Endress+Hauser NXA20 Specifications

TI01175G/00/EN/02.15
71310502

Products Solutions Services

Technical Information

Tankvision Gauge Link NXA20

Inventory Management System with completely
integrated software for operation via standard web
browser

Application

Tankvision is a dedicated tank inventory system which is operated by a standard web
browser and does not require proprietary software or licensing costs.
Tankvision is based on a distributed architecture on a Local Area Network (LAN). Due
to its modular structure it can be adjusted to any application. It is ideally suited for
small tank farms with only a couple of tanks, but also for large refineries with hundreds
of tanks.
Tankvision consists of the following components:

• Tankvision Tank Scanner NXA820
scans parameters from tank gauges and
performs tank calculations (option)

• Tankvision Data Concentrator NXA821
summarizes data from various Tank Scanners NXA820

• Tankvision Host Link NXA822
provides data to host systems (such as PLC or DCS) via Modbus

• Tankvision Gauge Link NXA20
connects the Tank Scanner with tank gauges/sensors with Enraf BPM or Emerson
TRL/2 interfaces

Your benefits

•License-free

• Approved for custody transfer applications according to NMI, PTB and others

• Global system engineering and service support

• A robust industrial operating system with embedded software ensures high stability
and availability.

• Modular design; easily adjustable to any application; can be upgraded as required

• Configuration, commissioning and operation via web browser; no proprietary
software required

• Access for up to 10 users per Tankvision component from any connected PC

• Common hardware platform for all components; no hard disc or fans to wear out

• Volume calculations and correction included according to international standards
(API/ASTM/IP tables) in Tank Scanner NXA820 (optional)

• Predefined or customized operator screens for typical operation of a tank farm
(optional)

• Includes OPC Data Access server (3.0) for Windows PC

Table of Contents

Tankvision NXA20

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Inventory control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Application areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Function and system design . . . . . . . . . . . . . . . . . . . . . .4

System design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Typical system configuration . . . . . . . . . . . . . . . . . . . . .6

Wiring example for NXA820/821/822/20 . . . . . . . . . . . . . . . . 6

Function of the components . . . . . . . . . . . . . . . . . . . . . .6

Gauge Link NXA20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Power supply NXA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

RS-232 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fieldbus protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Mounting location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 7

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Description of Instrument Functions . . . . . . . . . . . . . . . . . . . . 10

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . . . 10

Modbus® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Microsoft®, Windows® and Internet Explorer® . . . . . . . . . . . 10

Java® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Mozilla® Firefox® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Enraf, Honeywell, Rosemount, Emerson, Saab, L&J, VAREC,

GPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Mechanical construction . . . . . . . . . . . . . . . . . . . . . . . . .8

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation considerations . . . . . . . . . . . . . . . . . . . . . . .8

System requirements

of user PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Shielding and Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Languages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Certificates and approvals . . . . . . . . . . . . . . . . . . . . . . 10

Metrological approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Supplementary documentation. . . . . . . . . . . . . . . . . . 10

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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Tankvision NXA20

Applications

Inventory control By using Tankvision to monitor the tank level and stored volume of valuable liquids remotely, owners

or operators of tank farms or terminals for petroleum products and chemicals (liquids) can visualize
the volume of the stored medium in real time. The data can be used to plan the inventory and
distribution. The data can also be used to manage tank farm operations like pumping or transferring
products.
Tankvision has its unique concept using network technology. Without using proprietary software, the
users can visualize and manage their valuable liquids stored in the tanks by a web browser.
Tankvision is a flexible and cost effective solution due to its scalable architecture. The application
coverage goes from small depots with only a few tanks up to refineries.

Choosing the "Interface only" option in Tank Scanner it becomes a fit-for-purpose interface unit to the
tank gauges for Tankvision Professional.

With the Gauge Link the Tank Scanner becomes a fit-for-purpose interface unit to the tank gauges
with Enraf BPM and Emerson TRL/2 Protocols.

Application areas • tank farms in refineries

• ship loading terminals

• marketing and distribution terminals

• pipeline terminals

• logistic terminals for tanks storing products like crude oils, refined white and black products,
chemicals, LPGs, fuels, biofuels, alcohols

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Function and system design

System design Tank management visualization without proprietary software

Tankvision is the first tank management visualization system providing its functionality without the
need to have proprietary software installed and maintained on a PC. The main functionality is realized
by embedded web pages in the Tankvision components. Tankvision uses an industrial proven operating
system and provides high availability. Tankvision is not based on a PC platform and runs independent
of connected PCs. This eliminates the need to maintain a specialized PC with a Windows operating
system and necessary updates and hot fixes. Tankvision web pages can be accessed from a standard PC
with a web browser. Multiple users with different roles can simultaneously log in to each Tankvision
component. Additional users can be added as required. There are no multi-user licence fees.
Please check with Endress+Hauser for recommendations on PC, operating system and web browser.

Tank management visualization for tank gauges/sensors with Emerson TRL/2 or Enraf BPM field protocols

Tankvision Tank Scanner is designed to interface with Modbus, Sakura V1 or Whessoe 550 field
protocols. This functionality is expanded by the Gauge Link for the Enraf BPM and the Emerson TRL/
2 field protocols.

