TechnipFMC Smith Meter Instruction manual

Smith Meter®
Networked Meter Block
Installation, Operation, &
Maintenance Manual
Bulletin MNET001 Issue/Rev. 0.0 (7/21)
July 2021

Network Meter Block Installation, Operation, & Maintenance Manual
i
Important
All information and technical specifications in this document have been carefully checked and compiled by
the author; however, we cannot completely exclude the possibility of errors. TechnipFMC is always grateful
to be informed of any errors; contact us at TechnipFMC.com.
Caution
The default or operating values used in this document and in the configuration parameters of the
Networked Meter Block are for factory testing only and should not be construed as default or operating
values for your metering system. Each metering system is unique and each configuration parameter must
be reviewed and programmed for that specific metering system application.
Disclaimer
TechnipFMC hereby disclaims all responsibility for damages, including but not limited to consequential
damages arising out of or related to the inputting of incorrect or improper program or default values
entered in connection with the Networked Meter Block.
Technical Support
Field Service Response Center
24/7 Technical Support/Schedule a Technician: +1 844.798.3819
System installation supervision, startup, and commissioning services are available.
Customer Support
Customer Service
TechnipFMC
Measurement and Production Solutions
1602 Wagner Avenue
Erie, PA 16510 USA
+1 814.898.5000
[e-mail]
TechnipFMC.com
Literature Library
http://info.smithmeter.com/literature/

