Pepperl+Fuchs HD2 Series - Connections; Installation Requirements for Ex IC Installations with MBHC-FB- 8 R.HSC.R

2014-10
20
Compact Fieldbus Power Hub,Generic Interface
Installation and Commissioning
Grounding
The motherboard is connected to the earth via designated screws.
If needed, an optional grounding rail can be applied.
The torque required for tightening the grounding screws: 1.5 Nm
3.4.1 Connections
3.5 Installation Requirements for Ex ic Installations with MBHC-FB-
8R.HSC.R*
If the fieldbus power hub is used with the right hand version of the motherboard MBHC-FB-
8R.HSC.R* in an intrinsically safe installation (Ex ic), ensure that the following installation
requirements are fulfilled:
Host Connection with Spring Terminal
+ Segment +
- Segment -
S Shield connection
+-S
1 Primary bulk power connection with mounted connector cover for Ex ic installations
2 Host connection
3 Secondary connection with mounted connector cover for Ex ic installations
4 Common alarm voltage-free contact with final motherboard link (The alarm contact has
to be looped at the last motherboard)
5 Diagnostic bus connection
6 Connections for fieldbus trunk
7 Diagnostic link cable ACC-MB-HDC
1
2
4
5
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3