PROCESS AUTOMATION - Auser

PROCESS AUTOMATION 

Instruction Manual 

JUNCTION BOXES/ 

SEGMENT PROTECTORS

With regard to the supply of products, the current issue of the following document is applicable: 

The General Terms of Delivery for Products and Services of the Electrical Industry, as published by 

the Central Association of the "Elektrotechnik und Elektroindustrie (ZVEI) e.V.v", 

including the supplementary clause "Extended reservation of title". 

We at Pepperl+Fuchs recognise a duty to make a contribution to the future. 

For this reason, this printed matter is produced on paper bleached without the use of chlorine.

Junction Boxes/Segment Protectors 

Table of Contents 

1 Introduction ..............................................................................................3 

2 Fieldbus junction boxes Ex i ...................................................................5 

2.1 Intended use ............................................................................................................ 5 

2.2 Marking .................................................................................................................... 6 

3 Fieldbus junction boxes with short-circuit protection for 

Category 3G ..............................................................................................7 

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

3.2 Marking .................................................................................................................... 7 

3.3 Special features of fieldbus junction boxes with short-circuit current limiting 8 

4 Fieldbus junction boxes for installation in safe areas .........................9 

4.1 Intended use ............................................................................................................ 9 

4.2 Special features of fieldbus junction boxes with short-circui 

current limiting .................................................................................................... 10 

5 Ambient conditions ................................................................................11 

5.1 Fieldbus junction box Ex i ................................................................................... 11 

5.2 Fieldbus junction box with short-circuit current limiting for Category 3 G .... 11 

6 Mounting and dismounting ...................................................................12 

6.1 General .................................................................................................................. 12 

6.2 Fieldbus junction box Ex i ................................................................................... 12 

6.2.1 Fieldbus junction box Ex i in field housing F-JB-...I ......................................... 13 

6.2.2 Fieldbus junction box Ex i without field housing R-JB-I-... ...................................... 13 

6.3 Fieldbus junction boxes with short-circuit current limiting for Category 3 G 13 

6.3.1 Fieldbus junction boxes in field housing with short-circuit current limiting 

F-JBSC-... ........................................................................................................... 14 

6.3.2 Fieldbus junction boxes without field housing with short-circuit current limiting R- 

JBSC-..Mechanical dimensions. ............................................................................ 14 

6.3.3 Mechanical dimensions of the F2 housing ............................................................. 15 

6.3.4 Mechanical dimensions of F3 housing .................................................................... 16 

6.3.5 Mechanical dimensions of F4 housing .................................................................... 17 

6.3.6 Mechanical dimensions of F6 stainless steel housing ............................................ 18 

6.3.7 Mechanical dimensions of R version ...................................................................... 18 

Part.-No. 124147, Date of issue 25.05.2004 

7 Installation/commissioning ...................................................................19 

7.1 General .................................................................................................................. 19 

7.2 Fieldbus Junction Box Ex i .................................................................................. 20 

7.2.1 Fieldbus junction box Ex i in field housing F-JB-I-... ............................................ 20 

7.3 Fieldbus junction boxes with short-circuit current limiting for Category 3 G 21 

7.4 Grounding / shielding of fieldbus transmission lines ....................................... 21 

8 Connection layout. .................................................................................23 

8.1 Connection layout of the F2 and F6 housing as well as the R version ........... 23 

8.2 Connection layout of the F3 housing ................................................................. 25 

8.3 Connection layout of the F4 housing ................................................................. 26 

8.4 Connection layout of plug connectors ............................................................... 27 

Subject to reasonable modifications due to technical advances. 

Copyright Pepperl+Fuchs, Printed in Germany 

Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com 

1

Junction Boxes/Segment Protectors 

Table of Contents 

9 Maintenance of cable glands ................................................................28 

9.1 Maintenance of the F-JB-...CG cable gland .............................................. 28 

9.2 Maintenance of the F-JB...CGB and F-JB-...CGS cable gland ....... 29 

9.3 Maintenance of the F-JB...CGAB cable gland .......................................... 30 

9.4 Mounting the stop plug ........................................................................................ 31 

10 Repair and maintenance ........................................................................31 

11 Fault elimination .....................................................................................31 

12 Disposal ..................................................................................................31 

13 Appendix .................................................................................................32 

13.1 Accessories .......................................................................................................... 32 

Part.-No. 124147, Date of issue 25.05.2004 




2

Fieldbus junction boxes 

Introduction 

1 Introduction 

Pepperl+Fuchs offers a wide range of fieldbus junction boxes. The following type key 

provides an overview of the fieldbus junction boxes available: 

