Eaton Crouse-hinds series User manual

9387-FB-Px-R
5-spur, Open Frame,
Redundant Fieldbus Barrier
November 2016
INM 9380-RD Rev 2
Instruction manual
MTL fieldbus networks

ii
INM9380-RD Rev 2
DECLARATION OF CONFORMITY
A printed version of the Declaration of Conformity has been provided separately within the original shipment of
goods. However, you can find a copy of the latest version at http://www.mtl-inst.com/certificates

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INM9380-RD Rev 2
CONTENTS
DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
GENERAL SAFETY INFORMATION . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
1 OVERVIEW ........................................................................1
2 DESCRIPTION ......................................................................2
2.1 General ................................................................................2
2.2 Configuration options ....................................................................2
2.3 Trunk Terminal Assembly ..................................................................3
3 MECHANICAL INSTALLATION.........................................................3
3.1 Mounting overview ......................................................................3
3.2 Preparation .............................................................................4
3.3 Mounting the assembly in a suitable enclosure ...............................................4
4 INITIAL ELECTRICAL INSTALLATION ...................................................5
4.1 Overview ...............................................................................5
4.2 Grounding ..............................................................................5
4.3 Trunk connections .......................................................................8
4.4 Trunk Terminator module 9378-FT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.5 Trunk Surge module 9376-SP .............................................................10
4.6 Spur connections .......................................................................10
4.7 Final checks............................................................................11
5 MAINTENANCE ...................................................................12
5.1 General ...............................................................................12
5.2 Fieldbus Barrier maintenance procedures ...................................................12
5.3 Spur connections .......................................................................15
5.4 Trunk connections ......................................................................16
5.5 Regular Maintenance checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6 TROUBLESHOOTING ...............................................................17
7 ALARM MODULE - OPERATION & CONFIGURATION .....................................18
7.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7.2 Device details ..........................................................................18
7.3 Alarm module fitting or replacement.......................................................19
8 ATEX INFORMATION ...............................................................21
8.1 General ...............................................................................21
8.2 Installation ............................................................................21
8.3 Inspection and maintenance .............................................................22
8.4 Repair ................................................................................22
8.5 Marking ...............................................................................22
9 APPENDIX 1 - ENCLOSURE WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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INM9380-RD Rev 2
GENERAL SAFETY INFORMATION
Safety instructions for installation and operating personnel
The operating instructions provided here contain essential safety instructions for installation personnel and those
engaged in the operation, maintenance and servicing of the equipment.
WARNING!
Failure to comply with these instructions can endanger the lives or health of
personnel and risk damage to the plant and the environment.
WARNING!
The responsibility for planning, installation, commissioning, operation and
maintenance, particularly with respect to applications in explosion-hazard areas,
lies with the plant operator.
Before commencing installation or commissioning:
• Read and understand the contents of this manual
• Ensure installation and operating personnel have received adequate training for this task
• Ensure that any operating instructions are fully understood by the personnel responsible.
• Observe national and local installation and mounting regulations (e.g. IEC 60079-14).
WARNING!
These assemblies may not be used in explosion-hazard area applications if they
have been used previously in general electrical installations.
During operation:
• Make the relevant instructions available at all times to the operating personnel.
• Observe safety instructions.
• Observe national safety and accident prevention regulations.
• Operate the equipment within its published specification.
• Servicing, maintenance work or repairs not described in this manual must not be performed without prior
agreement with the manufacturer.
• Any damage to this equipment may render its explosion protection null and void.
• No changes to any of the components that might impair their explosion protection are permitted.
If any information provided here is not clear:
• Contact Eaton’s MTL product line or one of its representatives.
Note: Improper installation and operation of the enclosure can result in the invalidation of the guarantee.

