JBSC - Auser

Fieldbus Segment Protector 

*-JBSC-* 

Fieldbus junction box with integrated short-circuit current limitation 

Type code see overleaf 

Connection 

Shielding variations 

Main cable 

Trunk IN Trunk OUT 

• Fieldbus distributor with individually 

short-circuit current limited outputs 

• 4, 6 or 8 outputs, certified in 

accordance with EEx nL IIC, for 

connection of spurs for one field 

device each 

• For PROFIBUS PA and 

FOUNDATION Fieldbus H1 

• Inbuild surge protection for trunk and 

spurs 

• Fault signal via LED 

• Switchable integrated fieldbus 

terminator 

• Different versions of shielding are 

possible 

• Installation permissible in zone 2 

• Variants for cabinet installation on 

DIN mounting rail 

• Different housing and cable 

connection variants for installation in 

the field 

• Cabinet variants with removable 

screw terminals 

T i + T i - T is T o + T o - T os 

PA T S PA PA 

Fieldbus terminator 

S1 

I 

I 

I 

I 

I 

I 

I 

I 

1+ 1- 1s 2+ 2- 2s 3+ 3- 3s 4+ 4- 4s 5+ 5- 5s 6+ 6- 6s 7+ - 7- 7s 8+ 8- 8s 

Spur 1 

Outputs 

Spur 2 Spur 3 Spur 4 Spur 5 Spur 6 Spur 7 Spur 8 

S1: Fieldbus terminator, switchable 

Function 

Release date 2006-03-16 10:34 Date of issue 2006-03-16 T17250_ENG.xml 

The *-JBSC-* Fieldbus Segment 

Protectors are used in signal transfer 

topologies based on PROFIBUS PA or 

FOUNDATION Fieldbus H1 fieldbus 

according to IEC 61158-2. They allow 

the distribution of the fieldbus trunk to a 

number of branch lines (spurs) for the 

connection of fieldbus devices. 

Each spur is individually monitored for 

short circuits. Thus a fault at one spur 

does not have any negative feedback 

on the remaining segment. Each spur is 

designed for the connection of one field 

device. The trunk can be looped 

through. 

The versions R-JBSC-* are designed 

for cabinet installation on DIN mounting 

rails. For installation in the field several 

housing types with different cable 

glands as well as plug connections are 

available. A switchable fieldbus 

terminator is integrated. Several 

shielding variants are possible. 

Composition 

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

Technical data 



Fieldbus interface 

Main cable (Trunk) 

Connection see table 1 

Rated voltage 

9 ... 31 V DC 

Rated current 

≤ 6 A 

Screening option 

looped through direct to earth potential, trunk and outputs 

Outputs 

Connection see table 1 

Rated voltage 

≤ 31 V 

Rated current 

≤ 40 mA 

Short-circuit current 

Screening option 

Self current consumption 

Voltage drop main cable/outputs 

≤ 45 mA 

looped through direct to earth potential, trunk and outputs 

max. 9 mA 

≤ 1.3 V 

Terminator 

switchable 100 Ω integrated 

Surge protection 

trunk, spurs overvoltage protected if voltage exceeds typ. 39 V, max. 41 V 

Indicators/operating means 

LED voltage Fieldbus 

green: Fieldbus voltage > 10V 

LED status Fieldbus 

yellow: bus activity 

LED state outputs 

red flashing: short-circuit 

Directive conformity 

Electromagnetic compatibility 

standards 

Directive 89/336/EC EN 61326 

Standard conformity 

Electromagnetic compatibility NE 21 

Protection degree IEC 60529 

Fieldbus standard IEC 61158-2 

Climatic conditions IEC 60721 

Ambient conditions 

Ambient temperature see table 2 

Storage temperature -40 ... 85 °C (233 ... 358 K) 

Shock resistance 

15 g , 11 ms 

Vibration resistance 

5 g , 10 ... 150 Hz 

Mechanical specifications 

Connection type see table 2 

Core cross-section up to 2.5 mm 2 

Cable diameter see table 3 

Cable gland see table 2 

Housing see figures 1 ... 3 

Housing material 

R... DIN rail housing PA 6.6 

F2... aluminium housing 

ALSI12 (Cu) DIN1725 (Si 1,2%), anodised 

F6... stainless steel housing 

1.4404 (S316L) 

