CAN-12V-1A / CAN Power Supply

Documentation page: https://vutlan.atlassian.net/wiki/spaces/DEN/pages/1904279553/CAN-12V-1A+CAN+Power+Supply

Product page: https://vutlan.com/can-sensors/150-CAN12V1A.html

Function and purpose

The additional power supply is needed only if the number of sensors in a CAN bus chain is more than 12 sensors. Supplies power for each additional group of 12 sensors.

Technical specifications

Communications	Description
Type	Power supply for CAN bus chain
Input	RJ11 6P4C CAN port ⌀3.4/1,35 mm 12V
Output	RJ11 6P4C CAN port
Daisy chain	Allows daisy chain
Max. qty of CAN sensors powered:	15
LED indicators:	Green (Status On/Off)

Environmental
Working temperature range:	−40 °C to +100 °C
Humidity operating range:	0-95% RH

Power Requirement
Power input:	12V DC, min. 1A, max.2A

Mechanics
Dimensions:	68 x 67 x 26,2 mm (LxWxH)
Packaging weight:	190 g
Mounting options:	Desktop, Wall mount, Indoor

General
Manufactured in:	Slovak Republic, European Union
Manufactured by:	Vutlan s.r.o.
HS code:	8504 40 90
Warranty:	90 days

Physical description

1. "Power 12V DC" - power input.

2. "INPUT" - This port should be connected to a group of sensors towards the main monitoring unit.

3. "OUTPUT" - This port should be connected to a group of sensors further away from the monitoring unit.

4. LED: "Status" (green) - indicates that the appliance is connected and operating.

Please, read carefully the instructions about connecting the unit. Connecting CAN sensors to the wrong CAN port on this device may burn the CAN bus line.

Drawings

Connecting the device

Please read this article to the end before connecting the device. Connecting CAN sensors to the wrong CAN port on CAN-12V-1A may burn the CAN bus line.

Description:

In our example, we have a monitoring system with a group of sensors (group 1) connected to it. CAN-12V-1A is only needed if we want to connect to the monitoring unit with more than 15 sensors.

Step 1:

Plug CAN-12V-1A into the power supply socket using a Euro Schuko power adapter. The status LED should light GREEN.
Plug all additional sensors (group 2) into the "OUTPUT" port of the CAN-12V-1A power supply unit. Group 2 should have no more than 15 sensors connected in a chain.
All sensors should light ON. If some of the sensors do not switch ON, decrease the number of sensors connected to CAN-12V-1A, and check the status of each sensor again. If successful, continue to the next step.

Step 2:

Connect GROUP1's last sensor to the INPUT port of the CAN-12V-1A module.
Switch the last sensor's TR button to the OFF position in GROUP1. Switch the last sensor's TR button to the ON position in GROUP2.
You can now CONFIGURE the CAN bus in the web interface. See the "CAN Configuration" step below.

If you want to add more sensors, you will need to add an additional CAN-12V-1A module in a chain. The steps are identical for Step 1 and Step 2.

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.

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

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.

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:

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.

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.

TR termination switch

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.

FR should always be OFF.

TR switch is always the DP switch nearest to the CAN bus.

Only older Vutlan models have an FR switch.

pic.1.1: FR is OFF, TR is ON. pic.1.2: FR is OFF, TR is OFF.

Adding CAN modules and sensors

To connect the CAN module or CAN sensor to the CAN bus of the system, go to the interface >> CAN configuration panel >> Select the CAN1 or CAN2 tab (select the connected physical CAN1 or CAN2 port on the master module).

Click the "Configure" button and wait. The system will start CAN bus polling, soon it will display the data lines and write “Done!”. The modules and sensors connected to the CAN input will appear in a tab in the list. Click the Apply button and then Restart.

The green LED "CAN status" of the device will light up.

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.

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.

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	100m	150m
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 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

CAN configuration

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Packaging includes

Make sure that the contents of the delivery meet the following configuration. Report a missing or damaged component to your supplier. If damage occurred during transportation, contact the appropriate delivery service.

	Description	Quantity
1	CAN Power supply module	1 pc
2	RJ11 6P4C 2m CAN cable	1 pc
3	12V DC power supply	1 pc
4	Screws M3.5 10mm	2 pcs
5	Screws B3,5 13,5mm	2 pcs
6	Nuts M3.5	2 pcs
7	M3.5 washers	2 pcs
8	Self-adhesive sticker	2 pcs