Distributed architecture and scalability

Tankvision is based on a distributed architecture on a Local Area Network (LAN). Coordinated
components perform all inventory management tasks. The modular design makes it easy to enlarge
the system whenever required and to add further tank areas.
Thus, Tankvision is fully scalable and is ideally suited for applications of any size - from small tank
farms to large refineries.

Tankvision NXA20

Common hardware platform

The Tankvision components have dedicated tasks in a system, but have a common architecture, based
on a 32 Bit processor. The embedded tank management software uses a multi-threaded real time
operating system (RTOS), specifically designed for industrial applications. The hardware is designed
without wear-out components like hard discs or fans. This guarantees high reliability.

System configuration Configuration of the Tank Scanner

Each Tankvision component has its own data base and a web server. The components are connected
and exchange data with time stamp and status information. Data is optionally encrypted and secured
by a CRC checksum.
The Tankvision components are configured with static IP addresses, which are reserved on a DHCP
network.
The configuration pages are embedded in the Tankvision components and allow configuration of
Tankvision via a connected web browser without configuration software. No Internet access is
necessary, as all pages are loaded from the Tankvision system itself.

Configuration of the connected Gauge Link to the Tank Scanner

Bus termination and biasing are controlled by software selectable settings in the Tankvision Gauge
Link. By default, these are enabled for point-to-point links or the devices in a multidrop network that
are at the outer "ends" of the cable. If the Tankvision Gauge Link is part of a multi-drop network and is
not the "end" device on the cable, the termination and biasing may be disabled.

Configuration of the connected tank gauges/sensors to the Gauge Link

The diagnostic / service port generally remains unconnected during normal operation of the
Tankvision Gauge Link. The port has a 9 way "D" type socket connector. A suitable cable with mating
plug will be required for local connection of a service laptop PC or similar. A "standard" serial port, a 9­way fully wired plug – socket cable will be required. The cable should be wired pin-to-pin, i.e. 1-1, 2­2, 3-3, … 9-9. Proprietary cables will generally have all pins wired, though only pins 2, 3, 4, 5 and 7
are actually used. Cable length should not exceed 2 metres (6.6 ft).

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Tankvision NXA20

Features • Interfacing Honeywell Enraf BPM or Emerson TRL/2 field protocols.

• Asset management with the Honeywell Enraf or Emerson Saab gauge tools.

Security IT security

We only provide a warranty if the device is installed and used as described in the Operating
Instructions. The device is equipped with security mechanisms to protect it against any inadvertent
changes to the device settings.

IT security measures in line with operators' security standards and designed to provide additional
protection for the device and device data transfer must be implemented by the operators themselves.

Endress+Hauser 5

Wiring example for NXA820/

NXA820 NXA820

NXA822

NXA820

1

7

3

4

5

6

2

89

7

10

11

12

12

10

13

14

14

821/822/20

Tankvision NXA20

Typical system configuration

NXA20_Wiring_example

1 DCS/PLC (Distributed control system/Programmable logic controlled)
2Modbus
3 Host Link NXA822
4 Data Concentrator NXA821
5 Switch
6 Operator with Browser/SupplyCare Enterprise (Server)
7 Tank Scanner NXA820
8 Fieldbus protocol
9 Modbus protocol
10 Gauge Link NXA20
11 ENRAF BPM protocol
12 Tank gauges/sensors with Enraf BPM interface
13 Emerson TRL/2 protocol
14 Tank gauges/sensors with Emerson TRL/2 interface

Function of the components

Gauge Link NXA20 • The Gauge Link NXA20 connects multiple tank gauges from up to 32 tanks (max. 15 when used in

combination with NXA820) via one field-loop. The Gauge Link NXA20 supports different field
protocols (Enraf BPM, Emerson TRL/2).

• The measured values are transmitted by the Modbus network to the Tank Scanner NXA820 which
will provide visualization on HTML pages.

• The Gauge Link NXA20 has to be used in combination with the Tank Scanner NXA820 to provide
visualization.

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Tankvision NXA20

Inputs and Outputs

Power supply NXA

Galvanic isolation The following terminals are galvanically isolated from each other:

RS-232 connections

Fieldbus protocols The Gauge Link NXA20 is available with the following field protocols:

Property Specification

Supply voltage 90 - 250 VAC (50/60Hz)

Power consumption max. 23 VA

Current consumption max. 100 mA at 230 VAC

Fuse T 400 mA HBC 250V AC, 20 x 5 mm (0.79 x 0.2 in)

• Fieldbus interface (Enraf BPM or Emerson TRL/2 interface)

• Enraf BPM, max. 32 gauges (max. 15 when used in combination with NXA820)

• Emerson TRL/2, max. 32 gauges (max. 15 when used in combination with NXA820)

Environment

Mounting location Cabinet or protective housing

Ambient temperature –40 to +60 °C (–40 to +140 °F)

Storage temperature –40 to +85 °C (–40 to +185 °F)

Relative humidity max. 90 % at +25 °C (non-condensing)

Ingress protection IP20

Electromagnetic compatibility (EMC)

Installation Tankvision Gauge Link NXA20 is designed to be installed in a cabinet, using a standard 35 mm DIN

EMC according to the requirements of the EN 61326-series and the NAMUR-recommendation EMC
(NE21). Details can be found in the Declaration of Conformity.

