Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 15)

Chapter 2
Installing a Network
2–2
Power Requirements
Each workstation must be powered with 28V of AC power. This power is
supplied by the power supply (Catalog No. 2708-NP1, -NP2) which is a
sealed AC adaptor that is plugged into a wall outlet. The power output cable
is plugged into the power connector as shown in Figure 2. A full diagram of
all the connectors is shown in Figure 2.2.
Figure 2.2
Back Plate of the Workstation
BARCODE PWR 485 NET COM1 COM2
ALLEN-BRADLEY
MADE IN USA
In a normal installation, each individual workstation is powered by its own
power supply.
The RS-485 Network Bus
It is highly important to recognize that the network should be wired to appear
as a continuous cable or bus and should not be spliced in a manner that
allows the cable to make a 3-way junction. Figure 2.3 shows the right way to
wire a network.
Figure 2.3
Correct Network Connection
Network
Connector
Workstation Workstation Workstation
Simple Network