Can Interface - HBM MP85A Series Operating Manual

Electrical connection
If you are operating several devices in one Ethernet network, we recommend
the use of an industrial Ethernet switch. If the devices are to be connected to
the company network, we also recommend the use of a managed switch, as
experience shows that these (higher quality) devices are less susceptible to
disturbances. The network with the measuring instruments and any PCs
integrated in it are then connected to the company network via the managed
switch.
In order to achieve the best possible separation between the network
containing the measuring instruments and the rest of the company network,
you can also use a router that separates both networks and only transmits
messages between the two networks when necessary.
5.7.2

CAN interface

The CAN bus is connected via screw terminal 1. A maximum of 32 CAN nodes
can be connected in one bus segment (as per CANopen specification).
The CAN bus requires a termination resistor of 120 Ω in the first and last bus
nodes. The bus line can have two termination resistors maximum. The MP85A
process controller has an integrated termination resistor, which you can enable
using toggle switch S2.
Low
High
1st device
Fig. 5.14 CAN interface connection
42 MP85A
A0293_06_E00_03 HBM: public