Unitronics UniStream Installation Manual page 8

CPU-for-Panel Installation Guide
CANbus
Use the CANbus port for all CANbus communications including integration of Remote I/Os
via EX-RC1.
The CPU-for-Panel is shipped with a 5 pin CANbus terminal block. This connector is
marked with a pin assignment that is identical to the corresponding marking on the CPU-
for-Panel.
CANbus Wiring
+V CANbus Power Supply (see Note)
H CAN High
Functional Ground
L CAN Low
-V CANbus Power & Signal Common
 Use a shielded twisted-pair cable.
DeviceNet ® , shielded twisted-pair cable
is recommended.
 When wiring each node, connect the
cable shield to the functional ground
point of the CANbus terminal block.
 Connect the CANbus cable shield to the
system earth at only one point near the
power supply.
The CPU-for-Panel CANbus port is
N
OTE
internally powered and does not require
an external power-supply. This means
that you can either connect the +V point
in the CPU's CANbus connector to an
external power supply, or leave it
unconnected.
Do not use the +V point for any other
purpose.
CANbus Termination
Place termination resistors at each end of
the CANbus network. Resistance must be
set to 121Ω, 1/4W, 1%.
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