This section includes child pages:
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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
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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
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:
CAN sensors, and modules:
CAN extensions:
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Read more about Setting up CAN sensors. |
Used cable and limited line length
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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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TR termination switch
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The last sensor TR switch on a CAN chain must always be terminated, ( switched ON ). Sensors on a CAN bus that is in the middle should have TR switched OFF. |
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Only older Vutlan models have an FR switch. |
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pic.1.1: FR is OFF, TR is ON. pic.1.2: FR is OFF, TR is OFF.
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The green LED "CAN status" of the device will light up.
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Go to the panel "System Tree" to see the new devices or new sensors. The article numbers for CAN devices are VT4xx. If they do not appear, wait, or refresh.
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If after clicking the "Configure" button the poll is reset to the phrase "Update", then the line is not connected or the terminators on the bus are not agreed. It is necessary to check and change the condition of the TR terminators (See "TR termination switch" section above) on the modules or check and possibly change the connection cables. |
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Warning: If the bus is not matched, that is, there are bad contacts or bad cables, or the TR terminator is in the"ON" position on the intermediate devices (position 2 on the VT408), or the line is too short for matching on both CAN end devices, CAN on this line can work malfunctioning, or the line as a whole may not function. (CAN line failure may occur if the parallel CR switch is in state 1, must be in OFF). |
LEDs
CAN sensors have LEDs that indicate the following states:
Red continuous light, green flickers - no communication with the master module
Red continuous light, green is off - there is a connection with the master unit but is not included in the monitoring system (not configured)
Red is off, Green continuously light - work as part of a monitoring system
All LEDs are off: no power or sensor is defective.
Maximum cable length test
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 CAN-12V-1A / CAN Power Supply module for an additional power for CAN units/extensions/sensors every 8-12 sensors.
see also:
| Child pages (Children Display) |
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