Emerson 781S Quick Start Guide

Quick Start Guide

00825-0700-4410, Rev AB

October 2020

Emerson Wireless 781S Smart Antenna

Quick Start Guide October 2020

Safety messages

NOTICE

This guide provides basic guidelines for the Emerson Wireless 781S Smart Antenna. It does not provide
instructions for diagnostics, maintenance, service, or troubleshooting. Refer to the Emerson Wireless

1410S Gateway and 781S Smart Antenna Reference Manual for more information and instructions. The

manuals and this guide are available electronically on Emerson.com/Rosemount. This device complies
with Part 15 of the FCC Rules. Operation is subject to the following conditions. This device may not
cause harmful interference. This device must accept any interference received, including interference
that may cause undesired operation. This device must be installed to ensure a minimum antenna
separation distance of 20 cm from all persons.

WARNING

Failure to follow these installation guidelines could result in death or serious injury.

Ensure only qualified personnel perform the installation.

Explosions could result in death or serious injury.

Installation of the transmitters in a hazardous environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Please review the
Product Certifications section for any restrictions associated with a safe installation.

Electrical shock could cause death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads can cause
electrical shock.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired
operation.

This device must be installed to ensure a minimum antenna separation distance of 8-in. (20 cm) from
all persons.

Physical access

Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end
users’ equipment. This could be intentional or unintentional and needs to be protected against.

Physical security is an important part of any security program and fundamental to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.

Contents

Wireless planning.........................................................................................................................5

Intended use................................................................................................................................ 7

Physical installation...................................................................................................................... 8

Best practices.............................................................................................................................10

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October 2020 Quick Start Guide

Verify operation......................................................................................................................... 11

Product certifications................................................................................................................. 12

Reference data........................................................................................................................... 23

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1 Wireless planning

1.1 Power up sequence

The Emerson Wireless Smart Antenna and wireless I/O should be installed
and functioning properly before the power modules are installed in any
wireless field devices. Wireless field devices should also be powered up in
order of proximity from the antenna beginning with the closest. This will
result in a simpler and faster network installation.

1.2 Antenna location

The antenna should be mounted in a location that allows convenient access
to the host system network (wireless I/O) as well as the wireless field device
network.

Figure 1-1: Antenna Mounting Location

A. Control room
B. RS-485 cable
C. Emerson Wireless 781S Smart Antenna

D. Mast or pipe

E. Infrastructure

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1.3 Antenna position

The Emerson 781S Smart Antennas should be positioned vertically and
approximately 3 ft. (1 m) from large structures, buildings, or conductive
surfaces to allow for clear communication to other devices. If installing
multiple antennas, it is important that the antennas have three feet of
horizontal separation from one another.

Figure 1-2: Antenna Position

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2 Intended use

2.1 System architecture

The smart antenna must be used in conjunction with a network manager or
network gateway. The smart antenna then functions as a translator between
the wired network and a wireless field network.

Figure 2-1: Example System Architecture

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3 Physical installation

3.1 Pipe mounting

Procedure

1. Insert U-bolt around 2-in. pipe or mast, through the saddle, through
the L-shaped bracket, and through the washer plate.

2. Use a ½-in. socket-head wrench to fasten the nuts to the U-bolt.

3. Secure the antenna to the L-shaped bracket with a 5/16-in. threaded
bolt.

4. Use a 5/16-in. wrench to tighten the screw into the housing.

Figure 3-1: Mounting

3.2 Power and data wiring

The Emerson 781S is completely prewired and only needs to be connected
and powered on the Gateway end. The housing is permanently sealed on the
Emerson 781S. In the Gateway:

Prerequisites

If operating with more than one antenna, it is important the antenna is
always connected to the antenna terminal connection 1 port.

Procedure

1. Connect the positive power lead to the “+” power terminal and the
negative power lead to the “–” terminal.

2. Connect the data + lead to the “A (+)” terminal and the data – lead to
the “B (–)” terminal.

3. Connect the grounding wire to the Gateway’s shield connection.

4. If connecting multiple antennas, repeat this process for terminal
connection 2.

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Figure 3-2: Wiring Guide

A. Power
B. Data

Red - positive

Blk - negative

Wht - RS-485 comm A

Blu - RS-485 comm B

Figure 3-3: Emerson Wireless 781S

A. Power output
B. RS-485 comm

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4 Best practices

Twisted shielded pair cable is generally used to wire the serial connection to
the Gateway. The Smart Antenna should be installed in a central location of
the wireless field network so that it has the most direct connections to
wireless devices as possible.