Network Meter Block Installation, Operation, & Maintenance Manual
Contents ii
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1.1 NMB Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Included Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 Integral Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Ancillary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Receipt of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Storage Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Warnings and Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5.1 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5.2 Hazardous Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5.2.1 Precautions in Hazardous Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5.3 Electrostatic Discharge Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5.4 RF Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5.5 Weights & Measures Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Pre-Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Electrical Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1.1 Division 2/Zone 2 Hazardous Area Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.2 External Fuse Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.3 Typical Wire Sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Real-Time Clock Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1 Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Installing a Panel-Mounted NMB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2 Installing the NMB with an Instrument Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.3 Installing the NMB or NMT on a Turbine Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.3.1 Pulse Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.4 Connecting to a PRIME 4 or Genesis PD Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.4.1 PRIME 4 Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.4.2 Genesis Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Electrical Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.1 Evaluation Standards Used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Network Meter Block Installation, Operation, & Maintenance Manual
Contents iii
3.2.2 North American Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.3 ATEX and IECEx Zone 1 Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.4 ATEX and IECEx Zone 2 Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.5 Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Finishing and Testing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3.2 Network Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Monitoring and Configuring the NMB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Remotely Accessing the NMB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1.1 Accessing the NMB Using a Web Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1.1.1 Setting an Initial IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1.1.2 Launching the NMB Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.2 Communicating with a PLC or SCADA System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.2.1 Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.2.2 Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.3 Communicating with an MQTT-Protocol Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.2 Implementing Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3 Configuring Your NMB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3.1 Accessing the Configuration Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3.2 Navigating the Configuration Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.3 Configuring Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.3.1 Viewing I/O Statuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.3.2 Calibrating Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.3.3 Configuring Basic Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3.4 Configuring Meter Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.4.1 Viewing Meter Flow Rates & Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.4.2 Configuring General Meter Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.4.3 Meter Linearization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.5 Configuring Turbine Meter Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.5.1 Viewing the Turbine Meter Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.5.2 Enabling Turbine Meter Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.5.3 Re-Characterizing a Turbine Meter’s Signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.6 Viewing System Status Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.6.1 Viewing OLED Display Panel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.6.2 Adding Custom Messages to the OLED Display Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.6.3 Viewing Recent Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.6.4 Viewing Server Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.6.5 Viewing Hardware Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.6.6 Viewing Firmware Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.7 Configuring Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.7.1 Changing Your NMB’s IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.7.2 Configuring NPT Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Network Meter Block Installation, Operation, & Maintenance Manual
Contents iv
4.3.7.3 Configuring MQTT Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3.7.4 Adding an Instrument Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.8 Restoring Factory-Default Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.9 Rebooting the NMB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.10 Backing Up Your Configuration Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.11 Restoring Your Configuration from a Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4 Using the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4.1 Launching the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4.2 Changing Your NMB’s Login Credentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.4.3 Viewing Security Certificates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.4.4 Updating Your NMB’s Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.4.5 Re-Launching the NMB Firmware and Exiting the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5 Monitoring and Resetting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5.1 Alarm Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5.1.1 Alarm Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5.1.2 Alarm Severity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.5.2 Resetting Alarms in the NMB’s Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.5.2.1 Resetting All Latched Alarms at Once. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5.2.2 Resetting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5.3 Resetting Alarms via MQTT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5.4 Resetting Alarms via Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.1 Replacing the Clock Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Appendix A: Data Reference for RESTful and MQTT Schemas ............... A-1
Schemas Defining Content of JSON/XML Data Structures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
JSON-Formatted Data Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
XML-Formatted Data Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Network Meter Block Installation, Operation, & Maintenance Manual
Introduction 1
1 Introduction
This manual provides guidance for the installation, operation, and maintenance of the Smith Meter
Networked Meter Block (NMB). When installed following the guidelines contained in this manual, the NMB
should provide many years of safe, accurate, and reliable use.
1.1 Product Description
The NMB is a Ethernet network-enabled field input/output (I/O) device with the ability to connect peripheral
devices to standard industrial infrastructure, especially cloud applications. It also is capable of local control,
such as basic logic and closed loop algorithms. For example, it can communicate a meter’s flow rate and
additional data through open communication protocols. Users can access the meter data remotely over the
network in near real-time and communicate back to the NMB using common tools, such as a Web browser.
The NMB makes it possible to eliminate much of the expense of today's multi-layered hardware
infrastructures and specialized tools, reducing the overall cost to achieve total system integration.
Additionally, NMB models with Turbine Meter Diagnostic firmware—developed specifically for liquid turbine
meters—ensures the accuracy of measurements by detecting potential issues as they occur in real time.
1.1.1 NMB Models
Several models of the NMB are available, with a unique model code identifying each variant, such as
NMB-XP-TMD-06. The following table provides details about the available options for your NMB and its
model codes:
Additionally, the DIN rail mounting kit—designed to be used for a single panel-mounted NMB—also may
be purchased with your NMB.
These models represent standalone versions of the NMB and are designed to be used for retrofit
applications. You also may order the NMB as a factory-installed accessory when purchasing any of
TechnipFMC’s turbine or positive displacement (PD) meters.
Table 1: NMB Model Codes
Block Type Mounting Type Firmware Accessories
NMB: Networked Meter
Block that interfaces
directly with a digital meter
pulse signal
NMT: Networked Meter
Block with a preamplifier
front end to connect directly
with low-voltage pickup
coils on a turbine meter
PM: Panel mounted
XP: Aluminum alloy explo-
sion-proof instrument hous-
ing
SS: Stainless steel explo-
sion-proof instrument hous-
ing
NMB-STD: Standard firm-
ware for raw I/O, meter,
and communications
NMB-TMD: Standard NMB
firmware plus Turbine
Meter Diagnostic firmware
06: Meter block and PA-6
turbine meter pulse trans-
mitter (enclosure required)
11: Meter block and PA-11
turbine meter pulse trans-
mitter (enclosure required)

Network Meter Block Installation, Operation, & Maintenance Manual
Introduction 2
1.2 Included Equipment
1.2.1 Integral Equipment
The following equipment is integral on the NMB:
• Two RJ45 port connections
• Three-port switch for ETH1, ETH2, and an internal processor
• Light-emitting diode (LED) for port speed and activity
1.2.2 Ancillary Equipment
The following ancillary equipment is included with the NMB:
• 10/100Base-TX Ethernet cable (based on IEEE 802.3 standards)
1.3 Receipt of Equipment
When you receive your NMB, you should check the exterior packing case for any shipping damage.
Carefully remove the unit from the exterior packing case and inspect it for damaged or missing parts.
Ensure you received your purchased options. For details about NMB models and optional accessories,
see Table 1: NMB Model Codes.
Prior to installation, the unit should be stored in its original packing case and protected from adverse
weather conditions and abuse.
1.4 Storage Instructions
To ensure your NMB is not corroded or damaged by moisture or water before being installed, it must be
properly stored using the following instructions:
• Keep the unit in a dry, protected location.
• Avoid storing the unit outside; if you must store it outside, ensure it is protected from the elements.
• For NMBs purchased with an instrument housing, use the following additional storage guidelines:
If the packing case is damaged, contact the shipping carrier immediately regarding their liability.
If the NMB is damaged or parts are missing, a written report must be submitted to:
TechnipFMC
c/o Inside Sales Department, Measurement & Production Solutions
PO Box 10428
Erie, PA 16514

