background image

12

13

INM MTL9373-FB3 Rev 1

INM MTL9373-FB3 Rev 1

In each case the active trunk cable is wired directly to the ‘TRUNK IN’ Fieldbus 
Barrier terminals. 

The trunk wiring area on the barrier is fitted with a protective plastic cover – 
see Figure 5.5. This cover, together with its warning instructions, is intended to 
remind the user that working on the trunk connections, without first isolating 
the trunk power, is NOT permitted. 

 

IMPORTANT

Cable ferrules must be fitted to any stranded cable or screen wiring that is being used.

Figure 5.5

 – Fieldbus Barrier Trunk wiring cover removal.

To remove the trunk wiring cover - First remove the securing screws then press 
on the upper edge of the transparent protective cover in the area between the 
arrows shown in Figure 5.5 to release the retaining clip, then remove the cover 
and move it to the side to obtain access. 

Prepare the trunk cable in accordance with the gland manufacturer’s 
instructions. 

 

1.  Feed the trunk cable through the gland in the enclosure wall and ensure  

 

 

that any cable armour has a low impedance connection to the enclosure’s  

 

 

protective local ground. 

 

2.  Route the trunk cable through the trunking to provide appropriate  

 

 

separation from the spur wiring

 

3.  Ensure also that there is sufficient length of cable inside the enclosure to  

 

 

allow for bends etc. and without causing any strain. 

Connect the prepared ends of the incoming fieldbus trunk cable into the + 
, – and ‘S’ terminals of the ‘TRUNK IN’ connector – see Figure 5.6 - observing 
colour coding in accordance with site wiring regulation.

Figure 5.6

 – Fieldbus Barrier Trunk wiring.

If there is no surge suppressor connected into the ‘TRUNK OUT’ terminals 
– as in the Figure 5.4 (right) diagram - then a trunk output cable may also be 
prepared in a similar manner and connected to the ‘TRUNK OUT’ terminals for 
onward connection to an additional enclosure.

  •  Proceed now to Section 5.5.3 to choose the correct position for the  
 

 

Trunk Terminator  link   

5.5  Standard Large Enclosure – Trunk Wiring details

 
Use this section for guidance if the Standard Large enclosure has been chosen.

The Standard Large Enclosure has more options than the Standard Small as it 
can be fitted with additional terminals to marshal and manage unused/spare 
trunk cables, and can include Trunk Surge Suppression while also permitting the 
use of the Trunk Out terminals. The additional terminals are mounted at the top 
of the enclosure on a DIN-rail above the Fieldbus Barrier - see Figure 5.7.

Figure 5.7

 – Cutaway examples of Standard Large enclosure showing surge 

suppression terminal wiring and terminals for managing spare trunk cable pairs.

Summary of Contents for Crouse-Hinds 9373-FB3 Series

Page 1: ...9373 FB3 MTL Compact Fieldbus Barrier System June 2020 INM MTL9373 FB3 Rev 1 Instruction manual MTL fieldbus networks ...

Page 2: ... 15 5 5 3 Trunk Termination 16 5 6 Spur wiring connections 17 5 6 1 Connecting the spur cables 17 5 6 2 Fitting FS32 Spur Surge modules 17 5 7 Final checks 18 6 MAINTENANCE 19 6 1 General 19 6 2 Spur connections 19 6 2 1 Removing a Spur Surge module 19 6 2 2 Adding a Spur Surge module 19 6 3 Trunk connections 20 6 4 Removal and replacement of a module 20 21 6 5 Replacement of a TP 32 Surge Suppres...

Page 3: ...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 instru...

Page 4: ...dbus instruments in IIC Zone 0 hazardous areas The spur connections are compatible with both FISCO and Entity certified field instruments The fieldbus barrier is mounted in a 316L stainless steel increased safety Ex e enclosure that segregates spur and trunk cabling in accordance with hazardous area certification Inside the enclosure the incoming trunk wiring terminates in a separate compartment c...

Page 5: ...afe Intrinsically safe spurs 1 2 3 10 11 12 Intrinsically safe spurs T 1 2 3 10 11 12 from HOST Trunk Not intrinsically safe Intrinsically safe spurs 1 2 3 10 11 12 Intrinsically safe spurs T a b c 4 MECHANICAL INSTALLATION See Figure 4 1 and 4 2 below for the dimensions fixing locations and cable gland positions of the two main enclosure options Figure 4 1 Fieldbus Barrier Standard Small enclosur...

