LIQUID LEAK SENSOROPERATION MANUAL(Web Site Downloaded only)

For RS-3000 and RS-3500 Series,
as following models
Control Unit:
RS-3000C
Detection Unit:
RS-3000FA
RS-3000FAP
RS-3000FAP-S

RS-3500C
RS-3500FA
RS-3500FAP
RS-3500FAP-S* RS-3000 Series is designed for use in NPN configuration transistor circuit by its open-collector out put.,besides RS-3500 Series is used in PNP configuration. Both Series cannot be mutually substituted eachother for its out put signals.
** For the Operating information of Buzzer Alarm Leak Sensor of RS-3000 Series and RS-3500 Series, pleaserefer to the separate copy of the manuals. When Control Unit of RS-3000C/3500C will be applied for Buzzer
Alarm Leak Sensor, please refer this manual for the appropriate section, too.

UL Recognized: File No. E176923
CE Mark Compliance: EN61326

TOYOKO KAGAKU CO., LTD.
Components Business Division
370 Ichinotsubo, Nakahara-Ku,
Kawasaki City, Kanagawa Pref.
211-8502, JAPAN
Phone: (044)435-5860

Fax: (044)434-9091(Patent. 1783360)

MAN-RS3035-06.2012 Revised

Introduction
We appreciate that you have chosen our Liquid Leakage Sensor.
Before you install or operate it, please read this operation manual thoroughly, and follow the instruction inorder to avoid any accidents, malfunction, defects and hazards.
Please keep this manual with good care as long as the sensor is being operated.

Table of Contents
1. Designation of Sensors················································································· 3
1-1. Control Unit RS-3000C, RS-3500C···························································· 3
1-2. Detection Unit RS-3000FA/FAP/FAP-S, RS-3500FA/FAP/FAP-S ·················· 3
2. Installation ··································································································· 42-1. Detection Unit RS-3000FA / RS-3500FA ···················································· 42-2. Detection Unit RS-3000FAP/FAP-S, RS-3500FAP/FAP-S ···························· 42-3. Control Unit RS-3000C / RS-3500C··························································· 6
3. Wiring Instruction ························································································· 7
3-1. Detection Unit Stand-alone Application without Control Unit ····················· 7
3-2. Detection Unit: Combination Application with Control Unit························ 8
4. Operation ····································································································· 94-1. Detection Unit Stand-alone Application without Control Unit ····················· 94-2. Detection Unit Combination Application with Control Unit························· 94-3. Distinction of the abnormal status ··························································10
5. Resetting after the Leak Detection ································································116. Specification ·······························································································126-1. Control Unit···························································································126-2. Detection Unit························································································12(1) RS-3000 series ·····················································································12(2) RS-3500 series ·····················································································13
6-3. Bracket ·································································································13
7. Outlook and Dimensions ·············································································14

1.Designation of Sensors
1-1. Control Unit: RS-3000C, RS-3500C
LED – Status: Leak (Red)× 8 points

LED – Status: Normal (Green)× 8 points,(Top View)

LED – Power: ON (Green) × 1 point

Detection Unit
Input, Port, 8 sockets

Dip Switch

Power & Output(No Socket)(Right Side View)(Left Side View)(Front View)

Two Holes for screw down on the surface.

Attachment for installing to DIN Rail

(See page 6, 4. Installation)

1-2. Detection Unit: RS3000FA/ FAP/ FAP-S*, RS-3500FA/ FAP/ FAP-S*
Indicator Lamps
Green, Red

Cable with 3 wires:
OD 2.29 +/- 0.25mm

Normal Status: Green

Length: 2m

Leak & Wrong position**: Red(* For the model with “-S” suffix,
please see Note below)

Body
Absorbent Paper (P/N-6411)
Not applied for RS-3000FAP and RS-3500FAP

Bracket*Note: ”-S” suffix is designed to omit the feature of Wrong Position Sensing from standard features. Even all the dimensions andtechnical designs are identically same as standard models, but the alarming function by wrong positioning has been omitted. Then thealarm signal of this “-S” model is limited clearly generated by liquid leak detecting. This concept would be accepted by such, “Single
purpose should be assigned to a single alarm signal” Therefore “-S” feature has becomes one of optional function in RS-3000 series.
33