Part No. 124147, date of issue 25.05.2004 

Housing type 

F2 Aluminum field housings for fieldbus junction boxes with 4, 6, or 8 spurs 

F3 Aluminum field housings for fieldbus junction boxes with 2 spurs 

F4 Aluminum field housings for fieldbus junction boxes with 1 spur 

F6 Stainless steel field housings for fieldbus junction boxes with 4, 6 or 8 spurs 

R without field housing for 4, 6, or 8 lines for mounting on standard 35mm rail 

Type 

JB 

Junction box 

JBSC 

Junction box with short-circuit protection (Segment Protector) 

Application 

Empty Standard applications 

I Intrinsically safe applications 

Number of spurs 

1, 2, 4, 6 or 8 

Fieldbus type 

Empty Suitable for FOUNDATION fieldbus and PROFIBUS MBP (for cable glands 

only) 

FF For FOUNDATION fieldbus only (plug version only) 

PA For PROFIBUS MBP only (plug version only) 

Trunk connection 

CG Cable gland, plastic 

CGB Cable gland, brass, nickel plated 

CGAB Cable gland, brass for reinforced cable 

CGS Cable gland, stainless steel 

C Conduit 

7/8B 7/8" plug/socket, brass, nickel-plated 

7/8S 7/8" plug/socket, stainless steel 

M12B M12 plug/socket, brass, nickel-plated 

M12S M12 plug/socket, stainless steel 

spurjunction boxes connection 

Empty 

Like trunk 

CG 

Cable gland, plastic 

CGB 

Cable gland, brass, nickel plated 

CGAB 

Cable gland, brass for reinforced cable 

CGS 

Cable gland, stainless steel 

C 

Conduit 

7/8B 7/8" plug/socket, brass, nickel plated 

7/8S 7/8" plug/socket, stainless steel 

M12B 

M12 plug/socket, brass, nickel plated 

M12S 

M12 plug/socket, stainless steel 




3

Field bus distributor 

Introduction 

This instruction manual applies to all fieldbus junction boxes. 

This instruction manual consists of several sections, as follows: 

• Chapter 2 "Fieldbus junction boxes Ex i" covers all intrinsically safe fieldbus 

junction boxes for mounting in hazardous areas 

• Chapter 3 "Fieldbus junction boxes with short-circuit protection for Category 

3G" covers all fieldbus junction boxes suitable for application in hazardous areas of 

category 3G zone 2 or Class I, Division 2. 

• Chapter 4 "Fieldbus junction boxes for installation in safe areas" covers all 

fieldbus junction boxes not suitable for application in hazardous areas. 

• Chapters 5 through 13 discuss general topics which are applicable to all fieldbus 

junction boxes. 


4 

Zumutbare Änderungen aufgrund technischer Verbesserungen vorbehalten. 


Pepperl+Fuchs GmbH • 68301 Mannheim • Telefon +49 621 776-2222 • Telefax +49 621 776 272222 • Internet http://www.pepperl-fuchs.com


Fieldbus junction boxes Ex i 

2 Fieldbus junction boxes Ex i 

This chaper of the instruction manual applies to the fieldbus junction box Ex i for installation 

in hazardous areas. It applies only in conjunction with the respective data 

sheets. These data sheets are available online at www.pepperl-fuchs.com. 

The operator of the system bears the responsibility in terms of planning, 

mounting, commissioning, operation and maintenance, especially in 

conjunction with applications in areas subject to the danger of 

explosion. 

2.1 Intended use 

Fieldbus devices are often connected via spurs (stub lines) to the main line (trunk) of 

the fieldbus. Fieldbus junction boxes serve to connect fieldbus devices to a fieldbus 

transmission line (main line, or trunk). The following versions are available with 

different outputs for connecting field devices: 

• F2-JB-I... for up to 8 field devices F6-JB-I... for up to 8 field devices 

• F3-JB-I... for up to 2 field devices R-JB-I... for up to 8 field devices 

• F4-JB-I... for 1 field device 

For details of the type code, please see Kapitel 1 of this instruction manual. 

Fieldbus junction boxes can be used in any fieldbus system using the "Manchester 

Bus Powered" technology corresponding to IEC 61158-2. This includes the H1 bus of 

the FOUNDATION fieldbus and the PROFIBUS PA. In newer documentation, the 

PROFIBUS PA is also known as the PROFIBUS MBP or PROFIBUS MBP-IS, if the 

intrinsically safe variants are meant. 

Fieldbus junction boxes, depending on the ignition protection class of the power supply 

circuit, may be installed in Category 1 G (Zone 0), 2 G (Zone 1) or 3 G (Zone 2), 

or in Class I Div. 1 and 2, Class II Div. 1 and 2 or Class III Div. 1 and 2 in the temperature 

class T4 of a hazardous area. 

Fieldbus junction boxes that are operated in general electrical systems 

must not thereafter be operated in electrical systems that are connected 

with areas subject to the danger of explosions. 

