Connections; Installation Requirements For Ex Ic Installations With Mbhc-Fb- 8R.hsc.r - Pepperl+Fuchs HD2 Series Manual

Compact Fieldbus Power Hub,Generic Interface
Installation and Commissioning
Host Connection with Spring Terminal
+ - S
+ Segment +
- Segment -
S Shield connection
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

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
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:
20
1 2
7
3
4
5
6