2. Installation
2-1. Detection Unit: RS-3000FA / RS-3500FA(１) Place the Bracket of the Detection Unit on the surface where you want to detect the leakage, andfix it firmly.
* Use the correct Bracket for the detection Unit. Refer to page 8 [Bracket Specification].
(2) Place a piece of the Absorbent paper onto the Bracket.
NOTE: Be assured not to use 2 or more pieces of the Paper at a time in the Bracket.
(3) For mounting the Sensor Body, push it into the Bracket completely.
NOTE: Verify that the Body has fixed entirely and it does not hook up at intermediate height in the
Bracket.

Sensor Body

Absorbent Paper

Bracket for the Paper Use P/N-6440

2-2. Detection Unit: RS-3000FAP / RS-3000FAP-S / RS-3500FAP / RS-3500FAP-S(1) Place the Bracket of the Detection Unit on the surface where you want to detect the leakage, andfix it firmly.
* Use the correct Bracket for the detection Unit. Refer to page 12 [Bracket Specification](2) For mounting the Sensor Body, push it into the Bracket completely.
NOTE: Verify that the Body has fixed entirely and it does not hook up at intermediate height in the
Bracket.
NOTE: Do not use any absorbent paper for these models for Paperless application.

Sensor Body

Do not use the adsorbent Paper

Bracket for Paperless P/N-6430

4

NOTE: When the sensor is located at the position, align the direction of the detection unit
against the Bracket as described below.
And make sure that the location of the sensor will not have any objections formaintenance job、 or the direction of the cable heads for no obstructions where the cable
may not be damaged by excessive bent or pressure.

Bracket P/N-6440

For Detection Unit RS-3000FA / RS-3500FA

Bracket P/N-6430

For Detection Unit RS-3000FAP / RS-3000FAP-S /RS-3500FAP / RS-3500FAP-S

5

2-3. Control Unit RS-3000C / RS-3500C
The Control Unit can be installed on either a DIN Rail or the plane surface.
(1) Install the Control Unit into the DIN Rail as below.

(2) When DIN Rail is not applied, install the unit on the surface directly to be fixed using two of thescrew as below.

63. Wiring Instruction
3-1. Detection Unit Stand-alone application without Control Unit
Both of RS-3000 and RS-3500 Detection Unit have the same wire allocation as below:
RS-3000FA / RS-3000FAP / RS-3000FAP-S → Refer to NPN circuit configuration wiring;
RS-3500FA / RS-3500FAP / RS-3500FAP-S → Refer to PNP circuit configuration wiring:(1) The Detection Unit has a 3-wire sheath cable by 2 meters long (as a standard length)
When you extend the cable length for your electric system, do not exceed 30 meters long to comply with
its technical conditions of EN61326, which is our certified test conditions, too.
Each wire will be connected as below.

Red: Power DC +12V～24V
White: Output (Normal: ON)
Black: Power 0V(2) Connect the red wire (Positive pole) and the black wire (Negative pole) to the power source correctly.
White wire is for an open collector output.
NOTE: Do not miswire with DC power source each other.

NOTE; Use the sensor unit between the power voltages of DC12V to DC24V.
(3) The output capacity is limited up to 50mA maximum rating. Excessive rating may damage the output
circuit.
NOTE: When an inductive load may be applied, the protective treatment for the backelectromotive is recommended. The following sample chart shows a hint to add aprotective diode (F14C equivalent) to a relay coil load

Wiring Instruction: (Sample charts)
Please be careful to recognize the difference between both NPN and PNP wiring.

NOTE: Avoid short circuit between each wire after the power is supplied, otherwise the damage
may be happened.

