Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 306)

16–3 Communicating with AdaptaScan Bar Code Readers via DeviceNet Peer-to-Peer Protocol
Publication 2755-6.8
Reader 2 Reader 3 Reader 1
Other
DeviceNet
Devices
24V+ V- 24V+ V- 24V+ V-
Ground Screw
on Wiring Base Ground Screw
on Wiring Base
Ground Screw
on Wiring Base
Ground Screw
on Wiring Base
Ground V- at
One Place
See DeviceNet Cable System Planning and Installation Manual
(Publication No. DN-6.7.1) for recommendations and accessories.
Multiple Reader Connections using Other Power Supply
Below all readers are powered by another power supply. Use a linear
unregulated power supply. The supply must provide 14 watts of
power to each reader. 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.
User
Specified
Unregulated
Linear Power
Supply
Reader 2 Reader 3 Reader 1
V-
V+
Other
DeviceNet
Devices
Ground
Screw
Ground V- at
One Place
See DeviceNet Cable System Planning and Installation Manual
(Publication No. DN-6.7.1) for recommendations and cable
accessories.