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3.5.11 CAN-bus connection
3.5.11.1
CAN connection
Remarks:
1.
The
CAN
network
Figure 3.22 shows how to connect it on your network
2.
CAN signals can sustain up to +/-36V without damage.
3.5.11.2
Recommendation for wiring
a)
Build CAN network using cables with twisted wires (2 wires/pair), with CAN-Hi twisted together with CAN-Lo.
It is recommended but not mandatory to use a shielded cable. If so, connect the shield to GND. The cable
impedance must be 105 ... 135 ohms (120 ohms typical) and a capacitance below 30pF/meter.
b)
Whenever possible, use daisy-chain links between the CAN nodes. Avoid using stubs. A stub is a "T"
connection, where a derivation is taken from the main bus. When stubs can't be avoided keep them as short
as possible. For 1 Mbit/s (worst case), the maximum stub length must be below 0.3 meters.
c)
The 120Ω termination resistors must be rated at 0.2W minimum. Do not use winded resistors, which are
inductive.
Technosoft 2022
Figure 3.26. CAN connection
requires
a
120-Ohm
Figure 3.27. Multiple-Axis CAN network
31
terminator.
This
is
iPOS360x BX-CAN Technical Reference
not
included
in
the
drive.
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