7

3-2. Detection Unit: Combination application with Control Unit
RS-3000FA / RS-3000FAP, / RS-3000FAP-S will be connected to the control unit RS-3000C.
RS-3500FA / RS-3500FAP / RS-3500FAP-S will be connected to the control unit RS-3500C.
*Buzzer Alarm Sensor RS-3000*-BZ can be connected with RS-3000C as the same manner
instructed in manual. RS-3500*-BZ can be connected with RS-3500C, respectively.
Use the Plug connectors for wiring with the Control Unit. The Connector can be obtained in themarket by the keyword of “e-con” specification associated by Japanese connector suppliers. We
recommend to use OMRON, XN-2 Type connector for the connection as below:
For further information about XN-2 connectors, please visit web site of OMRON: URL www.fa.omron.co.jp/product/family/1728/index_p.html(1) Refer to the wiring information in the illustration below.

Detection Unit 1
Black Wire

Ｇ

4

White WireＳ

3

Red Wire

＋

2

／

1

N/A

G S
+ /

Input Socket １

Simultaneously 1ea to 8ea ofDetection Unit can be served
into the line of Input Sockets.

4
3

2

1

Detection Unit 8Black Wire

G

4

White Wire

S

3

＋

2

／

1

Red Wire

N/A

OUT

Input Socket ８

OUT

0

4

Relay Output *

3
0
2
24Ｖ
1

4
3

Power 0Ｖ
Power 24Ｖ

No Socket
To the Load of Signal
OutputTo ＤＣ24Ｖ Power Supply* The specification of the “Relay Output” of the Control Unit is one pole of SPST relay contact.

8

2

1

24V

4. Operation
WARNING： The following procedure must be implemented after wiring has been done, prior tooperation.

4-1. Detection Unit Stand-alone application without Control Unit
After installation and wiring works are completed, you may turn on the power for initial verification process.
At this moment, Green LED on the Detection Unit will light while the other Red LED is off. Now theSensor works as the output is ON status.
Next, you may proceed either following step of [1] Paper application, or [2] Paperless application, according
to your sensor product models:[1] RS-3000FA / RS-3500FA (Absorbent Paper is used)
For testing the models, the absorbent paper will be removed from the Bracket temporarily. The Detection
Unit is set again to check. The Red LED of the Detection Unit will light and Green LED goes off. The
output becomes OFF simultaneously. It is correct appearance.
After the verification of this check, the absorbent paper must be set again.
The sensor is now set good conditions for use.
[2] RS-3000FAP / RS3000FAP-S / RS-3500FAP / RS-3500FAP-S (No paper is used)
To check the alarm status, just pour a drip of water to the Detection Unit, rather to the Absorbent paper.
Upon the water is absorbed into almost whole area of the absorbent paper, the LED of the Detection Unit
will be switched from Green to Red. The output will become OFF status simultaneously. This is thecorrect alarm status.
After the check, wipe off the water remaining completely, and set again the Detection Unit in the Bracket.

4-2. Detection Unit Combination application with Control Unit
(1) After installation and wiring works are completed, you may turn on the power, then, set the position ofeach Dip Switch of the Control Unit. The detailed function is described in the chart on next page.
[Adjusting of Dip Switches]
Put the adequate number of the Dip Switch ON position same as the selected number of the input port of
the Control Unit. For example, 5 of the Detection Unit are connected to the input port of 1 through 5, theDip Switch of 1 through 5 must be turn ON position and other rest of 6 to 8 must be OFF position.
In case that the selected number of the Dip Switch may be OFF in spite the Detection Unit is connected at
the same input number, the output signal from the Detection Unit will not be recognized, then both of theGreen and Red LED Display on the Control Unit remain unlit.
(2) Verify the status of all the Detection Unit connected in the Control Unit as the same way described in theabove 4.1 section.
(3) When the Detection Unit shows Red LED on, and its output is OFF, the LED Display of the Control Unit
shows Red (Alarm) on for the selected number of Input Socket, and Relay contact of the output is OFF, as
the Close status of relay contact.
When all the Detection Unit shows Green LED, the Relay contact of the Control Unit is ON, as the Openstatus.