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Introduction 3
• Ensure the conduit port on the back of the instrument housing is closed with the factory-provided
¾-inch NPT plug.
• Retain the factory-provided vapor desiccant sack, which should be secured with double-sided tape
inside the housing.
• Keep the cover mounted to the instrument housing to protect the electronics.
• If your NMB is installed, but is awaiting start-up or commissioning, use the following guidelines to
protect your unit:
• Use a conduit seal-off fitting based on applicable electrical codes.
• Do not leave the unit installed with an open seal-off fitting or cover removed.
1.5 Warnings and Precautions
Before you begin, please read all of the following warnings and cautions to reduce the risk of injury,
equipment damage, or malfunction.
1.5.1 Configuration
The NMB is shipped from the factory in a completely initialized state and must be properly configured for
the specific installation prior to operation. The unit will not operate properly until the configuration is
completed. Configuration parameters can be set using a personal computer’s (PC) Web browser via the
Web browser interface.
1.5.2 Hazardous Locations
Some models are approved for use in an explosive environment (Class I, Division 1, Groups C and D and
Zone 1 Ex d ia, IIB Gb), but specific installation methods are required to produce a comprehensive
explosion-proof system. This manual only provides guidance for the installation of the NMB and using its
firmware. In general, keeping the front cover closed in accordance with the instructions is key to
maintaining explosion protection, along with following all local installation codes and requirements.
1.5.2.1 Precautions in Hazardous Locations
Note that when operating the NMB in hazardous locations, special care must be taken with shielding
termination to ensure signal integrity (see Section 3.2.5: Typical Wiring Diagrams for more information).
ATEX-approved installations have special requirements; see Section 3.2.3: ATEX and IECEx Zone 1
Installations and Section 3.2.4: ATEX and IECEx Zone 2 Installations for details.
To ensure the correct operation, see Section 3.2.5: Typical Wiring Diagrams for field input/output wiring
diagrams.
Any modification of the instrument housing invalidates the hazardous location rating of the NMB. For
example, do not drill or machine the housing.

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Introduction 4
1.5.3 Electrostatic Discharge Precautions
Electronic components are susceptible to damage by static discharge. To minimize the risk of damage, the
following precautions should be followed:
• Before touching a circuit board with hands or tools, personnel and tools should be grounded using a
wrist strap.
• Avoid touching components or traces on the circuit boards and handle by the edges or mounting holes.
• Circuit boards should be kept in conductive bags when not installed.
1.5.4 RF Radiation
The NMB generates, uses, and can radiate radio frequency (RF) energy and, if not installed and used in
accordance with this manual, may cause interference to radio communications. It has not been tested to
comply with the limits pursuant to the Federal Communications Commission’s (FCC) Code of Federal
Regulations, Title 47, Part 15 (47 CFR 15), as electronic control equipment used by an industrial complex
is exempt from these rules.
Operation of this equipment in a residential area may cause interference, in which case the user, at their
own expense, will be required to take whatever measures that may be required to correct the interference.
1.5.5 Weights & Measures Requirements
The NMB is a device that is marketed for a global market. Requirements regarding weights and measures
may vary depending on the region. Users are required to verify that the device is configured and operated
in a manner consistent with local codes and that proper notification (permit for use) or registration has
been filed with the local authority or jurisdiction for this type of device if used to transmit legally relevant
data. This device is intended as a diagnostic tool.

