Siemens DataNET Hub (DNH) - Manual (Page 9)

2000585-001 Introduction •••• 1
Chapter 1
Introduction
Overview
The Advance DataNET Hub (DNH) functions as a communication router
on an Advance Communication System (ACS) network. The DNH is a
fully redundant unit with dual electronics and with dual power supplies.
The electronics are certified for use in NEC Division 2 and IEC (Cenelec)
Zone 2 hazardous locations.
The dual hub modules (designated DataNET ‘A’ Hub or DataNET ‘B’
Hub) are connected via a serial cross-link cable The wiring of the serial
crosslink cable determines which is the ‘A’ Hub.
HUB ‘ B’
HUB ‘ A’
The DNH brings flexibility to the ACS with its eight DataNET downlink
ports, one Ethernet 10BaseT port for interconnecting of DataNET or
Ethernet segments and one uplink port. With its uplink port, the DNH can
be used to connect DNHs together to expand the ACS network, or the
DNH can be used as an interface to an Advance Network Gateway unit.
The DataNET ports can accept copper and/or fiber optic cables. In Data
Hiway installations the DNH can use the existing Data Hiway cables.
Description
Dual Hub Modules
I/O Ports