All applicable laws and/or guidlines for the application or planned use must be 

observed. 


Fieldbus junction boxes meet the requirements of both the FISCO 

model and the requirements of the Entity model. 




5


Fieldbus junction boxes Ex i 

Fieldbus junction boxes are only approved for proper professional usage in accordance 

with the intended purposes. Improper handling will void any claim made under 

the warrantee and any manufacturer's liability. 

Protection of operating personnel and the system is not ensured if the 

module is not used in accordance with its intended purpose. 

Fieldbus junction boxes may only be operated by trained professionals in accordance 

with these operating instructions. 

2.2 Marking 

Fieldbus junction boxes intended for mounting in areas subject to the danger of explosion 

are marked with: 

Fieldbus junction box F-JB-I.... Fieldbus junction box R-JB-I.... 

Pepperl + Fuchs 


D-68307 Mannheim D-68307 Mannheim 

F-JB-I... * 

R-JB-I... 

¬ II 1 G EEx ia IIC T4 X ¬II 1 G EEx ia IIC T4 X 

* = 2 or 6 

Fieldbus junction box F-JB-I.... 

Pepperl+Fuchs Inc. 

Twinsburg, Ohio 44087 

F-JB-I... * 

¬ II 1 G EEx ia IIC T4 X 

* = 3 or 4 


6 



Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com

Instruction manual 

Fieldbus distributor with short-circuit protection for Category 3G 

3 Fieldbus junction boxes with short-circuit protection for Category 3G 

This chaper of the instruction manual applies to fieldbus junction boxes with short-circuit 

protection, suitable for installation in hazardous areas of Category 3G (Zone 2) or 

Class I, Division 2. 

It applies only in conjunction with the respective data sheets. The datasheets are 

available online at www.pepperl-fuchs.com. 

The operator of the system is responsible in terms of planning, 

mounting, commissioning, operating and maintenance. 


Fieldbus devices are often connected over spurs (stub lines) to the trunk (main line) 

of the fieldbus. Fieldbus junction boxes serve to connect fieldbus devices to a trunk. 

The following versions are available with different outputs for connecting field devices: 

• F2-JBSC-... 

• F6-JBSC-... 

• R-JBSC-... 

For specific details on the type code, please refer to Chapter 1 of this manual. 

Fieldbus junction boxes can be installed in any fieldbus system using "Manchester 

Bus Powered" technology in accordance with IEC 61158-2/ISA S50.02 for the United 

States of America. 

All applicable laws and/or guidelines for the application or planned use must be 

observed. 




Protection of operating personnel and the system is not ensured if the 

module is not used in accordance with its intended purpose. 

The device can only be operated by trained professionals in accordance with the 

available instruction manual. 


3.2 Marking 

Fieldbus junction boxes with short-circuit protection for installation in hazardous areas 

of Category 3G (Zone 2) or Class I, Division 2 are marked as follows: 




7


Fieldbus distributor with short-circuit protection for Category 3G 

Fieldbus junction box F-JBSC... Fieldbus junction box R-JBSC... 



D-68307 Mannheim D-68307 Mannheim 

F-JBSC... * 

R-JBSC... 

¬ II 3 G EEx nA [L]T4 ¬II 3 G EEx nA[L] II T4 X 

* = 2, or 6 

This fieldbus junction box may only be operated by trained professionals in accordance 


3.3 Special features of fieldbus junction boxes with short-circuit current limiting 

Fieldbus junction boxes F-JBSC-... (Segment Protectors) have short-circuit current 

limiting on the output (spur). The maximum permissible current is 40 mA per 

output. Short-circuit current limiting is activated at 45 mA and has a square 

characteristic curve. 


8 





Fieldbus distributors for installation in safe areas 

4 Fieldbus junction boxes for installation in safe areas 

This chapter of the instruction manual applies to fieldbus junction boxes which are 

not suitable for installation in hazardous areas. It is applicable only in conjunction 

with the corresponding data sheets. You can access the data sheets at 

www.pepperl-fuchs.com. 

Responsibility for planning, installation, commissioning, 

operation, and maintenance lies solely with the operator of the system. 

Fieldbus junction boxes for installation in safe areas are available in 2 variants: 

• Fieldbus junction boxes without short-circuit current limiting on output (spur) 

F-JB-... (with = 2, 3, 4 or 6) or R-JB-... 

• Fieldbus junction boxes with short-circuit current limiting on output (spur), so-called 

Segment protectors, F-JBSC-... (with = 2 or 6) or R-JBSC-... 


Fieldbus devices are frequently connected to the trunk of the fieldbus with spurs. 

