Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 305)

16–2 Communicating with AdaptaScan Bar Code Readers via DeviceNet Peer-to-Peer Protocol
Publication 2755-6.8
The following illustration shows the nodes of the DeviceNet
peer-to-peer network. Peer-to-Peer communications allows a single
reader to gather data from the other readers over a DeviceNet
network. The reader then transfers the data to the computer over an
RS-232 link.
Reader Reader Reader
Computer
DeviceNet
RS-232
In the illustration the next page, each reader is powered by a separate
Catalog No. 2755-PW46 or -PW47 power supply. The Catalog No.
2755-PW46 is shown. Do not connect power supplies in parallel.
Use a shielded cable (Belden 9316 recommended) when making
power connections.
Note: You must ground V- to Earth Ground at a single point on the
power supply link, preferably as near the power supply as possible.
Ensure that the V+ lines are not connected together and that the V–
lines are connected together as shown on top of next page.
Connecting to the
DeviceNet Network
Connecting a Power
Supply to a Reader