(top-hat) rail conforming to EN50022 (BS5584) (IEC 60715).

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Dimensions

43 (1.7)

35 (1.4)

104 (4.1)

91 (3.6)

140 (5.5)

mm (in)

Tankvision NXA20

Mechanical construction

GaugeLink_Dimensions

Dimensions in mm (inch)

Materials Housing

Polycarbonate
Colour: light grey

Front cover

Polyamide PA6
Colour: grey

Installation considerations

It is recommended to take the information contained in the Operating Instructions into
consideration when designing the system architecture (→ ä 10).

System requirements of user PC

Shielding and Grounding When planning the shielding and grounding for a fieldbus system, there are three important points to

Check the latest information on hardware and software requirements.
Please contact your local Endress+Hauser Sales Center.

consider:

• Electromagnetic compatibility (EMC)

• Explosion protection

•Safety of the personnel

To ensure the optimum electromagnetic compatibility of systems, it is important that the system
components and above all cables, which connect the components, are shielded and that no portion of
the system is unshielded. Ideally, the cable shields are connected to the normally metal housings of the
connected field devices. Since these are generally connected to the protective earth, the shield of the
bus cable is grounded many times. Keep the stripped and twisted lengths of cable shield to the
terminals as short as possible.
This approach, which provides the best electromagnetic compatibility and personnel safety, can be
used without restriction in systems with good potential equalization.

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Tankvision NXA20

NOTICE

In the case of systems without potential equalization, a power supply frequency (50/60 Hz) equalizing
current can flow between two grounding points which, in unfavourable cases, e.g. when it exceeds the
permissible shield current, may destroy the cable.
To suppress the low frequency equalizing currents on systems without potential equalization, it is
therefore recommended to connect the cable shield directly to the building ground (or protective earth)
at one end only and to use capacitive coupling to connect all other grounding points.

The NXA20 provides two grounding points for the shield, close to the fieldbus interface connector:

• The “)” terminal, which should already be connected directly to ground

• The “S” terminal (13), which provides capacitive connection to the “)” terminal

EMC requirements
The legal EMC requirements are fulfilled only when

‣ the cable shield is grounded on both sides!

Ordering information

Ordering information Detailed ordering information is available from the following sources:

• In the Product Configurator on the Endress+Hauser website: www.endress.com → Select country →
Instruments → Select device → Product page function: Configure this product

• From your Endress+Hauser Sales Center: www.endress.com/worldwide

Product Configurator - the tool for individual product configuration

•Up-to-the-minute configuration data

•Depending on the device: Direct input of measuring point-specific information such as
measuring range or operating language

•Automatic verification of exclusion criteria

•Automatic creation of the order code and its breakdown in PDF or Excel output format

•Ability to order directly in the Endress+Hauser Online Shop

Endress+Hauser 9

Human interface

Operating concept Tankvision is operated by a standard web browser (e.g. Microsoft Internet Explorer).

The Tankvision components contain predefined operating pages. If required, they can be adjusted by
the user.

Languages The operating pages are available in the following languages:

• English

Check with Endress+Hauser for the latest information on available languages.

Certificates and approvals

Metrological approvals In preparation

Supplementary documentation

Tankvision NXA20

Operating Instructions BA01335G

Operating Instructions for NXA20
Describes installation, electrical connection and first setup.

Operating Instructions BA01334G

Operating Instructions for NXA20
Describes the Modbus Map Protocol.

Operating Instructions BA00340G

Operating Instructions for NXA820, NXA821 and NXA822
Describes installation, electrical connection and first setup.

Description of Instrument Functions

Operating Instructions BA01137G

BA00339G

Description of Instrument Functions for Tank Scanner NXA820, Data Concentrator NXA821 and Host
Link NXA822.
Contains a detailed description of all instrument functions.

Operating Instructions for Tankvision NXA820 OPC Server.
Describes installation, configuration and usage.

Registered trademarks

®

®

®

Firefox

Modbus® is a registered trademark of the MODBUS-IDA, Hopkinton, MA, USA.

®

®

Microsoft®, Windows®, Internet Explorer® and the Microsoft logo are registered trademarks of the
Microsoft Corporation.

Java® is a registered trademark of Sun Microsystems, Inc.

Registered trademark of the Mozilla Foundation

Modbus

Microsoft®, Windows® and
Internet Explorer

Java

Mozilla

10 Endress+Hauser

Tankvision NXA20

Enraf, Honeywell, Rosemount, Emerson, Saab, L&J, VAREC, GPE

Others All other marks are property of their respective owners.

Enraf, Honeywell, Rosemount, Emerson, Saab, L&J, VAREC, GPE are registered trademarks and
trademarks of these organizations and companies.

Endress+Hauser 11

www.addresses.endress.com

71310502