Fieldbus junction boxes are used to connect fieldbus devices to a a fieldbus 

transmission line (trunk). The following versions are available with different 

outputs for connecting field devices: 

• F2-JB-... and F2-JBSC-... for up to 8 field devices 

• F3-JB-... and F3-JBSC-... for up to 2 field devices 

• F4-JB-... and F4-JBSC-... for 1 field device 

• R-JB-... and R-JBSC-...for up to 8 field devices 

For specific details on the type code, please refer to Kapitel 1 of this manual. 

Fieldbus junction boxes can be used in any fieldbus system using the "Manchester 

Bus Powered" technology in accordance with IEC 61158-2. 

All applicable laws and/or guidelines for the application or planned use must be 

observed. 





Protection of operating personnel and system is not guaranteed 

if this component is used for a purpose for which it was not 

intended. 

The fieldbus junction box may only be operated by trained professionals in accordance 





9



4.2 Special features of fieldbus junction boxes with short-circuit current limiting 

The fieldbus junction boxes F-JBSC-... and R-JBSC-... have short-circuit current 

limiting on outputs (spur). The maximum permitted supply current is 40 mA per spur. 

Short-circuit current limiting is activated at 45 mA and has a square 

characteristic curve. 


10 






5 Ambient conditions 

This chapter of the instruction manual applies to all fieldbus junction boxes. 

The ambient temperature range of each fieldbus junction box can be found in its data 

sheet. These data sheets are available for download at 

http://www.de.pepperl-fuchs.com. 

5.1 Fieldbus junction box Ex i 

At a maxum ambient temperature of 85°C and a maximum current of 3 A, the 

maximum surface temperature of the distributor is 100°C. 

5.2 Fieldbus junction box with short-circuit current limiting for Category 3 G Zone 

2 

At a maximum ambient temperature of 70°C a maximum surface temperature of 

120°C results. 





11


Mounting and dismounting 

6 Mounting and dismounting 

This chapter applies to all fieldbus junction boxes. 

6.1 General 

Mounting and dismounting are only to be performed by specially trained professionals. 

The housings of the fieldbus junction boxes are designed for mounting on walls. For 

the 

• F2 housing, 2 screws with a diameter of 6mm should be used. 

• For the F3/F4 housing, 2 screws with a diameter of 4 mm should be used. 

• For the F6 housing, 2 or 4 screws with a diameter of 6 mm should be used. 

• Mounting accessories should be chosen corresponding to the existing mounting 

surface. The selection should be made to ensure a secure attachment. 

• Fieldbus junction boxes of the R version are to be mounted on a 35 mm DIN rail 

compliant with EN 50022. 

Recognized rules of the technology and setup requirements must be observed during 

mounting and dismounting. Especially for tasks on electrical systems, special safety 

requirements must be observed. Special attention must be paid to the following 

points: 

1. Has the fieldbus junction box been installed in accordance with specifications? 

2. Is the fieldbus junction box free of damage? 

3. Is IP protection ensured? 

4. Are the screws tightened securely? 

The torque to use on the fastening screws depends on the screws used. 

The cover screws should be tightened to a torque of 2.5 Nm. 

6.2 Fieldbus junction box Ex i 

When installing the fieldbus junction box Ex i in hazardous areas, the following points 

are particularly important: 


12 






6.2.1 Fieldbus junction box Ex i in field housing F-JB-...I 

Fieldbus junction boxes must be protected from electrostatic charge. 

In Category 1G Zone 0, the fieldbus junction box must be installed in 

such a way that even in the event of occasional service interruptions, 

ignition sources resulting from sparks due to striking or abrading metal 

are avoided. 

Fieldbus junction boxes with plastic cable glands must be installed in 

such a way that the glands are protected from mechanical damage. 

6.2.2 Fieldbus junction box Ex i without field housing R-JB-I-... 

The fieldbus junction boxes R-JB-I... are designed for installation on standard 35 mm 

rails in accordance with EN 50 022. 

They must be installed in a housing corresonding to at least an ignition 

protection class 20 in accordance with EN 60529. The housing must be 

suitable for this purpose. 

For use in Category 1 (Zone 0), the use of a plastic housing is not 

allowed. 

If metal housings are used, they must be installed in such a way that 

even in the event of occasional service ignition sources resulting from 

sparks due to striking or abrading metal are avoided. 


If plastic housings are used in Category 2G and 3G (Zone 1 and 2), it 

must be constructed in such a way that if used as intended, ignition 

danger from electrostatic charge during maintenance and cleaning are 

avoided. 

6.3 Fieldbus junction boxes with short-circuit current limiting for Category 3 G 

Fieldbus junction boxes with short-circuit current limiting may only be installed in 

hazardous areas of Category 3 G (Zone 2) or or Class I, Division 2. The following 

points are particularly 




13



to be considered. 

Only devices suitable for use in Zone 2 resp. or Class I, Division 2 and at the installation 

location, and for which the corresponding documents (manufacturer declaration 

or certificate from inspecting authorities) are in order, may be connected to electric 

circuits in Zone 2 resp. or Class I, Division 2. 

6.3.1 Fieldbus junction boxes in field housing with short-circuit current limiting 

F-JBSC-... 


6.3.2 Fieldbus junction boxes without field housing with short-circuit current limiting 

R-JBSC-..Mechanical dimensions. 

Fieldbus junction boxes without field housings must be installed in an 

enclosure which corresponds at least to ignition protection class 54 

in accordance with EN 60529. The enclosure must be suitable for this 

purpose. 

If a plastic enclosure is used, then it must be constructed in such a way 

that if used as intended, ignition danger from electrostatic charge during 

maintenance and cleaning are avoided. 


14 






6.3.3 Mechanical dimensions of the F2 housing 

258 

228 

240 

(57) 

for fixing 

with screws M6 

Figure 6.1: Mechanical dimensions of F2 housing 

The dimensions X and SW depend on the type of cable gland. The dimensions can 

be read from the following table: 


114 

9.5 

84 

20 24 

X 

Width across flats SW 




15



Type X SW 

F2-JB...-CG... < 26 mm 20 

F2-JB...-CGB... < 26 mm 20 

F2-JB...-CGS... < 26 mm 22 

F2-JB...-CGAB... < 46 mm 24 

Table 6.1: Dimensions of cable glands 

6.3.4 Mechanical dimensions of F3 housing 

175 

163 

80 

52 

X 




be read from Table 6.1. 

The height of the housing is 58 mm. 


16 






6.3.5 Mechanical dimensions of F4 housing 

X 80 

X 

52 

75 

63 

X 




be read from Table 6.1. 

The height of the housing is 58 mm. 





17



6.3.6 Mechanical dimensions of F6 stainless steel housing 

Figure 6.4: Mechanical dimensions of F6 stainless steel housing 

The above diagram shows the F6 housing without cable glands. For overall 

dimensions, the values for cable glands corresponding to Table 6.1 must be added. 

6.3.7 Mechanical dimensions of R version 

Figure 6.5: Mechanical dimensions of R version 


18 





Installation/commissioning 

7 Installation/commissioning 

This chapter of the instruction manual applies to all fieldbus junction boxes. 

7.1 General 

Fieldbus junction boxes may only be operated by trained professionals in accordance 


Please take the cable parameters to be used from the installation instructions of the 

corresponding fieldbus system. 

• The insulating length of the leads is 9 mm (only for fieldbus junction boxes with 

screw terminals). 

• If stranded wires are used, the wire ends must be protected from fraying, for 

instance by using end splices. 

• The following identifying values must be observed when connecting fieldbus 

transmission lines: 

• Tightening torque of the screw terminals (if present) 0. 4... 0.5 Nm 

• Tightening torques of the screwed connection of cable pass-throughs: 

The tightening torques of cap nuts depend on what type of cable is used and must 

therefore be determined by the user. The cap nuts must be securely tightened. 

Tightening the cap nuts too tight can have a negative effect on the protection class. 

The following figures should be taken as rough guides: 

Type 

F-JB-...CG 

F-JB-...CGB 

F-JB-...CGS 

F-JB-...CGAB 

Table 7.1: Tightening torques 

Cap nut 

2.5 Nm 

4.11 Nm 

4.11 Nm 

22 Nm 

The tightening torques given in Table 7.1 are valid for fieldbus junction 

boxes for which identical cable glands are used for both trunks and 

spurs. It is possible for fieldbus junction boxes to be installed with different 

connection types for trunks and spurs (see Chapter 1). The tightening 

torques given in Table 7.1 are valid whether or not, for instance, 

cable glands are used for the trunk or the spurs or both. 


The power supply must always be through the connector for fieldbus junction boxes 

with plug connections. 

The cap nut of the connector is to be hand-tightened. 

Unused connectors must be secured in such a way that the ignition protection class 

is maintained. 

For fieldbus junction boxes with cable glands, power must always be supplied through 

the input, that is, through the second cable gland from the right (as seen from above) 

(compare Figure 8.1 and Figure 8.3). 




19



In order to maintain the ignition protection class, all unused cable glands must 

be plugged with a suitable closing plug or replaced by a suitable closing screw. 

The closing plugs and screws must be suitable for this application. 

7.2 Fieldbus Junction Box Ex i 

Fieldbus junction boxes may be installed in accordance with their ratings in zones 0, 

1 or 2, or in Class I Div. 1 and 2, Class II Div. 1 and 2 or Class III Div. 1 and 2. 

In category 1 CG (zone 0), the power supply circuit must comply with 

ignition protection class "ia". 


The Declaration of Conformity must be observed. It is especially 

important to maintain any "special conditions" that may be indicated. 