Page 6: ...for ease of removal and so any blanking plugs that are not removed must be tightened to the required torque before operation to meet the IP rating g All cable gland holes must contain either a suitable cable gland or a blanking plug WARNING It is not permitted to create additional holes in the enclosure as this would violate the certification 4 2 Preparation a Remove any temporary protection or pa...

Page 7: ...nnection is isolated from any source of power CAUTION The temperature inside the enclosure could rise to 60 C Ensure that all cables and cable glands fitted are rated to withstand these temperatures 5 1 Overview The barrier module receives power from the incoming trunk cable and requires no further source of power The equipment shall be powered only from supplies conforming to IEC 61158 2 Type A f...

Page 8: ... A B Local ground A B Host ground Trunk shield Spur shields 5 3 Trunk cable wiring The 9373 FB3 PX SS product has a range of user options for trunk wiring These range from a single trunk cable entry allowance for an onward link to a second enclosure as shown in Section 3 and the ability to manage and marshal multiple spare trunk pairs if required In addition the option for surge protection on the ...

Page 9: ...ur wiring 3 Ensure also that there is sufficient length of cable inside the enclosure to allow for bends etc and without causing any strain Connect the prepared ends of the incoming fieldbus trunk cable into the and S terminals of the TRUNK IN connector see Figure 5 6 observing colour coding in accordance with site wiring regulation Figure 5 6 Fieldbus Barrier Trunk wiring If there is no surge sup...

Page 10: ...he trunk cable entering the enclosure has no spare wires requiring management ignore this section and move on to Section 5 5 3 The Standard Large enclosure may be ordered with additional terminals to manage multi core cables where only one cable pair is used for the active trunk circuit These spare pairs may require only to be managed in a convenient way or they may be an element of the system des...

Page 11: ...ctor supplied on the carrier and remove it from its socket b Insert the FS32 module into the now vacant socket on the carrier tighten the two side securing screws and the central protective ground screw to a recommended torque of 0 5 0 6 Nm c Fit the connector removed at Step 1 above into the socket on the FS32 and tighten its two securing screws also to a recommended torque of 0 5 0 6 Nm Removal ...

Page 12: ...S32 Spur Surge Protection modules All other wiring to the barrier requires the trunk power to be isolated or a gas clearance certificate to be obtained before any work is carried out 6 2 Spur connections All of the spur connections are intrinsically safe and therefore may be live worked in a hazardous area without gas clearance while complying with normal permit to work procedures If spur wiring i...

Page 13: ...b Loosen the two screws securing the pluggable TRUNK IN wiring connector and unplug it Do the same for a TRUNK OUT connector if there is a cable connected Arrange these safely to the side of the barrier c In turn loosen the two screws securing each pluggable spur wiring connector and unplug the connectors Arrange the connector wiring so that you have access to the barrier fixings d The barrier is ...

Page 14: ...hat theTerminator link is in the correct position Replace the transparent protective cover over the terminal block and ensure that there is positive engagement of the retaining clip 6 6 Regular Maintenance checks Check the general condition of the installation occasionally to ensure that no deterioration has occurred At least every two years and more frequently for harsh dusty or dirty environment...

Page 15: ...esher training shall be given on a regular basis See clause 4 2 of EN 60079 17 b The apparatus has been designed and manufactured so as to provide protection against all the relevant additional hazards referred to in Annex II of the Directive such as those in clause 1 2 7 c This apparatus has been designed to meet the requirements of electrical apparatus in accordance with EN 60079 0 EN 60079 7 EN...

Page 16: ...y have specific requirements which should also be met c Maintenance of internal components while powered is limited to those actions permitted in Section 5 of this manual 8 5 Repair This product or any of its ancillary fittings cannot be repaired by the user and must be replaced with an equivalent certified product 8 6 Marking Each barrier is marked in compliance with the Directive and CE marked w...

Page 17: ...India No 36 Nehru Street Off Old Mahabalipuram Road Sholinganallur Chennai 600 119 India Tel 91 0 44 24501660 24501857 Fax 91 0 44 24501463 E mail mtlindiasales eaton com ITALY MTL Italia srl Via San Bovio 3 20090 Segrate Milano Italy Tel 39 02 959501 Fax 39 02 95950759 E mail chmninfo eaton com JAPAN Cooper Crouse Hinds Japan KK MT Building 3F 2 7 5 Shiba Daimon Minato ku Tokyo Japan 105 0012 Tel...

Reviews: