................................35
Figure 43: SMC Cloud Registration Page...................................................................................................................36
Figure 44: Device Registered for SMC Cloud.............................................................................................................37
Figure 45: SMC Cloud Login Page.............................................................................................................................38
Figure 46: SMC Cloud Privacy Policy.........................................................................................................................38
Figure 47: SMC Cloud Landing Page.........................................................................................................................39
Figure 48: Ethernet Port Location...............................................................................................................................41
Figure 49: Diagnostic LEDs ........................................................................................................................................45
Figure 50: Specifications.............................................................................................................................................46
Figure 51: EZ Gateway Dimension Drawing...............................................................................................................47

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1 ABOUT THE EZ GATEWAY
EZ Gateway is a high performance, cost effective building and industrial automation multi-protocol
gateway providing protocol translation between serial and Ethernet, devices and networks.
NOTE: For troubleshooting assistance refer to Appendix A, or any of the troubleshooting
appendices in the related driver supplements. Check the Sierra Monitor website for
technical support resources and documentation that may be of assistance.
The EZ Gateway is cloud ready and connects with Sierra Monitor’s SMC Cloud. See Section 5.2.2 for
further information.
2 CERTIFICATION
2.1 BTL Mark –BACnet Testing Laboratory
1
The BTL Mark on EZ Gateway 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.
3 SUPPLIED EQUIPMENT
EZ Gateway
•Preloaded with the Modbus and BACnet drivers.
•All instruction manuals, driver manuals, support utilities are available on the USB drive provided
in the optional accessory kit, or on the Sierra Monitor website.
Accessory kit (optional) (Part # FS-8915-38-QS) includes:
•7-ft Cat-5 cable with RJ45 connectors at both ends
•Power Supply -110/220V (p/n 69196)
•Screwdriver for connecting to terminals
•USB Flash drive loaded with:
oModbus to BACnet Start-up Guide
oFieldServer Configuration Manual
oAll FieldServer Driver Manuals
oSupport Utilities
oAny additional folders related to special files
configured for a specific EZ Gateway
oAdditional components as required - see driver manual supplement for details
1 BACnet is a registered trademark of ASHRAE.

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4 INSTALLING THE EZ GATEWAY
4.1 Mounting
The EZ Gateway can be mounted using the DIN rail mounting bracket on the back of the unit.
NOTE: For dimension details see Appendix B.3.
Figure 1: DIN Rail Bracket
Figure 2: DIN Rail Mounted
Din Rail
Bracket

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4.2 DIP Switch Settings
4.2.1 Bias Resistors
To enable Bias Resistors, move both the BIAS- and BIAS+ dip switches to the right in the
orientation shown in Figure 3.
The EZ Gateway 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 EZ 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 3: Bias Resistor DIP Switches
R2 Bias Resistor DIP
Switches (2 and 3)

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4.2.2 Termination Resistor
If the EZ Gateway 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 4.
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.
Figure 4: Termination Resistor DIP Switch
R1 Termination
Resistor DIP Switch (1)
R2 Termination
Resistor DIP Switch (1)

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4.3 Connecting the R1 Port
For the R1 Port only: Switch between RS-485 and RS-232 by moving the number 4 DIP Switch left for
RS-485 and right for RS-232 (Figure 4).
The R2 Port is RS-485.
Connect to the 3-pin connector(s) as shown below.
4.3.1 Wiring
RS-485
RS-232
BMS RS-485
Wiring
Gateway Pin
Assignment
BMS RS-232
Wiring
Gateway Pin
Assignment
RS-485 +
TX +
RS-232 -
TX +
RS-485 -
RX -
RS-232 +
RX -
GND
GND
GND
GND
NOTE: Use standard grounding principles for GND.
4.3.2 Supported RS-485 Baud Rates by Protocol
The supported baud rates for either port is based on the protocol of the connected devices.
The following baud rates are supported for Modbus RTU:
2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200
The following baud rates are supported for BACnet MS/TP:
9600, 19200, 38400, 76800
TX+ RX- GND
+ - GND
Figure 5: R1 & R2 Connection Ports

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4.4 Power Up the Device
Check power requirements in the table below:
Power Requirement for External Gateway
Current Draw Type
EZ Gateway Family
12VDC
24V DC/AC
FS-EZ3-MOD-BAC (Typical)
250mA
125mA
FS-EZ4-MOD-BAC (Typical)
250mA
125mA
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 6: Required Current Draw for the Gateway
Apply power to the EZ Gateway as shown below in Figure 7. Ensure that the power supply used
complies with the specifications provided in Appendix B.1.
•The gateway accepts 12-24VDC or 24VAC on pins 4 and 5.
•Frame GND should be connected.
Power to
Gateway
Gateway
Pin #
Pin
Assignment
Power In (+)
Pin 4
V +
Power In (-)
Pin 5
V -
Frame Ground
Pin 6
FRAME GND
Figure 7: Power Connections

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5 CONNECT THE PC TO THE EZ GATEWAY
5.1 Connecting to the Gateway via Ethernet
First, connect a Cat-5 Ethernet cable (straight through or cross-over) between the local PC and the EZ
Gateway.
5.1.1 Enable Access Through the Local Browser
There are two methods to enable access to the EZ Gateway in the local browser, either by
changing the subnet of the connected PC (Section 5.1.1.1) or using the FieldServer Toolbox to
change the IP Address of the EZ Gateway (Section 5.1.1.2).
NOTE: Only perform one method or the other.
5.1.1.1 Changing the Subnet of the Connected PC
The default IP Address for the EZ Gateway is 192.168.2.101, Subnet Mask is 255.255.255.0. If the PC
and EZ Gateway are on different IP networks, assign a static IP Address to the PC on the 192.168.1.xxx
network.
For Windows 10:
•Find the search field in the local computer’s taskbar (usually to the right of the windows icon )
and type in “Control Panel”.
•Click “Control Panel”, click “Network and Internet” and then click “Network and Sharing Center”.
•Click “Change adapter settings” on the left side of the window.
•Right-click on “Local Area Connection” and select “Properties” from the dropdown menu.
•Highlight and then click the Properties button.
•Select and enter a static IP Address on the same subnet. For example:
•Click the Okay button to close the Internet Protocol window and the Close button to close the
Ethernet Properties window.
Ethernet Port
Figure 8: Ethernet Port Location

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5.1.1.2 Changing the IP Address of the EZ Gateway with FieldServer Toolbox
•Ensure that FieldServer Toolbox is loaded onto the local PC. Otherwise, download the
FieldServer-Toolbox.zip via the Sierra Monitor website’s Software Downloads.
•Extract the executable file and complete the installation.
•Double click on the FS Toolbox Utility and click Discover Now on the splash page.
•Find the desired gateway and click the Configure Device button (gear icon) to the right of the
gateway information.
NOTE: If connectivity status is green, then the IP Address doesn’t need to be changed (the EZ
Gateway is already on the same subnet). Skip the rest of the section and go to Section 5.2.
•Select Network Settings in the Configure Device window.
•Modify the IP Address (N1 IP Address field) of the gateway Ethernet port.
oChange additional fields as needed
NOTE: If the gateway is connected to a router, the Default Gateway field of the gateway should be
set to the IP Address of the connected router.
NOTE: Do not change the DHCP Server State (N1 DHCP Server State field).
NOTE: If DNS settings are unknown, set DNS1 to “8.8.8.8” and DNS2 to “8.8.4.4”.
•Click Update IP Settings, then click the “Change and restart” button to reboot the Gateway and
activate the new IP Address. See the FieldServer Toolbox and GUI Manual for more information.

