Rockwell Automation 1787-GEN2SKIT, -2, -3, -4, -5, -6, -7 DeviceNet Starter Kit User Manual - Manual (Page 37)

Publication DNET-UM003A-EN-P - August 2000
Construct Your Starter Kit 2-15
Ground Your Network You only need to ground a flat media DeviceNet network at one
location. Follow the guidelines below:
•
Ground the V- conductor at one place.
•
Make this ground connection with a 25 mm (1 in.) copper braid
or a #8 AWG wire up to a maximum 3m (10 ft) in length.
•
Use the same ground for the V- conductor of the cable system
and the chassis ground of the power supply. Do this at the
power supply.
Set up the 1771-SDN
Scanner for SKITs 3 and 4 The scanner is the DeviceNet master (controller interface)
coordinating all control data to and from all devices on the DeviceNet
network. This DeviceNet data is transferred between:
•
the SLC-500 and 1747-SDN via M1/M0 and discrete I/O transfers
•
PLC-5 and 1771-SDN via block transfers and discrete I/O
transfers
•
PCIDS and logic engine (such as SoftLogix 5 or your own
application) via I/O Linx driver running in the NT kernel
This data is then used in the ladder logic program to do the actual
control logic.
Wire
Color Wire
Identity Usage
white CAN_H signal
blue CAN_L signal
black V- power
red V+ power
Flat media
CAN_H
CAN_L
V-
V- V+
V+
41677
power supply