Protection degree 

R... DIN rail housing 

IP20 


IP67 


IP66 

Mass 

R... DIN rail housing 

380 g 


1800 g 


2450 g 

Mounting 

panel or DIN rail mounting 

Data for application in conjunction 

with hazardous areas 

Main cable (Trunk) 

Rated current 

≤ 2.5 A 

Outputs 

Voltage U o 32 V 

Current I o 45 mA 

Inductance L o 0.25 mH 

Capacitance C o 100 nF 

Statement of conformity 

TÜV 04 ATEX 2465 X 

Group, category, type of protection, ¬ II 3 G EEx nA [L] IIC T4 

temperature classification 

Directive conformity 



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

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Directive 94/9 EC EN 50021 





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Type code/order designation 

Type of housing 

F2 

F6 

R 

Field housing with 4, 6 or 8 outputs, aluminium 

Field housing with 4, 6 or 8 outputs, stainless steel 

without field housing, for mounting in cabinet on DIN rail 

Type of device 

JBSC Segment Protector with short-circuit power limitation 

Explosion protection method 

leave blank for general purpose applications in non-hazardous areas and Zone 2/Class I, Div. 2 

Number of outputs 

4 

6 

8 

Type of cable connection 

Fieldbus-independent: variants with field housing and cable glands or without field housing 

FF Field housing with plug connection for FOUNDATION Fieldbus 

PA Field housing with plug connection for PROFIBUS PA 

Connection of trunk cable 

similar to output cable resp. variant without field housing 

CG Cable gland, plastic, M20 

CGB Cable gland, nickel plated brass, M20 

CGS Cable gland, stainless steel, M20 

CGAB Cable gland for armoured cables, nickel plated brass, M20 

7/8S Plug connection 7/8", stainless steel 

M12B Plug connection M12 x 1, nickel plated brass 

M12S Plug connection M12 x 1, stainless steel 

Connection of output cable (spur) 

Variant without field housing 

COM Variant without field housing, plug-in terminals 

CG Cable gland, plastic, M16 

CGB Cable gland, nickel plated brass, M16 

CGS Cable gland, stainless steel, M16 

CGAB Cable gland for armoured cables, nickel plated brass, M20 

CG2 Cable gland, plastic, M20 

CGS2 Cable gland, stainless steel, M20 

7/8S Plug connection, stainless steel, 7/8" 

M12B Plug connection, nickel plated brass, M12 x 1 

M12S Plug connection, stainless steel, M12 x 1 

- JBSC - . . . 

A - B - C D . E . F . G 

Identification for assignment of the type code to the following tables 

Example: 


Segment Protector for cabinet installation on standard DIN rail, 8 outputs for FOUNDATION Fieldbus H1 and PROFIBUS PA, 

plug-in screw terminals: R-JBSC-8.COM 

Example: 

Segment Protector in field housing aluminium, trunk cable glands stainless steel, 6 outputs plug connection 7/8" stainless steel, 

pin assignment for FOUNDATION Fieldbus H1: F2-JBSC-6.FF.CGS.7/8S 

Note: Not all variants are available. For available variants please refer to the electronic configuration tool or contact 

your Pepperl+Fuchs representative. 




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Dimensions 

LED 

Connections 

Trunk 

Fieldbus terminator, 

switchable 

Connections Spurs 

217 

Shield brigdes 

DIN mounting rail 

64 

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

100 

Cable fixing 

with cable tie 

Mounting on 

DIN rail 

Figure 1: R-JBSC-* for cabinet installation on DIN rail, terminal connections see table 1 

258 

228 

240 

Function unit 

similar R-JBSC-* 

see above 

for fixing 

with screws 

M6 

x 

114 

9,5 

84 

(57) 

Earthing 

point 


SW 

Spurs 

Trunk IN 

Figure 2: F2-JBSC-* with aluminium housing, connection variants and dimensions see table 2 ... 4 

