VT591 / Leak sensor & WLC / Leak detection cable

Function and purpose

Product page: https://vutlan.com/analog-sensors/91-vt591-leak-sensor.html

Datasheet page: https://vutlan.atlassian.net/l/cp/FxCBogKP

The sensor detects water by the drop in resistance of the water detection cable. The sensor must be used together with:

"WLC / Water leak cable" is ordered separately! When water is in contact with the detection cable resistive sensor indicates the emergence of moisture. The whole area can be effectively monitored by placing the cable near or along with possible flood sources.

Order options

If you need 18m WLC cable, you can connect together WLC3 + WLC15.

Model	Description
WLC3	WLC / Leak detection cable length is 3m.
WLC6	WLC / Leak detection cable length is 6m.
WLC10	WLC / Leak detection cable length is 10m.
WLC15	WLC / Leak detection cable length is 15m.
WLC25	WLC / Leak detection cable length is 25m.
WLC50	WLC / Leak detection cable length is 50m.

Dimensions

Usage examples

Technical specifications

VT591 / Water leak sensor specifications
Dimensions	60×18×18 mm
Weight	60 g
Input	2 wire (WLC cable)
Detection	Resistive
Output	RJ11 (6p4c)
Operating temperature	-10 °C to +80 °C
Operating humidity	5% to 95% (Non-Condensing)
Mounting	Mounting bracket included.
Power consumption	60mW
Max. distance m	100 m
HS Code	9025 80 400
Components	Manufactured in E.U.
Special features	Response time: 15 sec., Recovery time: Depends on how fast the sensor dries out

WLC / Water leak cable specifications
Description	WLC can work in high humidity, pollution, and hazardous waste
Detectable liquids	Clean, polluted & distilled water; acids; alkalis; alcohols, and other electrically conductive liquid
Diameter	6.5 mm in diameter
Lengths	Order options include 3m, 6m, 10m, 15m, 25m, 50m, or custom length.
Weight	36 g/m
Operating humidity	0% - 95 %
Max. storage temperature	75°C
Max. cable length	100 m
Inputs	x2 wires

Package content

Package includes:

	Description	Quantity
1	VT591 sensor	1 pc
2	"RJ 6P4C" to "RJ 6P4C" cable 2m	1 pc
3	Screw B4,2*16	1 pc
4	Sticker	1 pc
5	Flood adapter cable	1 pc

Connecting WLC / Water leak cable

Do not do illustration	Description
	The cable can not touch itself. It needs to be straightened.
	Do not twist or press down the cable too much. This may lead to deformation. The cable has two sensing wires, these wires can not touch each other.
	Do not put the cable on a conductive surface.
	You can cut the cable, but you need to isolate the ends so that they do not touch each other. And do not loop the cable.

Connect the "VT591 / Water leak sensor" to the monitoring unit. The connection is plug-an-play.
Connect the terminal cable to the VT591 sensor.
Connect "WLC / Water rope" to terminal cable.
Connect any additional "WLC / Water leak cables" to each other as shown in the picture above to make a chain connection.
Wire the WLC rope around or under potentially leaking objects around the perimeter or under the raised floors.
Put a protective cap on the connector of the last WLC cable in a chain.
The sensor is ready to use.

Analog sensor connection

This section includes child pages:

Connecting analog sensors

Connect the analog sensor by a supplied RJ-11 (6P4C) cable to any analog port "A1 .. A8" or "Sensor" port. The determination of the sensor type and connection will occur automatically.

Vutlan analog sensor connection (Analog ports).jpg

If strong electromagnetic interference is present, we recommend using a 3-pair cable CAN FTP for sensor connection!

6P4C RJ11 cable wiring/pinouts

1- Orange, 2- White Blue, 3- Blue, 4 - White Orange

Colors are true for this telephone cable. Both ends match the colors and pinouts (identical).

Please refer to the RJ connectors comparison table:

Maximum cable length test

ok = tested

x = failed

Model		50m	100m
VT407	AC current converter	ok recommended	ok
VT410	DC voltage monitor	ok
VT420	Converter 4-20mA	ok recommended	ok
VT500	Temperature sensor	ok	ok
VT501	Outdoor temperature sensor	ok	ok
VT510	Humidity sensor	ok	x
VT530	Access sensor		ok
VT540	Vibration sensor		ok
VT550	Wind velocity meter	ok	x
VT560	Smoke detector		ok
VT570	PIR sensor		ok
VT590	Spot water detector		ok
VT591	Water leak sensor		ok

Extending the number of analog sensors

Using CAN extension "VT408 / Sensor extension unit" it is possible to increase the number of analog sensors connected to the monitoring unit up to 80 sensors.