If installation is performed in compliance with the FISCO model, the maximum length 

of each spur is limited to 30 m. 

If stranded wires are used in hazardous areas, the wire ends must be protected from 

fraying, for instance by using end splices. 

The diameter of individual wires in hazardous areas may not be less than 0.1 mm. 

This also applies to the individual strands of stranded wires. 

During installation of intrinsically safe fieldbus junction boxes and fieldbus segments, 

EN 60079-14/IEC 60079-14 should be observed. For the Federal Republic of Germany, 

the "NationalForeword“ of DIN EN 60079-14/VDE 0165 Part 1 must also be observed. 

7.2.1 Fieldbus junction box Ex i in field housing F-JB-I-... 

For metallic housings in hazardous areas, a suitable potential equalization compliant 

with EN 60 079 is required. A ground screw is provided for this purpose on the F2/F6 

housings, and a ground terminal on the F3/F4 housings. Connections must be 

secured against loosening and protected against corrosion. Corrosion protection can 

be achieved, for example, by using tinned cable plates. 

Only permanently laid cables and lines must be fed into the cable glands. For the permissible 

cable diameters, please refer to the respective data sheet. The operator 

must provide a suitable strain relief (for instance, a suitable cable clamp). The 

mounting notes in Chapter 6.2.1 must be observed. 

Before closing the cover, a visual inspection should be performed to ensure that the 

cover seal shows no visible damage. In case of damage, the seal must be replaced 


20 






with an original seal. 

The screws on the cover should be tightened to a torque of 2.5 Nm. 

7.3 Fieldbus junction boxes with short-circuit current limiting for Category 3 G 

The integrated fieldbus resistor may only be connected if 

• the fieldbus junction box is the last one on the fieldbus segment and 

• the fieldbus resistor of the field device is not in use. 

The position of the slide switch can be seen in Figure 8.1 for the F2 and F6 housings, 

in Figure 8.3 for the F3 housing, or in Figure 8.5 for the F4 housing. 

Only devices suitable for operation in hazardous areas in Zone 2 or Class I, Division 

2 and the local operating conditions may be connected to these circuits (see manufacturer's 

statement or certificate from inspection authorities). 

The fieldbus junction box R-JBSC-... should be set up in such a way 

that at least protection class IP54 according to EN 60529 is maintained. 

The connection and disconnection as well as the switching of circuits 

carrying current is permitted only during installation or maintenance, 

or for purposes of repair. 

Note: The temporary coexistence of potentionally explosive 

atmosphere and installation, maintenance, and repair is considered 

improbable in Zone 2 resp. Class I, Division 2. 

All unused cable glands must be plugged with a suitable closing plug or replaced 

by a suitable closing screw. The closing plugs and screws must be suitable for this 

application. 

Unused M12 and 7/8" connectors must be secured in such a way that 

protection class IP54 according to EN 60529 is maintained. 

M12 and 7/8" connectors may only be connected or disconnected in 

when power is switched off. 


7.4 Grounding / shielding of fieldbus transmission lines 

Shielding connections of spurs are connected internally with the "S" terminal. Shielding 

connections of trunks are connected internally with the "T" terminal. 

The terminals are connected with the external grounding clamp. 

If the shields of spurs will be hard grounded, only terminal S needs to be 

connected via accessory part JB-BR-TB with one of the terminals . 




21



If the shields of trunks will be hard grounded, only terminal T needs to be 

connected via accessory part JB-BR-TB with one of the terminals . 

By connecting a suitable capacitor between the and "S" or "T" clamps, a capacitive 

ground of the shield of the corresponding fieldbus transmission line is achieved. 

If terminals "S" or "T" are not connected with terminal , the shield of the fieldbus 

transmission line in question is not grounded. 

If the shield of the trunk or spurs of a fieldbus transmission line is grounded due to 

EMC considerations, Section 12.2.2.3 of EN 60079-14 and Section 3.3.3 of the PNO 

Handbook PROFIBUS MBP, or Sections 6.2 and 6.3 of the FOUNDATION Fieldbus 

Application Guides, should be closely observed. 

Further information about grounding can be found in the "Wiring + Installation Guide" 

or in the "FOUNDATION Fieldbus Pre-Engineering Document" from Pepperl+Fuchs. 


22 






8 Connection layout. 

8.1 Connection layout of the F2 and F6 housing as well as the R version 

Wall mounting 

Screw o 6 mm 

Fieldbus junction boxes for intrinsically safe fieldbus systems are identical 

to standard fieldbus junction boxes in terms of their layout. If fieldbus 

junction boxes are used for intrinsically safe fieldbus systems, the 

connections for the trunks and spurs (position and terminal designation) 

are identical to the connections of intrinsically safe trunks and 

intrinsically safe spurs. The same applies for cable pass-throughs and 

connectors. 