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INM9380-RD Rev 2
1 OVERVIEW
This manual explains the installation and maintenance procedures for the
9387-FB-Px-R Open-Frame Redundant Fieldbus Barrier and must be read in association
with the product datasheet that contains the electrical data.
The 9387-FB-Px-R assembly is a wiring hub that creates five* intrinsically safe spur
connections from a high-energy trunk, for connection to suitably certified Foundation™
fieldbus H1 instruments. The assembly is bus-powered and requires no additional
power supply in the field.
When installed and certified inside a suitable Ex enclosure (see Section 3.1 on page 3),
an assembly may be installed in a Zone 1 or a Zone 2 hazardous area.
Each assembly uses a pair of Fieldbus Barrier modules in a “redundant spur“
configuration in order to achieve significantly higher system availability than
equivalent ‘simplex’ units. The 9387-FB-Px-R may therefore be selected for critical
process applications where failure of the Fieldbus Barrier would otherwise result in
unacceptable downtime or lost production. It is also ideal for use in fieldbus Safety
Instrumented Function (SIF) networks in which nuisance trips cannot be tolerated.
Failure annunciation to the host control system is provided by means of an integrated
Foundation™ fieldbus device with Digital Input Function Block capability.
The baseplate on which the carrier and trunk terminal assembly is mounted is 316
stainless steel for protection against corrosion.
The following types are available by ordering the appropriate model number.
9387-FB-Px-R Redundant Fieldbus Barrier assembly, 5-spur
Where Px = PS (pluggable screw terminal connectors) or
PC (pluggable spring clamp connectors)
* See section 2.2
9387-FB-Px-R 5-Spur Open-Frame
Redundant Fieldbus Barrier
Figure 1.1 - Example of model 9387-FB-Px-R

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INM9380-RD Rev 2
2 DESCRIPTION
2.1 General
The assembly consists of a stainless steel baseplate, together with a trunk-wiring
terminal assembly (TTA), two carrier-mounted fieldbus barriers and a fieldbus alarm
module. Each barrier module can convert a single, non-intrinsically safe fieldbus trunk
into six, galvanically isolated, intrinsically safe (IS) spur connections for connection to
Foundation™ fieldbus H1 fieldbus instruments. However, only six spurs are available at
any one time because they are configured as “redundant pairs”. On power-up the spurs
in one barrier are configured to be in “active” mode, while the spurs in the other barrier
remain in “standby”. In the event of a spur circuit failure in the “active” barrier module,
an automatic switchover ensures that the external spur field circuit continues to be
supported by the corresponding spur in the “standby” module.
Figure 2.1 illustrates an example where Module A- on the left- is the active barrier and
Module B the standby. Spurs 1,2, 4, 5 and 6 of Module A are shown as active (‘A’) but
spur 3 has failed (and effectively gone into standby) so module B has automatically
taken control of spur 3 (‘A’) to maintain full service to the affected field circuit.
++++++

Spur Electronics Spur Electronics
= Active
S= Standby
0V 0V







     

SS SSS
AlarmAlarm
S



Figure 2.1 - Redundant spurs block diagram + optional alarm module
The spurs are galvanically isolated from the trunk allowing the user to choose the type
of grounding scheme most suitable to their system.
Spur short-circuit protection is provided by the barrier and surge protection can also
be added on individual outgoing spurs by the use of individual Spur Surge protection
modules (part no. FS32).
The baseplates are supplied pre–drilled for mounting on any surface capable of
supporting the assemblies.
2.2 Configuration options
There are six spur outputs from each barrier and, as described above, these can
operate in a redundant fashion, supporting each other to maintain continuous
availability. However, if a spur “fails-over” to the other barrier, the situation might
go undetected without frequent inspection of the status of the barrier LEDs.
For this reason, a “failure-reporting” configuration is provided, where Spur 6 is
assigned to an internally located Alarm Module (model 9379-ALM) - see Figure 2.1.