Analog sensors using CAN bus (Vutlan).jpg

Chain connection of analog sensors

This procedure applies to the following sensors, which are supported by the appliance and are connected to the analog ports:

Analog sensors	Daisy chain
VT500 / Temperature sensor	□
VT501 / Outdoor temperature sensor	□
VT510 / Humidity sensor	□
VT520 / AC Voltage detector	□
VT520DIN / AC Voltmeter	□
VT530 / Access sensor	■
VT540 / Vibration sensor	□
VT550/ Wind speed meter	□
VT560 / Smoke sensor	■
VT570 / PIR sensor	□
VT572 / Radar motion sensor	□
VT591 / Cable leak sensor	□
VT593 / Spot leak sensor	□

VT530 and VT560 are the only analog sensors that allow non-addressable chain connection. All the sensors in one chain are seen by the system as one sensor. One chain can have up to 10 sensors. Example of such connection:

Additional articles of interest

Sensor configuration

Adding logic schemes

How to test the sensor & sensor cable

Connect the WLC cable to VT591. Connect VT591 to the analog port of the system. The sensor should appear in the Vutlan Web Interface >> “System tree” panel >> “System group” tab >> “Autodetect” sensors. Make sure that the WLC cable is straight or not contacting itself, or any conducting material. The sensor should appear in the system as “Normal” (if the behavior is set to “Normal”), which means that there’s no presence of liquid (the two yellow wires along the WLC cable are not cables shorted).
Take a rag and wet it a little. Touch the rag to both yellow ires on the WLC cable. This should shorten the contact. The VT591 sensor should change the state to “Alarm”.
Dry the cable carefully with a dry cloth.

Installation examples

Please find installation examples in our articles "Water leakage detection using cable sensor and spot sensor" and "Leak detection under raised floors in data centers".

Cable layouts

Cover the whole area

Comprehensive protection for critical areas

Cover the edge area

Prevent leaks from immersing in or spreading out

Covering air-conditioned areas

Key protection against major leakage sources such as alr conditioners

Cable pinouts

The sensor uses a standard Vutlan analog sensor cable(RJ11/RJ12 to RJ11/RJ12) for connecting to the monitoring unit. You can find further instructions at the Analog sensors connection

Technical support

The device does not contain any user-serviceable parts. If the power meter requires service, contact your local sales representative. Do not open the device. Opening the device voids the warranty.

Schematics / Sensitivity adjustment

You can change the R10 resistor using the following schemes.

For example, if your room has very high humidity and the cable is in an alarm state without the spilled liquid being present, you can change R10 to 270k. This should lower the sensitivity level.

Troubleshooting

The following table describes potential problems and their possible causes. It also describes checks you can perform or possible solutions for each. After referring to this table, if you cannot resolve the problem, contact your local Vutlan sales representative for assistance.

Potential Problem	Possible Cause	Possible Solution
The data being displayed is inaccurate or not what you expect.	Incorrect setup values.	Check that You use the correct f(x) formula
	Incorrect voltage inputs.	Check power meter voltage input terminals to verify that adequate voltage is present
	The power meter is wired improperly.	Check that all wires are connected correctly and that they are energized. See “Wiring Diagrams” of the device.
The sensor does not appear in the Vutlan monitoring interface	Communication lines are improperly connected.	Check the 6P4C RJ11 communication cable.
	The communication cable is inserted into the wrong port.	6P4C RJ11 communication cable must be inserted into the analog port of the Vutlan monitoring system.
The sensor is always in alarm state.	The cable touches itself.	The cable can not touch itself. It needs to be straightened. Please check if the cable is bent anywhere.
	The cable is twisted or pressed down too much.	Do not twist or press down the cable too much. This may lead to deformation. The cable has two sensing wires, these wires can not touch each other.
	The cable is located on a conductive surface.	Do not put the cable on a conductive surface.
	The cable is damaged	Check the continuity of the cables with a multimeter. Let’s call each wire A and B: If the cable is not damaged, you should get the following results A-A: there’s a continuity. (I thinks it’s good) A-B: there’s a continuity. (I think there shouldn’t be any) B-B: there’s a continuity If the cable is damaged, you will get: A-B: there’s a continuity. There should not be a continuity. The wires cross each other somewhere. or B-B or A-A: no continuity (the wire is damaged).

Copyright:

Vutlan s.r.o. (LLC)

Remote Infrastructure Monitoring and Control

43 ul.Svornosti, 821 06 Bratislava,

Slovak Republic

www.vutlan.com