Connections for 

spurs 


trunks 

Slide switch 

fieldbus terminating 

resistor 

(only for non-Ex 

versions) 

Fastening 

option for 

cable connector 

with cable 

fastener 

Cable pass-through for 

spurs 

Input 

Output 

Cable pass-through for 

trunk 

Grouding screw 

Figure 8.1: F2 housing (4, 6 or 8 outputs) 

SPUR 1 SPUR 2 SPUR 3 SPUR 4 SPUR 5 SPUR 6 SPUR 7 SPUR 8 TRUNK IN TRUNK OUT SHIELD 

10+ 11- 12s 13+ 14- 15s16+ 17- 18s 19+ 20- 21s 22+ 23- 24s 25+ 26- 27s 28+ 29- 30s 31+ 32- 33s 1+ 2- 3s 4+ 5- 6s T S 

Figure 8.2: Connection layout of the terminal strip in the F2 and F6 housing as well 

as in the R version (4, 6 or 8 outputs) 


Terminal 

10+, 13+, 16+, 19+, 22+, 

25+, 28+ and 31+ 

11-, 14-, 17-, 20-, 23- , 26-, 

29- and 32- 

Function 

Spur (Spur) + 

Spur (Spur)- 




23



Terminal 

12s, 15s, 18s, 21s, 24s, 27s, 

30s and 33s 

Function 

Spur (Spur) shield 

1+ Trunk, input (Trunk In)+ 

2- Trunk, input (Trunk In) - 

3s 

Trunk, input (Trunk In), shield 

4+ Trunk, output (Trunk Out) + 

5- Trunk, output (Trunk Out) - 

6s 

Trunk, output (Trunk Out), shield 

T 

Trunks, shield 

S 

Spurs shield 

Potential equalisation 

The 3s and 6s terminals are internally connected to terminal T. Terminals 12s, 

15s, 18s, 21s, 24s, 27s, 30s and 33s are connected internally with terminal S. 

The terminals are connected to the external grounding terminal. 


24 






8.2 Connection layout of the F3 housing 

Slide switch 


resistor 

(only for non-Ex 

versions) 


spurs 


trunk 

Wall mounting 

Screw o 4 mm 

Grounding clamp 

Cable glands 

for spurs 

Input 

Output 

Cable glands for the 

trunk 

Figure 8.3: F3 housing (2 outputs) 

SPUR 1 SPUR 2 TRUNK IN TRUNK OUT SHIELD 

Figure 8.4: Connection layout of the terminal strip in the F3 housing (2 outputs) 


Terminal 

Function 

7+ and 10+ Spur (Spur) + 

8- and 11- Spur (Spur) - 

9s and 12s 

Spur shield 

1+ Trunk, input (Trunk In) + 


3s 




6s 

Trunk, output (Trunk Out), shield 

T 

Trunks (Trunk), shield 

S 

Spurs (Spur). shield 





25



The 3s and 6s terminals are internally connected to terminal T. Terminals 9s and12s 

are connected internally with terminal S. The terminals are connected to the 

external grounding terminal. 

8.3 Connection layout of the F4 housing 

Wall mounting 

Screw o 4 mm 

Cable gland 

for the trunk 

(Input) 

Cable gland 

for the spur 

Cable gland 

for the trunk 

(Output) 

Slide switch for 


resistor 

(non-Ex versions only) 

Grounding clamp 

Figure 8.5: F4 housing (1 output) 

TRUNK IN SPUR TRUNK OUT SHIELD 

Figure 8.6: Layout of the connections of the internal terminal strip in the F4 housing 

(1 output) 

Terminal 

Function 

1+ Trunk, input (Trunk In) + 


3s 


4+ Spur (Spur) + 

5- Spur (Spur) - 

6s 

Spur (Spur) shield 



9s 

Trunk, output (Trunk Out) , shield 

T 

Trunks (Trunk), shield 

S 

Spurs (Spur). shield 



26 






The 3s and 9s terminals are internally connected to terminal T. Terminal 6s is 

connected internally with terminal S. The terminals are connected to the 

external grounding terminal. 

8.4 Connection layout of plug connectors 

M12 connectors 

7/8" connectors 

Socket female 

Plug male 

Socket female 

Plug male 

3 4 

4 3 

3 

1 

1 

3 

2 

1 1 

M12 

2 

4 

2 2 

7/8" 

4 

Figure 8.7: Layout of the connections on the connectors: 

In the case of connectors, contacts vary depending on the fieldbus system used. 

PROFIBUS MBP 

FOUNDATION Fieldbus 

Pin Signal Signal 

1 PA+ Data - 

2 n. c. (GND) Data + 

3 PA- Shield 

4 Shield n. c. (GND) 





27


Maintenance of cable glands 

9 Maintenance of cable glands 

9.1 Maintenance of the F-JB-...CG cable gland 

1. Insulate the covering of the cable to around 

160 mm. 