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INM9380-RD Rev 2
Consequently, if a spur ‘fail-over’ occurs, an alarm is signalled quickly to the host, via
the fieldbus connection, to facilitate any necessary remedial action. The five remaining
spurs are available to the user for connection to field devices.
2.3 Trunk Terminal Assembly
The incoming trunk wiring is terminated inside a separate compartment, called the
Trunk Terminal Assembly (TTA), that contains increased safety (Ex e) trunk wiring
terminals. This compartment has a protective cover to deter interference, and carries
a warning to the user about working on trunk wiring without first isolating the power.
A fieldbus Terminator module (part no. 9378-FT) is supplied pre-fitted on the TTA. This is
to remain installed if the assembly is at the end of the segment. If the incoming fieldbus
trunk will be onward linked to a further node on the segment the terminator can be
removed. See Section 4.4 on page 10 for additional information.
An optionalTrunk Surge module (part no. 9376-SP) can be plugged into theTTA to protect the
fieldbus barrier against damaging voltage and current surges on the incoming trunk wiring.
The 9387-FB-Px-R Fieldbus Barriers are bus-powered and require no additional power
supply in the field. When used with a fieldbus host control system, power for the trunk
MUST be provided only by a supply conforming to IEC 61158-2, e.g. MTL-Relcom F800
or 918x range of redundant power supplies.
3 MECHANICAL INSTALLATION
See Figure 3.1 for the dimensions, fixing locations and cable gland positions.
!
ABB AxxxxxxxPxxxxx Gxxxxx
Mxxxxx xxxxxxxxxxxxxx
TTH300
TRUNK
IN
TRUNK
OUT
ABB
AB
230.0
385.0
355.0
240.0 260.0
266.0
410.0
99.3
Mounting slot size 14 x 6
Figure 3.1 - Dimensions and mounting hole positions for the assembly (9387-FB-Px-R)
3.1 Mounting overview
Before mounting an assembly, consider the following points.
a) When planning the layout of any protective enclosure for an assembly, ensure that
adequate space is provided for suitable cable management (e.g. trunking).
b) The permitted ambient temperature range for the assembly (–40°C to +75°C) must
not be exceeded. Avoid radiant heat by positioning an assembly and its enclosure
away from direct sunlight or local sources of heat.

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INM9380-RD Rev 2
c) An assembly has limited ingress protection and must be provided with protection
appropriate to the environment in which it is located.The following table provides
guidance on minimum environmental protection for specific locations.
Location Minimum environmental protection
Safe area IP20
Zone 1 or
Zone 2
Ex e or Ex d certified enclosure; ≥IP54 - increase level for more
severe conditions
Note: For installation in Zone 1 or 2, the combination of a 9387-FB-Px-R open frame
assembly and its protective Ex e or Ex d enclosure will require certification as a
complete assembly by a third-party certifying authority.
d) An assembly will provide the best thermal performance when mounted on a
vertical surface. Other orientations are possible but may require some de-rating of
the permitted operating temperature range.
e) Adequate security should be provided against unauthorised interference with the
equipment.
f) If the chosen protective enclosure is liable to encounter significant levels of
condensation, it is advisable to incorporate a drain/breather to minimise moisture
accumulation.
3.2 Preparation
NOTE: The weight of an assembly must be considered when chosing a suitable
mounting location. Use the following figures for guidance.
Assembly/Component Guide weight (kg)
Baseplate, carriers and TTA (no modules) 2.8
Fieldbus barrier module 9377-FB-R 0.95
Alarm module 9379-ALM (including connectors) 0.07
Trunk terminator module (max. 1 per assembly) 0.12
Trunk surge suppressor module (max. 1 per assembly) 0.16
Spur surge suppressor module (max. 1 per spur) 0.04
a) Remove any temporary protection or packing materials.
b) The assembly can be mounted on any suitable structure via the mounting holes in
the corners- see Figure 3.1 for details.
c) All fixings must be suitable for the mounting surface and the environmental
conditions that are likely to be encountered.
3.3 Mounting the assembly in a suitable enclosure
WARNING!
To minimise the risk of ignition by electrical apparatus in hazardous
areas, efficient installation, inspection and maintenance of apparatus
and systems is essential, and the work should be carried out by suitably
trained personnel in accordance with the prevailing code of practice.
The certification documents specify “Conditions for safe use” that
must be adhered to and the copy certificate supplied should be
studied and understood. Additionally it is recommend that a working
knowledge of IEC EN 60079 -14 be attained, as this standard provides
guidance in respect to the installation of electrical equipment in
hazardous areas.
3.3.1 Fixing the assembly
Either define hole or stud positions based upon the dimensions given in Figures 3.1,
or use the baseplate as a template. Prepare the fixings being used, then attach the
assembly.

