Siemens DataNET Hub (DNH) - Manual (Page 37)

2000585-001 Installation •••• 29
DataNET Copper Connections
The DNH consist of two identical hubs in one enclosure. The left side is
usually the DataNET ‘A’ Hub and the right side is the DataNET ‘B’ Hub.
Each hub contains two DataNET Hub boards and power supplies. Figure
2-1 shows the layout of the DataNET Hub board. All port connections are
made to the port connectors located on each communication board.
The DataNET ports can accept copper and/or fiber optic cables. In Data
Hiway installations the DNH can use the existing Data Hiway cables.
Only the Ethernet port on the ‘A’ Hub is active. The cable connection be-
tween the two halves determines which is the ‘A’ or ‘B’ Hub half. See
illustration below. A jumper wire visible across pin 1 and pin 2 on the ca-
ble connector (J14) indicates that this side is the ‘A’ Hub half.
CROSS LINK CABLE JUMPER
PINS 1&2
‘A’ HUB
‘B’ HUB
1. The wiring method (conduit or cable glands) and cable type you use
for the installation is dependent upon the site requirements. Review
the Site Wiring Requirements. Table 2-1 (page 19) to determine the
requirements for your site.
2. Make a block diagram of your existing or proposed network. The
block diagram should show all devices and the placement of the
DNH. If copper cable is being used, the diagram should show the es-
timated cable lengths for each run. This information will be neces-
sary in determining if any DataNET Hub Signal Equalizer Boards are
required (see page 34).
3. Read through this section to familiarize yourself with port locations,
terminal and jumper assignments, and wiring procedures. Refer to
Figure 2-1 DNH Communication Board Layout.
Description
A & B Hubs
Before You Begin