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5 Verify operation

5.1 Emerson 781S Smart Antenna

The antenna has no exterior lights or LCD displays. Therefore, once it is
powered up through the Gateway, its operation must be verified through
the Gateway end of the connection.

5.2 Power up sequence

The second and third LED’s in the Emerson 1410S correlate to the first and
second terminal connections. These lights should be green when the
antenna is connected properly.

5.3 Normal operation

The operation of the WirelessHART® Smart Antenna can be assessed within
the Gateway user interface. The connection can be seen by allowing the link
to be seen as a field device. The operability can be verified by attempting to
connect to a device.

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6 Product certifications

Rev 1.3

6.1 European Directive Information

A copy of the EU Declaration of Conformity can be found at the end of the
Quick Start Guide. The most recent revision of the EU Declaration of
Conformity can be found at Emerson.com.

6.2 Telecommunications compliance

All wireless devices require certification to ensure they adhere to regulations
regarding the use of the RF spectrum. Nearly every country requires this type
of product certification.

Emerson is working with governmental agencies around the world to supply
fully compliant products and remove the risk of violating country directives
or laws governing wireless device usage.

6.3 FCC and IC

This device complies with Part 15 of the FCC Rules. Operation is subject to
the following conditions: This device may not cause harmful interference;
this device must accept any interference received, including interference
that may cause undesired operation. This device must be installed to ensure
a minimum antenna separation distance of 20 cm from all persons.

This device complies with Industry Canada license-exempt RSS-247.
Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.

Changes or modification to the equipment not expressly approved by
Rosemount, Inc. could void the user's authority to operate the equipment.

Cet appareil est conforme à la Partie 15 de la réglementation FCC. Son
fonctionnement est soumis aux conditions suivantes: Cet appareil ne doit
pas causer d'interférences nuisibles. Cet appareil doit accepter toute
interférence reçue, incluant toute interférence pouvant causer un
fonctionnement indésirable. Cet appareil doit être installé pour assurer une
distance minimum de l'antenne de séparation de 20 cm de toute personne.

Cet appareil est conforme à la norme RSS-247 Industrie Canada exempt de
licence. Son fonctionnement est soumis aux deux conditions suivantes: (1)
cet appareil ne doit pas provoquer d'interférences et (2) cet appareil doit
accepter toute interférence, y compris les interférences pouvant causer un
mauvais fonctionnement du dispositif.

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Les changements ou les modifications apportés à l'équipement qui n'est pas
expressément approuvé par Rosemount, Inc. pourraient annuler l'autorité
de l'utilisateur à utiliser cet équipement.

6.4 Ordinary location certification

As standard, the device has been examined and tested to determine that the
design meets the basic electrical, mechanical, and fire protection
requirements by a nationally recognized test laboratory (NRTL) as accredited
by the Federal Occupational Safety and Health Administration (OSHA).

6.5 Installing equipment in North America

The US National Electrical Code® (NEC) and the Canadian Electrical Code
(CEC) permit the use of Division marked equipment in Zones and Zone
marked equipment in Divisions. The markings must be suitable for the area
classification, gas, and temperature class. This information is clearly defined
in the respective codes.

6.6 USA

I5 USA Intrinsic Safety

6.7

Certificate

Markings

Standards

Warnings/Conditions of Acceptability

1. Potential electrostatic charging hazard: See instructions.

2. Installed as per Control drawing 01410-1300 for hazardous and non-

3. When NOT installed with the 1410S (CSA Certificate #80009647),

80011697

Class I, Division 1, 2, Groups A, B, C, D T4 (-40 °C ≤ Ta ≤ +70
°C); Class I Zone 0, AEx ia IIC T4; Class I Zone 2, AEx ic IIC T4

FM 3600:2011, FM 3610:2018, FM 3611:2018, ANSI/UL
60079-0:2019, ANSI/UL 60079-11:2014

hazardous areas.

the associated apparatus is required to have a minimum of 114R(Ro)
output resistance for RS-485/power connections.