Trunk OUT 




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Function unit similar 

R-JBSC-* see above 

For mounting 

with screws 

M6 

320 

300 

280 

Y 

170 

Earthing 

point 

SW 

Spurs 

Trunk IN 

Trunk OUT 

Height of F6 housing: 86 mm 

Figure 3: F6-JBSC-* with stainless steel housing, connection variants and dimensions see tables 2 ... 4 

Electrical connection 


Table 1: Connection of terminals 

Terminals 

Function 

1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+ Output (spur) + 

1-, 2-, 3-, 4-, 5-, 6-, 7-, 8- Output (spur) - 

1s, 2s, 3s, 4s, 5s, 6s, 7s, 8s Output (spur) shield 

T i + Trunk IN + 

T i - Trunk IN - 

T is 

Trunk IN shield 

T o + Trunk OUT + 

T o - Trunk OUT - 

T os 

Trunk OUT shield 

T 

Trunk, shield bridge 

S 

Outputs, shield bridge 

PA 

Potential equalization 

The terminals T is and T os are connected internally with terminal T. 

The terminals 1s ... 8s are connected internally with terminal S. 

The terminals PA are connected with the external earthing point (versions with field housing only). 

Different connections of the terminals T, S and PA allow to choose different shielding concepts. 

Variants R-JBSC-*.COM have plug-in terminals. 




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Table 2: Variations of cable connections, housing types and temperature ranges 

Type of connection, 

identification F, G 

Type of cable connection 

Number of outputs 

(spurs) 

identification D 

4 6 8 

F2 housing, 

outside 

dimension 

"X" (mm) 

F6 housing, 

outside 

dimension 

"Y" (mm) 

SW 

(mm) 

Temperature 

range 

(°C) 

CG Terminals, cable glands plastic X X X 140 200 20 -30 ... 70 

CGB Terminals, cable glands nickel plated brass X X X 140 n.a. 20 -40 ... 70 

CGS Terminals, cable glands stainless steel X X – 140 200 22 -40 ... 70 

CGAB 

Terminals, cable glands nickel plated brass for 

armoured cable 

X – – 160 220 24 -40 ... 70 

CG2 Terminals, cable glands plastic X – – 140 200 24 -30 ... 70 

CGS2 Terminals, cable glands stainless steel X – – 140 200 24 -40 ... 70 

M12B Plug connection M12 x 1, nickel plated brass X X X 135 195 n.a. -25 ... 70 

M12S Plug connection M12 x 1, stainless steel X X X 135 195 n.a. -25 ... 70 

7/8S Plug connection 7/8", stainless steel X X X 135 195 n.a. -40 ... 70 

without field housing Terminals 

(R-JBSC-*) 

X X X n.a. n.a. n.a. -50 ... 70 

Table 3: Cable diameter depending on cable gland 

Type of connection Cable diameter (mm) 

identification F, G 

CG 5 ... 10 

CGB 5 ... 10 

CGS 5 ... 10 

CGAB 

8.5 ... 16 outside 

6 ... 12 inside 

0 ... 1.25 armour 

CG2 7 ... 12 

CGS2 7 ... 12 

Table 4: Pin assignment of plug connections 

Outputs 

Trunk OUT 

Trunk IN 

Outputs 

Trunk OUT 

Trunk IN 

3 

4 

4 

3 

3 

1 

1 

3 

2 

1 

1 

2 

4 

2 

2 

4 

Plug connection M12 x 1 Plug connection 7/8" 

Pin PROFIBUS PA FOUNDATION Fieldbus 

1 PA+ Data- 

2 n.c. (GND) Data+ 

3 PA- Shield 

4 Shield n.c. (GND) 

Note for connector variants: 

Outputs (spur, trunk Out) are always sockets (female). 

Trunk IN is always plug (male). 


Installation note 

see manual 

Accessories 

Socket M12 x 1: blind plug VAZ-V1-B 

Socket M20: bind plug CG EX PLUG MT 20X 

Socket 7/8": blind plug V9-R-F-COV 




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JBSC - Auser

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