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Pre-Installation Considerations 5
2 Pre-Installation
Considerations
2.1 Electrical Installation Considerations
In addition to the following installation recommendations, all previous warnings and cautions should be
reviewed before installation.
• All wiring into the NMB must be routed through the cable entries.
• The direct current (DC) signal wires must be shielded multi-conductor cable of 18 to 24 American wire
gauge (AWG) minimum stranded copper.
• It is recommended that ferrules be installed on all stranded copper signal wiring.
2.1.1 Power Supply
The NMB requires an external power supply (not included) with a voltage range between 12 to 24 volts
direct current (VDC). The power supply must be assigned a switch or power-circuit breaker (suitable for
the area’s hazardous classification) so the primary side of the power supply can be easily disconnected
from the alternating current (AC) mains electric power. The switch or power-circuit breaker should be
clearly marked as to its function.
We recommend that the power supply meet one of the following standards, depending on your local
jurisdictions:
• EN/IEC/UL/CSA 62368-1
• Safety Extra Low Voltage (SELV)
• Protective Extra Low Voltage (PELV)
• United Laboratories (UL) 508
• National Electrical Code (NEC) Class 2
For additional details about the power supply, see Section 3.3.1: Power Supply.
The following recommendations are based on our knowledge of electrical codes. Your local electrical
codes should be reviewed to ensure that these recommendations follow the local code. Additionally,
you should review the installation manuals for all the equipment being wired into the NMB for
transmission distances and wire recommendations.
The NMB and ancillary electrical support equipment should only be installed by properly trained
personnel. The installer must comply with all national and international regulations for their location
regarding the installation of electrical systems.
Substitutions within the NMB or other certified ancillary equipment is not allowed and will void Ex safety
certifications.
Always follow the manufacturer’s recommendations and warnings when installing the power supply.

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Pre-Installation Considerations 6
2.1.1.1 Division 2/Zone 2 Hazardous Area Considerations
If the user-supplied power supply will be mounted in a control cabinet located in a Division 2/Zone 2
hazardous area, it must be certified for use in that area. The complete system requires certification,
including but not limited to the evaluation of the NMB, power supply, connectors, fuses, internal wiring, and
routing that is required to complete the control cabinet or panel. The standards used for these hazardous
locations include UL ANSI/ISA 12.12.01 (Division 2) and EN/IEC 60079-7 or EN/IEC 6079-15 (Zone 2);
additional standards may apply.
The NMB is rated to be mounted in Class I, Division 2, Groups C and D or Zone 2 Ex ec IIB hazardous
locations with a temperature rating of T4 over the ambient temperature range of -40 °C to 60 °C. When
choosing a certified power supply, ensure it has been evaluated for shock and personal safety of ignition
hazard assessments, which include the maximum surface temperature expected during operation at
maximum-rated ambient temperatures.
2.1.2 External Fuse Protection
The NMB is equipped with a non-replaceable, internal fuse on the DC supply input to comply with required
safety standards. To protect the internal fuse, an external, user-supplied over-current protection (maximum
1.0 amp fuse) should be integrated into the DC power system installation wiring to the NMB.
2.1.3 Typical Wire Sizes
Typical wire sizes used when installing the NMB are as follows:
To maintain these ratings, the selected power supply must meet or exceed these ratings; otherwise, the
ratings of the overall system will be that of the power supply.
Table 2: Typical Wire Sizes
Equipment Number and Gauge of Wire Belden Number or
Equivalent
Transmitters 4/18 gauge
4/20 gauge
9418
8404
Temperature probes and density/
pressure transmitters
4/22 gauge 8729 or 9940
Ethernet Cat 5 or Cat 6 1584A or 2412
DC power supply 2/20 gauge (maximum length of 750
feet/230 meters)
2/18 gauge (maximum length of 1,000
feet/300 meters)
2/16 gauge (maximum length of 1,500
feet/460 meters)
Maximum wire length accounts for point-to-point distance from the source to the device for supply
and return.

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Pre-Installation Considerations 7
2.2 Real-Time Clock Synchronization
Three Network Time Protocol (NTP) servers are configured to synchronize the NMB’s clock with
Coordinated Universal Time (UTC) the first time a connection is made between the servers and the NMB.
Users cannot manually set or change the clock, nor select a time zone; however, you can change the
servers to suit your location (see Section 4.3.7.2: Configuring NPT Server Settings).
A coin cell battery maintains the clock’s settings curing a power cycle. This battery may need to be
replaced over time; for instructions, see Section 5.1: Replacing the Clock Battery.
All timestamps by the NMB, such as those recorded in logs, are in UTC.

