Unitronics Vision V280 User Manual page 12

CANbus
These controllers comprise a CANbus port. Use this
to create a decentralized control network using one
of the following CAN protocols:
▪ CANopen: 127 controllers or external
devices
▪ Unitronics' proprietary UniCAN: 60
controllers, (512 data bytes per scan)
The CANbus port is galvanically isolated.
CANbus Wiring
Use twisted-pair cable. DeviceNet® thick shielded
twisted pair cable is recommended.
Network terminators: These are supplied with
the controller. Place terminators at each end of the
CANbus network.
Resistance must be set to 1%, 121Ω, 1/4W.
Connect ground signal to the earth at only one
point, near the power supply.
The network power supply need not be at the end of
the network.
CANbus Connector
12
24V Power
Supply
-
-V
L
PE
H
+V
-V
L
PE
H
+V
-V
L
PE
H
+V
121
terminating
resistor
V230/280/290
+
Circuit
protection
device
121
terminating
resistor
Unitronics