9

Connection and Status Reference Chart
Input
No
n

LED Indicator of
Dip Switch
LED Display
Relay Out
Detection Unit
1
Green ONn = Green ON OFF = CloseRed ON2n1) Leakage
n=ON
n = Red ON
ON = Open
2) Wrong position***3n
Not Connected
n = Red ON
ON = Open
4n
Not Connected
n=OFF
n = blank
OFF=Close* “n” represents selected input socket numbers from 1 to 8 of the Control Unit.
** If the correspondent number of the Dip Switch may not be set correctly, the Relay output will not
function accurately.
***This function is not applied to the “-S” suffix models. This model only outputs the alarm when
the liquid is detected.

4-3. Distinction of the abnormal status(1) When the LED of the Detection Unit will not become on, wrong wiring or the damage of the unit may bepossible, which will be caused by the excessive voltage or current to the Detection Unit. Upon you
may observe such error appearance, stop to use the unit, and check with the wiring and the load
status.
(2) On RS-3000FA and RS-3500FA abnormally Red LED may light on though the absorbent paper islocated correctly, or Green LED may light on though the absorbent paper is not located;
Or, on RS-3000FAP, RS-3000FAP-S, RS-3500FAP and RS-3500FAP-S, Green LED may be kept on,
though the test water penetrates into the detecting area;
For these cases, the Detection Unit may be possibly damaged. Stop using the unit immediately, andconsult the vendor or the factory.
(3) When the incorrect output status is observed though the LED functions correctly, the unit may bedamaged by wrong wiring or excessively loaded output at the output transistor inside. Check thewiring and the load.
(4) When the Detecting Unit is not placed far into the Bracket as its position, the LED will light on Red andoutput turns OFF status. Check the location of the Detecting unit in its Bracket again, and adjust it ifplacement is wrong.
NOTE: RS-3000FAP-S and RS-3500FAP-S will not alarm by the incorrect position at the Bracket.
Please be aware not to pass over the position of the Detection Unit and Bracket.
(5) When RS-3000C or RS-3500C Control Unit is applied, be aware that the output of the unit is provided
in one pole only in spite the Detection Unit may be connected more than two. When one among
those connected Detecting Units may turns the output OFF, the singular relay output of the Control Unit
becomes ON=Open.
All the Dip Switch must be set at correct position as instructed before in this manual.

NOTE: The RS-3000 series sensors utilize the optical devices, and the highly intensive light fromoutwards (over 1,000 luxes) may disable the function of the Detecting Unit. The normal
intensity like the room light may not affects critically, however for safety, you arerecommended to avoid any devices which emit the intensive light from the Detection Unit
neighborhood, or to shade the light by means of anything applicable.

105. Resetting after the Leak Detection
WARNING： The liquid may contain hazardous acids, alkalis, or chemical substances. The
following procedure has to be dome by a well-trained person who isknowledgeable for that liquid.
NOTE： The protection gloves must be worn.
NOTE： In case of handling any chemicals that are obliged to wear the protection goggles, masks,
etc. by the regulation, you must follow such regulations.
(1) Turn off the power.
(2) Remove the Detection Unit from the Bracket, and wipe the liquid off.
(3) Remove the wet Absorbent Paper and wipe the Bracket and surroundings. Replace with a newpaper then reset to follow the process of Installation of the Detection Unit.
(4) If the absorbent paper is not applied, wipe the unit, the Bracket and the surroundings. Then reset tofollow the process of installation section in this manual.
(5) Turn on the power again then the reset is completed..
(6) Check the function of the sensors with the steps of the Section 4.1 to 4.2. Operation(7) Achieve periodical maintenance check of the sensor.
As the material of the absorbent paper is cellulose, then the material properties would becomechanged by the time during the service period, then a periodical replacement of the paper isrecommended if the sensor is located for a respectively long time.

NOTE： The periodical check is recommended as following your factory protocol or regulations ofmaintenance plan, but more than at least annually.
WARNING： The Sensor is not designed explosion proof. Do not use in the hazardous area.
For this category of UL standard does not allow to use in hazardous area, and UL
does not evaluate for use in explosive circumstances.

11

6. Specification
6-1. Control Unit
Model

RS-3000C

RS-3500C

Input Voltage

24V DC +/- 10%

Power Consumption

200mA below

Input

Simultaneously 1 to 8 ea of independent Input available
Independent LED Display for corresponding Input Socket Number
Red LED for Alarm x 8 points, Green LED for normal status x 8 points
If both LED are blank, its corresponding Input Socket is empty.
SPST Relay Output × 1, Normal Status: Close,
Leakage or Alarm: Open, Power Failure: Open

LED Display
OutputAmbient Temp.