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Installation 8
3 Installation
3.1 Physical Installation
The following sections provide guidelines on installing your NMB when purchased as a standalone unit
(without a Smith Meter Turbine or PD meter). Standalone NMBs can be panel mounted on a DIN rail or,
when purchased with an explosion-proof instrument housing, directly mounted to a meter.
3.1.1 Installing a Panel-Mounted NMB
You can install a standalone NMB (without an enclosure) in nonclassified areas remotely from the meter,
assuming the meter transmits pulses to an existing device, such as a flow computer or batch controller.
The NMB’s inputs can accept an amplified meter pulse train (such as those sent to a flow computer). The
NMB’s meter pulse inputs have sufficient impedance that operation of an existing flow computer should not
be affected by sending pulse data into the NMB in parallel.
A standalone NMB can be wired the same as a meter-mounted NMB with a pulse transmitter included
(such as Smith Meter’s PA-6 Preamplifier; see Section 3.2.5: Typical Wiring Diagrams).
The NMB can be mounted directly to a panel using the two through-holes. Optionally, it can be purchased
with an 35-mm DIN rail mounting kit, designed specifically for a single panel-mounted meter block.
When planning a custom DIN rail layout, you must allow adequate spacing for air circulation around each
NMB sharing the same DIN rail; a minimum of 6 mm (.24 inch) is recommended. Adequate spacing also
should be allowed between any adjacent, parallel DIN rails for cable runs; a minimum center-to-center
distance of 120 mm (4.7 inches) is recommended. The center-to-center distance used should also factor in
the minimum spacing requirements for any other equipment mounted on the DIN rail.
The NMB is certified to allow installation into Class I, Division 2, Zone 2 hazardous locations when it is
installed in an appropriate electrical enclosure with a minimum ingress protection (IP) rating of IP54.
It is the installer’s responsibility to ensure that all applicable local electrical safety codes are followed
when integrating the Smith Meter NMB into a custom enclosure. It may be required that the complete
electrical enclosure system be certified by a national authority.
The NMB also may be installed in ordinary, non-hazardous locations and has been evaluated to
Underwriters Laboratories (UL) 508 – Industrial Control Equipment, a standard regarding fire and shock
safety. This standard also is used to satisfy the requirements of European Union (EU) Directive 2014/
35/EU regarding low voltage.

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Installation 9
The DIN rail mounting kit includes:
• One DIN rail mounting bracket
• Two M3 x .5 mm x 30 mm stainless steel
screws
• Two M3 x .5 mm stainless steel locknuts
To install the NMB using the DIN Rail Mounting
kit, first mount the DIN rail mounting bracket to
the NMB using the supplied screws and
locknuts. You can then mount the bracket to your
DIN rail.
3.1.2 Installing the NMB with an Instrument Housing
An NMB purchased with an instrument housing is certified for installation in Class I, Division 1, Zone 1 and
Class I, Division 2, Zone 2 hazardous locations. You also can install it in non-hazardous environments as it
has been evaluated to UL 508 – Industrial Control Equipment, a standard regarding fire and shock safety;
this standard also is used to satisfy the requirements of EU Directive 2014/35/EU regarding low voltage.
NMBs with an included instrument housing can be installed using one of the following methods:
• Mount the NMB directly to a meter using the instrument housing’s 1-inch NPT conduit hub. When
using rigid conduit systems, we highly recommend using conduit unions to later ease removing the
NMB housing from the meter fitting for servicing.
• Mount the NMB to a panel or rack using the two integral mounting feet. All ancillary conduit fittings and
cable glands must be certified according to your local electrical installation codes. Additionally, any
fittings (stopping boxes) or cable glands are required to be sealed for Division 1, Zone 1 installations.
The following dimensional drawings are provided to help you plan the installation of the NMB’s instrument
housing.
This installation expects the bracket to be mounted to a standard 35 mm wide DIN rail, which is not
supplied in this kit.
It is the installers’ responsibility to ensure that all applicable local electrical safety codes and installation
practices are followed.
Figure 1: NMB with DIN Rail Mounting Kit
Figure 2: Enclosure Installation