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INM9380-RD Rev 2
After mounting the assembly check that:
• none of the component parts have suffered any damage,
• the baseplate of the assembly is not distorted
• the mounting bolts/nuts are all tightened as recommended above.
4 INITIAL ELECTRICAL INSTALLATION
WARNING!
Before starting any electrical installation work, ensure that the
incoming trunk connection is isolated from any source of power.
CAUTION
Assembly temperatures could rise to 75°C. Ensure that all cables and cable glands
fitted are rated to withstand these temperatures.
4.1 Overview
• The assembly receives power from the incoming trunk cable and requires no
further source of power.
• It shall only be powered from supplies conforming to IEC 61158.
• The environment/enclosure in which an assembly is mounted must ensure
adequate separation of the trunk and spur wiring. This may be provided by
means of separate cable trunking or clear physical separation as defined by local
rules. Blue cable trunking is recommended for the IS spur cables to identify that
they are intrinsically safe circuits, while grey or black trunking is recommended for
the non-IS trunk cables. The cable routing should ensure that trunk and spur cables
do not cross each other inside the enclosure.
• Type ‘A’ fieldbus cable is recommended for fieldbus trunk connections.
• The TTA can accommodate trunk cables with outer diameters between
approximately 5 and 13mm - see Section 4.3.1 for further details regarding
protection rating.
• The terminal blocks for the trunk fieldbus cables have either screw terminal
connectors or cage clamp connectors according to the model specified, but both
are suitable for cables from 0.5mm2/AWG 20 up to 2.5mm2/AWG 14.
For details of the wiring for the two system types see Appendix 1.
4.2 Grounding
Two distinct ground concepts should be recognised before wiring of the assembly
begins:
a) Protective local ground- mandatory
b) Cable shield ground
These two concepts and their implementation are explained below.
4.2.1 Protective local ground
This ground connection is required to ensure that any exposed metalwork of the
assembly does not present a hazard to personnel; it also provides a low impedance
earth grounding circuit for any surge protection items used on the assembly. An M10
earth-grounding stud is provided on the assembly baseplate, which must be bonded
to the body of any protective enclosure and from there to the local plant structure.
Where multiple assemblies are installed inside one final enclosure, the grounding
studs for the individual baseplate must be connected in a “star” formation to the
grounding point on the enclosure.
Note: It is important to prevent these connections from loosening and also to protect
them from corrosion against the stainless steel grounding stud.

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INM9380-RD Rev 2
4.2.2 Cable shield ground
The cable shield is normally electrically isolated from the protective earth ground,
although the two may be deliberately interconnected in some grounding arrangements.
The cable shield wiring of both the trunk and spur cables should be connected to the
local terminals marked with an ‘S’.
WARNING!
The following may involve changes to wiring in the Trunk Terminal
Assembly. No part of the Trunk Terminal Assembly may be worked
while the enclosure is powered, unless the environment is known to
be non-hazardous.
The user has the option of two grounding methods for the assembly; the one adopted
should be the one that conforms to the system’s normal grounding method.
Whichever method is used, it is important to connect the screen/shield to a ground at
only one end of the cable.
The following options are available to the user.
4.2.2.1 Single point of grounding at host; trunk & spur shields interconnected








 


  








Figure 4.1 - Option 1
In many installations, the preferred method of grounding is to ground the fieldbus cable
shields at one point only, normally at the fieldbus power supply. In this case, the trunk
and spur cable shields are connected to each other at the Fieldbus Barrier and are not
connected to ground in the field. For this arrangement, connect the carrier shield ground
wire (marked A) into Terminal 2.
Note: this is the default grounding method for factory-supplied 9387-FB-R enclosures.
IMPORTANT NOTE
9387-FB-XX-R assemblies are factory-supplied with Option 1 grounding. If power
is applied locally, for example during commissioning, when the trunk cable shield
is NOT providing a ground connection, the spur cable shields must be grounded
according to Option 2.
When the trunk cable shield ground has been fully instated (or restored), the
grounding method should be returned to Option 1.
4.2.2.2 Trunk shield grounded at host; spur cable shields grounded at barrier












  






 
Figure 4.2 - Option 2