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6175 795 - 03
WAGO Gateway Installation and Service
Establishing the CAN Bus Connection
Installation
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The Viessmann CAN bus is designed for “line” bus
topology with a terminator at both ends (accessories).
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With CAN bus, the transmission quality and the cable
lengths depend on the electrical properties of the cable:
– Only use cable types listed in the following table.
– Only use one cable type within a CAN bus.
Recommended cable type (on site):
CAN bus cable
In line with ISO 11898-2, twisted pair cable, shielded
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Cable cross-section
0.34 to 0.6 mm
2
(22 to 18 AWG)
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Characteristic impedance
95 to 140
Ω
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Max. length
650 ft. (200 m)
Alternative cable types (on site):
CAN bus cable
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Max. length
2-core, CAT5, shielded
165 ft. (50 m)
CAN bus cable
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Max. length
2-core, CAT7, shielded
650 ft. (200 m)
