Canbus Wiring Specifications; Figure 10. Canbus Wiring Diagram - Unitronics Vision 230 User Manual

CANbus Wiring Specifications

Table 2: CANbus Specifications
Power Requirements:
Galvanic Isolation
between CANbus and
controller:
Max. Network Cable Length:
1 Mbit/s -
500 Kbit/s -
250 Kbit/s -
125 Kbit/s -
100 Kbit/s -
50 Kbit/s -
20 Kbit/s
Note: If you require cable lengths over
500 meters, contact technical support.
Table 3: Wiring Considerations
•
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
•
Maximum number of controllers in a
network: 63
24VDC (±4%),
40mA max. per unit
Yes
25 m
100 m
250 m
500 m
500 m
1000 m
1000 m
Chapter 5: Communications
24V Power
Supply
-
-V
L
PE
H
+V
-V
L
PE
H
+V
-V
L
PE
H
+V
121
terminating
resistor

Figure 10. CANbus Wiring Diagram

Circuit
protection
device
121
terminating
resistor
21