－10 to 60 deg C (environment)

Case Material

ABS Polymer

Cable connection
Installation

8 ea of Socket for the Plug with Detecting Unit (Lock fix feature)
Power supply & Output:: 1ea of Socket for both wirings (Lock fix feature)
On the DIN Rail, or Screw fix up (by 2ea of M4 thread)
RS-3000 will outputs the alarm status by followings; Cut circuit conditions (no power or no
signal) Wrong-wiring conditions
Warning: The shortage between Red cord and black cord may destroy thetransistor device for output signal instantly.

Wiring Error

Applicable Detection Unit

RS-3000FA, RS-3000FAP,
RS-3000FAP-S;
RS-3000*-BZ Buzzer Alarm Leak Sensor
is available, too.

RS-3500FA, RS-3500FAP,
RS-3500FAP-S;
RS-3500*-BZ Buzzer Alarm Leak Sensor
is available, too.

*The recommended Plug for connection of the above Control Unit and the Detection Unit is OMRON XN2A-1430 type.

6-2. Detection Unit
(1) RS-3000 series
Model

RS-3000FA

Supply Voltage

RS-3000FAP-S

DC 12V～24V ±10%

Current

20mA below

Indication of LED
OutputLeakage ➔ Red,
Wrong Position Error ➔ Red
Normal Status ➔ Green
Single PNP open collector, 50mA max (normal; ON)
When Indication of LED is Red, relay contact opens
During Indicator of LED is Green, relay contact stays closed－10 to 60 deg C

Ambient Temp.

Material

RS-3000FAP

Case

PFA

Cable

FEP, 3-wire sheath

Lamp

Epoxy (embedded)

Water Protect

Sealed, IP 67 equivalent (IEC)

WeightApprox 40g

Absorbent Paper

Required

Not Required

BracketP/N-6440

P/N-6430

Remarks

Position Monitor

Position Monitor

No Position Monitor

(2) RS-3500 Series
RS-3500FA

Model

RS-3500FAPDC 12V～24V ±10%Supply Voltage

20mA below

Current

Leakage ➔ Red
Improper location Error ➔ Red
Normal ➔ Green
Single PNP open collector, 50mA max (normal; ON)
When Indication of LED is Red, relay contact opens
During Indicator of LED is Green, relay contact stays closed

Indication of LED
Output－10 to 60 deg C

Ambient Temp.

Material

RS-3500FAP-S

Case

PFA

Cable

FEP, 3-wire sheath

Lamp

Epoxy (embedded)
Sealed, IP 67 equivalent (IEC)

Water Protect

Approx 40g

WeightAbsorbent Paper

Required

Not Required

BracketP/N-6440

P/N-6430

Remarks

Position Monitor

Position Monitor

No Position Monitor*Out Diameter of the cable is as below, but the slight difference may remain as the tolerance because of the manufacturing process:
Diameter = 2.29mm +/- 0.25mm

6-3. Bracket
Models

P/N-6440

P/N-6430

P/N-6716

RS-3000FA / RS-3500FA

RS-3000FAP /RS-3000FAP-S /RS-3500FAP /RS-3500FAP-S

RS-3000FAP /RS-3000FAP-S /RS-3500FAP /RS-3500FAP-S

Materials

PVC

PVC

SUS301+ Ni plated

Installation

3-M4 screw holes

3-M4 screw holes

3-M3 screw holes

Sensors*M3, M4 is the nominal code for screw specification designated by Japanese Industrial Standard, JIS B 1101.

13

7. Outlook and Dimensions:Control Unit:

Detection Unit:

RS-3000C / RS-3500C

RS-3000FA / RS-3000FAP / RS-3000FAP-S
RS-3500FA / RS-3500FAP / RS-3500FAP-S

All about the dimensions of RS-3000 / RS-3500 series Detection
Units are same shape and sizes.

Bracket:14