CAN AND RS485 BUS TOPOLOGY
NOTE:
See the website www.can-cia.org for information about the CAN bus, specifications, etc.
13.2.1. Wiring examples
1. For shorter distances (all network components within one room) – picture 1
interconnect A and B; shielding connect to PE on controller side
2. For longer distances (connection between rooms within one building) – picture 2
interconnect A, B, COM; shielding connect to PE at one point
3. In case of surge hazard (connection out of building in case of storm etc.) – picture 3
We recommend using the following protections:
• Phoenix Contact (http://www.phoenixcontact.com): PT 5-HF-5DC-ST with
PT2x2-BE (base element)(or MT-RS485-TTL)
• Saltek (http://www.saltek.cz): DM-006/2 R DJ
Recommended data cables: BELDEN (http://www.belden.com)
1. For shorter distances: 3105A Paired – EIA Industrial RS-485 PLTC/CM (1x2
conductors)
2. For shorter distances: 3105A Paired – EIA Industrial RS-485 PLTC/CM (1x2
conductors)
3. In case of surge hazard: 3106A Paired – EIA Industrial RS-485 PLTC/CM (1x2+1
conductors)
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