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Installation 10
After installing your NMB, the qualified installer must indicate the type of environment in which the NMB
was installed using a stamping die (such as an “x”) in the box next to the appropriate zone type on the
housing’s name plate.
Class I, Division 1, Zone 1 areas are identified as Ex db IIB T6 Gb -40 °C ≤ Ta ≤ 60 °C
Class I, Division 2, Zone 2 areas are identified as Ex ec IIB T6 Gc -40 °C ≤ Ta ≤ 60 °C
3.1.3 Installing the NMB or NMT on a Turbine Meter
To communicate meter information, the NMB is designed to be easily connected to a turbine meter using
traditional low voltage pickup coils. The following options are available for connecting the NMB with a
turbine meter, depending on your NMB model:
• Models beginning with “NMB” directly interface with a digital meter pulse signal; for example, the
output of a preamplifier, such as the Smith Meter PA-6 or PA-11 Preamplifier, (see Figure 9: Meter
Pulse Inputs from a PA-6 Transmitter (NMB Models Only) for connections).
• Models beginning with “NMT” include a preamplifier front end so it can connect directly to a low voltage
pickup coil (see Figure 12: Wiring the NMT Directly to Pickup Coils in Sentry, Guardsman, and MV
Turbine Meters for connections).
All Smith Meter turbine meters with pickup coils are supplied with a 1-inch NPT pickup boss. The NMB’s
instrument housing may be directly mounted to the 1-inch NPT boss using a male/female (M/F) conduit
union.
3.1.3.1 Pulse Transmission
If long-distance pulse transmission is required to connect with other non-communicating ancillary
equipment, we recommend using the NMB with a Smith Meter PA-6 or PA-11 Preamplifier, which can be
purchased as accessories with an NMB. The pulse output from a preamplifier is used to send the meter
pulse signal to the NMB’s pulse input and to other pulse input ancillary devices in parallel.
If long-line pulse transmission is not required, a 5 volt, peak-to-peak, 1:1 pulse output is available.
This direct-mounting method only allows access to one pickup coil. If you require access to both pick-up
coils (such as for flow direction detection), remote mounting of the NMB is recommended so the signals
are derived directly from the individual preamplifiers.
Figure 3: NMB Housing Directly Mounted to Smith Meter G Series Turbine Meter

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Installation 11
3.1.4 Connecting to a PRIME 4 or Genesis PD Meter
The NMB is designed to easily connect with Smith Meter electronic PD meters, such as the PRIME 4 or
Genesis PD meter.
3.1.4.1 PRIME 4 Meter
The PRIME 4 meter is supplied with a male ¾-inch NPT sensor housing. You can directly mount the NMB
to the sensor housing boss using a M/F conduit union and a 1-inch to ¾-inch NPT reducer fitting. See
Figure 4: PRIME 4 Meter with NMB Instrument Housing for an example of connections from the PRIME 4
sensor to the NMB and Figure 10: Meter Pulse Inputs from a PRIME 4 PD Meter Pulser for an example of
electrical connections.
3.1.4.2 Genesis Meter
The Genesis meter is supplied with an integral housing with female ½-inch NPT conduit entrances. The
NMB’s instrument housing can be directly mounted to the Genesis meter’s housing using a M/F conduit
union and a 1-inch to ½-inch NPT reducer fitting. See Figure 5: Genesis Meter with NMB Enclosure for an
example of connections from the Genesis Hall Rotary Encoder (HRE) circuit board to the NMB and
Figure 11: Meter Pulse Inputs from a Genesis PD Meter’s HRE Board (Configured with an RTD) for an
example of electrical connections.
Figure 4: PRIME 4 Meter with NMB Instrument Housing