2. Loosen the cap nuts from the 

fieldbus junction box and push it onto the cable. 

Remove the seals from the fieldbus junction 

box as well and push them onto the cable. 

The following table details when seal 1 must 

be installed and when it may be omitted: 

Type 

Terminal 

area [mm] 

Seal 1 

M16 x 1.5 5 - 10 No 

M20 x 1.5 5 - 8 Yes 

M20 x 1.5 8 - 13 No 

Seal 2 must always be used! 

3. Push the seal used onto the cable so that the 

insulation sticks out of the seal about 5 mm. 

4. Push the cable and all seals used into the 

cable gland of the fieldbus junction box. 

Then tighten the cap nut. 

The tightening torques of cap nuts depend on 

what type of cable is used and must therefore 

be determined by the user. 

A good general rule for fieldbus junction boxes 

of type F-JB-*.CG is 2,5 Nm for the 

cap nuts. 

Observe the notes on page 19 of this 

instruction manual. 

Step 1 

Step 2 

Seal 1 

Seal 2 

Step 3 

Step 4 


28 






9.2 Maintenance of the F-JB...CGB and F-JB-...CGS cable gland 

1. Insulate the covering of the cable up to about 

160 mm. 

2. Loosen the cap nuts from the 

fieldbus junction box and push it onto the cable. 

3. Remove the seals from the fieldbus junction 

box as well and push them onto the cable. 

Move the inside plastic part far enough over 

the cable that the covering is completely 

surrounded by the seal. 

The insulation should not come further than 

the end of the inner plastic piece. 

4. Pull the shield over the inside plastic 

part and shorten it to the correct length. 

The shield should project about 3 to 4 mm 

over the O ring. 

5. Push the cable and inner plastic piece 

into the lower part of the cable gland. 

6. Then tighten the cap nut. 

The tightening torques of cap nuts depend on 

what type of cable is used and must therefore 

be determined by the user. 

A good general value for fieldbus junction 

boxes of type F-JB-...CGB and F- 

JB-...CGS is 4.17 Nm. 

Please observe the information on page 19 

of this instruction manual. 

Step 1 

Step 2 

O ring 

Inner plastic piece 

Step 3 

O ring 

3 to 4 mm 

Step 4 

Step 5 


Step 6 




29



9.3 Maintenance of the F-JB...CGAB cable gland 

For this cable gland, the type ADE No. 6 type 4F is used. For handling, please refer 

to the following overview: 


30 






9.4 Mounting the stop plug 

A cable pass-through that is not being used must be provided with a stop plug to 

maintain the protection class. 

When mounting the stop plug, the cable pass-through must be provided with all seals. 

Stop plug 

Cap nut 

Lower part 

1. Remove the cap nut from the lower part if this has not already been done. 

2. Push the stop plug up into the cable pass-through as far as it will go. 

3. Tighten the cap nut securely. Note the tightening torques in Chapter 9.1 and in 

Chapter 9.2. 

10 Repair and maintenance 

The transmission behavior of the fieldbus junction box is stable even over long periods 

of time. There is thus no need for regular adjustments or similar tasks. Maintenance 

is therefore not required. 

11 Fault elimination 

Fieldbus junction boxes that are operated in connection with areas subject to the danger 

of explosion must not be modified. If there is a defect, the fieldbus junction box 

must always be replaced. 

Defective housing parts (for example, cover seals) may only be replaced by original 

parts. Tasks for eliminating malfunctions must only be performed by specialists who 

are specially trained and authorised for the task. 

12 Disposal 


Disposal of the packaging and fieldbus junction box must only take place in accordance 

with the requirements of the country in which the segment coupler is installed. 

The fieldbus junction box does not contain any batteries that must be disposed of 

separately from the fieldbus junction box. 




31


Appendix 

13 Appendix 

13.1 Accessories 

Function 

Moulded seal for F2 housing 

Cap M12 connector 

Stop plug for M16 cable gland 

Cap for 7/8" connector 

Stop plug M20, approved for hazardous area 

Shorting links 

Type code 

F 2 04-AVP3E 

VAZ-V1-B 

M16-CG Plug 

V9-R-F-COV 

M20 Ex 

JB-BR-TB 


32 




The general terms of delivery for products and services produced or provided by the electrical industry as 

published by the Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V. 

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We at Pepperl+Fuchs feel obligated to contribute to the future; 

this publication is, therefore, printed on paper bleached without the use of chlorine.

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Subject to reasonable modifications due to technical advances · Copyright Pepperl+Fuchs · Printed in Germany · Part. No. 

124147 05/04 03

PROCESS AUTOMATION - Auser

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