Vision™ OPLC™, V570-57-T40B, V570-57-T20B, & V570-57-T20B-J
Installation Guide
8
Unitronics
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
CANLayer 2
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%, 121
R
, 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
Power Supply
+
-
+V
L
PE
H
+V
Circuit
protection
device
121
terminating
resistor
121
terminating
resistor
+V
L
PE
H
+V
+V
L
PE
H
+V
The information in this document reflects products at the date of printing. Unitronics reserves the right, subject to all applicable laws, at any time, at its sole
discretion, and without notice, to discontinue or change the features, designs, materials and other specifications of its products, and to either permanently or
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DIG-V570-TX0B 06/09
i4 Automation Ltd - 01480 395256