Canada

I1 Canada Intrinsic Safety

Certificate

Markings

80011697

Class I, Division 1, 2, Groups A, B, C, D T4 (-40 °C ≤ Ta ≤ +70
°C); Ex ia IIC T4; Ex ic IIC T4

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Standards

Warnings

1. Potential electrostatic charging hazard - see instructions.

2. Installed as per Control drawing 01410-1300 for hazardous and non-

3. When NOT installed with the 1410S (CSA Certificate 80009647), the

6.8 Europe

I1 ATEX Intrinsic Safety

Certificate

Markings

Standards

Special Conditions for Safe Use (X):

1. The plastic enclosure may constitute a potential electrostatic ignition

CAN/CSA C22.2 No 60079-0:2019, CAN/CSA C22.2 No.
60079-11:2014, CSA C22.2 No.213 – 2017

Avertissement - risque d'explosion: Ne pas débrancher pendant que
le circuit est sous tension.

hazardous areas.

associated apparatus is required to have a minimum of 114R(Ro)
output resistance for RS-485/power connections.

SGS20ATEX0038X

Ex ia IIC T4 Ga (-40 °C ≤ Ta ≤ +70 °C)

EN IEC 60079-0: 2018, EN 60079-11: 2012

risk and must not be rubbed or cleaned with a dry cloth.

2. The equipment is not capable of withstanding the 500 V electrical
strength test as defined in clause 6.1.13 or EN 60079-11:2012. This
must be taken into account during installation.

3. The measured capacitance between the equipment enclosure and
metallic conduit adapter is 21pF. This must be considered only when
the Model 781S is integrated into a system where the process
connection is not grounded.

ATEX Intrinsic Safety

Certificate

Markings

Standards

Special Conditions for Safe Use (X):

1. The plastic enclosure may constitute a potential electrostatic ignition
risk and must not be rubbed or cleaned with a dry cloth.

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SGSATEX0053X

Ex ic IIC T4 Gc (-40 °C ≤ Ta ≤ +70 °C)

EN IEC 60079-0: 2018, EN 60079-11: 2012

October 2020 Quick Start Guide

2. The equipment is not capable of withstanding the 500 V electrical
strength test as defined in clause 6.3.13 of EN 60079-11:2012. This
must be taken into account during installation.

3. The measured capacitance between the equipment enclosure and
metallic conduit adapter is 21pF. This must be considered only when
the Model 781S is integrated into a system where the process
connection is not grounded.

6.9 International

I7 IECEx Intrinsic Safety

Certificate

Markings

Standards

Special Conditions for Safe Use (X):

1. The plastic enclosure may constitute a potential electrostatic ignition

2. The equipment is not capable of withstanding the 500 V dielectric

3. The measured capacitance between the equipment enclosure and

IECEx BAS.20.0021X

Ex ia IIC T4 Ga (–40 °C ≤ Ta ≤ +70 °C), Ex ic IIC T4 Gc (–40 °C ≤
Ta ≤ +70 °C)

IEC 60079-0: 2017, IEC 60079-11: 2011

risk and must not be rubbed or cleaned with a dry cloth.

strength test as defined in clause 6.3.13 of IEC 60079-11: 2011. This
must be taken into account during installation.

metallic conduit adapter is 21pF. This must be considered only when
the Model 781S is integrated into a system where the process
connection is not grounded.

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6.10 Declaration of Conformity

Emerson Wireless 781SA Smart Antenna

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6.11 Declaration of Conformity

Emerson Wireless 781SC Smart Antenna

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Quick Start Guide 21

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6.12 China RoHS table

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7 Reference data

For information on product specs, dimensional drawings, ordering
information or the complete reference manual, see Emerson.com.

Figure 7-1: Hazardous Location Installation

Option N:
Ex

No intrinsically safe
(IS) outputs, for
installation in safe
areas only

Option B
Ex [ic]

IS output for 781
installation in Zone
2/Cl1 Div 2

Option A:
Ex ex ec [ia]

IS output for 781
installation in Zone 0,
1+2 / Cl1 Div 1+2
(31ES-781S in Zone 1
or 2)

Option N:
External IS outputs
(24 Vdc and RS-485)
for installation of
1410S in safe areas
only: 781S may be
installed in Zone 2, 1,
or 0 (Cl1 Div 2/1)

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*00825-0700-4410*

00825-0700-4410, Rev. AB

Quick Start Guide

October 2020

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