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Installation 12
3.2 Electrical Installation
3.2.1 Evaluation Standards Used
The following electrical standards were used in the evaluation of the NMB:
• General: IEC 60079-0 7th Edition, EN 60079-0:2018, UL 60079-0 7th Edition, CAN/CSA C22.2 No.
60079-0:2019
• Zone 1: IEC 60079-1 7th Edition, EN 60079-1:2014, UL 60079-1 7th Edition, CAN/CSA C22.2 No.
60079-1:2016
• Zone 2: IEC 60079-7 5th Edition, EN 60079-7:2015, UL 60079-7 5th Edition, CAN/CSA C22.2 No.
60079-7:2016
3.2.2 North American Installations
When installing in the United States, the NMB must be installed in accordance with the National Electrical
Code (NEC) NFPA 70 following the specific requirements for the zone or division area declared.
When installing in Canada, the NMB must be installed in accordance with the Canadian Electrical Code
CSA C22.1 following the specific requirements for the zone or division area declared.
3.2.3 ATEX and IECEx Zone 1 Installations
The following information is specific to NMB models purchased with an explosion-proof instrument housing
(with “XP” or “SS” in the model code) that will be installed in Zone 1 locations:
• Cable entries must be in accordance with IEC 60079-1 Section 13.
• For wiring systems using cable glands, the gland or thread adapter must be Ex d IIB IP66 certified. The
cable end must be securely installed and, depending on the cable type, must be properly protected
from mechanical damage.
Figure 5: Genesis Meter with NMB Enclosure

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Installation 13
• For wiring systems using conduit, an Ex d certified sealing device must be used immediately at the
entrance of the enclosure. Any unused entry must be suitably blocked with an Ex d IIB IP66 certified
plug for ATEX and IECEx applications. For North American zone applications, the plug must be listed
close up type.
• Wiring and cable glands must be suitable for 80 °C operation.
• Equipment bonding should be provided at the external grounding facility terminal; external connection
is not required when using metallic conduit or armored cable. The external grounding facility terminal
wire range is 10 to 12 AWG (4 mm2 minimum).
3.2.4 ATEX and IECEx Zone 2 Installations
Although NMB models purchased with an explosion-proof instrument housing (with “XP” or “SS” in the
model code) are certified for Zone 1, they also may be installed in a Zone 2 area using Zone 2 wiring
practices. The appropriate zone check box is required to be marked on the instrument housing’s name
plate to indicate which zone area wiring methods were used during the installation.
The following information is specific to NMB models purchased with an explosion-proof instrument housing
that will be installed in ATEX and IECEx Class I, Division 2, Zone 2 environments:
• The input power terminal block is rated for a wire size range of 14 to 28 AWG (0.2 mm2 to 1.5 mm2).
• The tightening torque is 0.2 to 0.25 N∙m (1.7 to 2.2 inch-pounds or 28 to 35 inch-ounces).
• The minimum wire temperature rating is 80 °C operation.
For NMB models that are panel mounted (with “PM” in the model code):
• The NMB should only be used in an area of not more than pollution degree 2, as defined in IEC/EN
60664-1.
• The NMB should be installed in an enclosure that provides a degree of protection not less than an IP54
rating in accordance with IEC/EN 60079-0 standards and only be accessible with the use of a tool.
For NMB models purchased with an instrument housing (with “XP” or “SS” in the model code):
• The area inside the instrument housing should maintain a pollution degree of 2, as defined in IEC/EN
60664-1.
• To minimize the risk of electrostatic charge, provisions should be made for adequate grounding and
equipment should be installed in such a manner that accidental discharge should not occur.
• Any cable glands, thread adapters, or sealing fittings used should be certified Ex e, at a minimum.
To prevent the ignition of hazardous atmospheres, disconnect from the power supply before
opening the instrument housing. Keep the housing tightly closed when circuits are alive.
The NMB contains an internal battery-powered circuit; to prevent the ignition of hazardous
atmospheres, do not open the housing unless the area is known to be non-hazardous.
To reduce the risk of ignition of hazardous atmospheres, conduit runs must have a sealing fitting
connected within 2 inches (50 mm) of the housing.

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Installation 14
3.2.5 Typical Wiring Diagrams
All of the terminals on the NMB are labeled to ease the process of landing the wiring connections. The
following figures provide details for connecting external devices to the NMB. Callouts on the left side of the
connector in each image are the NMB internals; callouts on the right of each connector represent external
wiring/devices.
Figure 6: Power and Digital Output Connections
Figure 7: Digital Input Connections

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Installation 15
Figure 8: Analog Input Wiring (Four-Wire Platinum
RTDs and Two 4-20 mA Inputs
Figure 9: Meter Pulse Inputs from a PA-6 Transmitter (NMB Models Only)