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5.2 Using Web Configurator GUI
•Open a web browser and connect to the EZ Gateway’s default IP Address. The default IP
Address of the FieldServer is 192.168.2.101, Subnet Mask is 255.255.255.0.
•If the PC and the EZ Gateway are on different IP networks, assign a static IP Address to the PC
on the 192.168.2.X network.
5.2.1 Controls, Status and Log Functions
Along the right side of every Web Configurator GUI page is a column of buttons and event generated
messages.
•Controls Panel –Contains the following four buttons:
oReload –Resets all settings to the last saved configuration
oDefaults –Resets all settings to the default configuration
oSave –Records all settings
oRestart –Reboots the Gateway
•Status Information –Shows Gateway messages such as whether the Gateway is online,
element validation status, unsaved settings, etc.
•Log Messages –Lists last five events and when they were performed.
5.2.2 Accessing SMC Cloud
The FieldPoP™ tab (see Figure 9) allows users to connect to the SMC Cloud, Sierra
Monitor’s device cloud solution for IIoT. The SMC Cloud enables secure remote connection to field
devices through a FieldServer and its local applications for configuration, management, maintenance. For
more information about the SMC Cloud, refer to the SMC Cloud Start-up Guide.
Figure 9: EZ Gateway Landing Page

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6 CONFIGURING THE EZ GATEWAY
6.1 Setting up the Connections
•Open the Connections page to configure the connection ports and parameters.
•Click the Save button in the Controls section once completed.
•Then click Restart to implement the new settings.
Figure 10: Connections Page

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6.2 Creating Device EZ Profiles
•Open the Device Profiles page to create a new profile.
•Create a data map using one of two methods:
oCreate Modbus to BACnet mapping using the Web Interface (Section 6.2.1)
oCreate Modbus to BACnet mapping using Excel Profile Generator (Section 6.2.2)
•After saving the data map, complete the profile setup by updating State Tables and Notification
Classes as needed. (Section 6.2.3)
Figure 11: Device Profiles Page

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6.2.1 Using the Device Web Interface to Map BACnet Objects
NOTE: The Add button creates another blank profile that must be mapped using the Web
Interface.
•Click on the Edit button (pencil icon) next to the name of the profile to map.
•Enter the Modbus and BACnet parameters.
NOTE: See for Appendix B.4 additional information on Address Type.
•Click on the Data Map tab and add the first Modbus address range.
NOTE: Check the Signed Value checkbox (right of the data map entry) if signed values are
needed.
Figure 13: Data Map Window
Figure 12: Edit Profile Window

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•Click on the blue plus sign icon on the left side of the Address to map the BACnet Addresses to
the Modbus Registers.
NOTE: The Advanced button (eye icon) allows additional settings, including: Intrinsic Reporting,
Bit Extraction, scaling and more.
•Repeat for all of the Modbus registers.
•Once all mappings are defined, click the “Save” button in the bottom left corner of the window to
record the Profile.
Figure 15: Save Button
Figure 14: Mapping BACnet Addresses to Modbus Registers

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6.2.2 Using Excel Profile Generator to Map BACnet Objects
•From the Device Profiles page (Figure 11), click on the “Download Excel Profile Generator”link
to download the Excel spreadsheet used to create the profile to the default download folder on
the local PC.
•Open the downloaded Excel spreadsheet and ensure that the content is not disabled by security
settings (yellow security warning bar across the top of the spread sheet).
NOTE: If the security warning is present simply click the Enable Content button found at the end
of the warning.
•Click the Data Map tab (near the bottom of the Excel spreadsheet).
•Edit or copy in Modbus registers as needed.
•Once all the point mappings are complete, switch back to the Generate Profile tab.
•Click the Generate Profile button to create a new Excel .csv file titled “My Modbus Profile”.
•Go back to the EZ Gateway Device Profiles page (Figure 11) and click the Import button.
•Select the Excel .csv file and click the checkbox to load the mapping.
•Once all mappings are loaded, click Save in the Controls section.
Figure 16: Profile Generator Excel Spreadsheet

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6.2.3 Completing Device Profile Setup
•Click on the Edit button (pencil icon) next to the name of the profile to complete setup.
•If a data map was loaded from a file created from the “Excel Profile Generator”, go to the Device
Settings tab to enter the Modbus and BACnet parameters.
NOTE: See for Appendix B.4 additional information on Address Type.
•If using a BACnet State Table, click on the “State Table” tab to define the table and its variables.
Figure 18: State Table Window
Figure 17: Device Settings Window