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CAN sensors and CAN units connection
Connect CAN devices to any port CAN1 or CAN2 on the monitoring system using a cable supplied. CAN sensors can also be connected to the port of another CAN sensor or CAN unit that is connected to the CAN bus. Determination of the devices and their connection is done through a web interface.
Info You can connect up to a maximum of x12 CAN sensors and CAN devices together on one CAN bus (approximately)!
If you want to connect more than x12 CAN units, you need to use CAN-12V-1A / CAN Power Supply
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You can connect up to x32 CAN units in a CAN bus chain. |
The TR should be "ON" for the last sensor on each bus "CAN 1" and "CAN 2". See section "TR" below.
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This procedure applies to the following sensors, which are supported by the appliance and are connected to the CAN ports:
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Read more about Setting up CAN sensors. |
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CAN cable and limited line length
The maximum length of the CAN line in Vutlan monitoring systems is 225 m due to limitations on the ohmic resistance of cables with RJ12 connectors.
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Vutlan AWG24 cables have low resistance. Since the conductivity of aluminum is much lower than that of copper, the resistance of CCA cables is much higher than that of pure copper cables of the same size. |
It is advisable to use two or three pairs of cables such as UTP Cat3.5.6 with 24AWG with a copper core. It is possible to use a 4-wire or 6-wire TRONIC or UTP CCA cable, but the maximum CAN line length will be reduced.
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Model | Description | 50m | 100m | 150m | 200m |
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VT408 | Sensor extension unit | ok | |||
VT408DIN | ok | ||||
VT430 | Rack control unit | ok | |||
VT440 | Dry contacts unit | ok | long-chain | ||
VT460 | Smoke, humidity, temperature | ok | |||
VT490 / VT490i | Dual humidity and temperature sensor / Pressure, humidity & temperature sensor | ok |
Additional power for long-chain
When connecting a very long chain, you need to use the CAN-12V-1A / CAN Power Supply module for an additional power for CAN units/extensions/sensors every 8-12 sensors.
x2 CAN port systems
Some Vutlan main monitoring systems have x2 CAN ports. That means they can support two individual CAN chains. Each chain has to be configured individually. E.g. “VT855t / Data center monitoring unit” has x2 CAN ports.
Additional reading
see also:
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see also: