New Product News
Liquid Leakage Sensor Amplifiers
for Long-distance Wiring
K7L-U/K7L-UD
A new long-distance wiring model joins the K7L Series.
The industry's smallest size and longest wiring ability — ideal
for detecting liquid leakage on factory floors and ceilings.
Enables long-
distance wiring
up to 400 m.
A total distance of 400 m is achieved for cable
and Sensing Band to minimize leakage damage.
Greatly expands the detection area.
A total distance of 400 m
for the cable and Sensing
Band extends the wiring
distance by approximately
7 times compared with our
previous models.
Cable
Terminal Block
3 4
2
Detects broken wires.
Broken
wire signal
Detects broken wires all
the way from the main
unit to the tip of the Sens-
ing Band. This enhances
reliability in long-distance
wiring applications.
Breaks
in wiring
3 4
Industry's
longest
2
Total length of cable and Sensing Band is
400 m max.
*According to an OMRON survey
Helps to downsize gang-mounted panels.
The extremely compact size, with a width of
only 16 mm, helps to save panel size when
mounting several Units together.
Application Examples
Floor or Ceiling of Semiconductor or
Flat Panel Display Factory
Floor below Chemical Purification Tank
4
3
2
4
3
2-4
(4-2)
Sensing Band
Terminal Block
Cable
Features a Noise Canceller (Patented)
A noise canceling circuit employing a
three-conductor cable enables stable
liquid leakage detection with excellent
noise resistance.
Connecting cable
Only 192 mm for 12 Units
2
Sensing Band
Terminator
K7L-U(D)
K7L-U(D)
Liquid Leakage Sensor Amplifiers for Long-distance Wiring
K7L-U/-UD
Ultra-miniature Liquid Leakage Sensor
Amplifier Enables Longest Liquid Leakage
Monitoring Distance in Industry
• Stable detection of liquids with impedance as high as 1 MΩ using
inter-electrode resistance detection. Detection of chemical liquids
and pure water is possible.
• Higher noise immunity with a noise canceller circuit connected to
a 3-conductor cable.
• Prevents electrode corrosion with an AC detection method.
• The power supply circuit and detection circuit are isolated, allow-
ing several Amplifiers to be installed in the same place.
• After a disconnection is detected, operating status is held to elim-
inate instability due to contact of the disconnected part.
(See note.)
Note:
For the K7L-UD.
UL
UL 508
CAN/CSA C22.2 No. 14
CE
EMC Directives
EMI: EN 55011
EMS: EN 61000-6-2
Ordering Information
Product name
Amplifier
Liquid Leakage Sensor Amplifier
Liquid Leakage Sensor Amplifier
with Disconnection Detection
Function
Sensors
Sensing Band
K7L-U
K7L-UD
Model
---
---
Characteristics
F03-15
F03-16PE
F03-16PT
F03-16SF
F03-16SFC
Standard model
Greater durability and condensation resistance. (See note 1.)
Greater temperature and chemical resistance. (See note 1.)
Greater flexibility and superior workability. (See note 1.)
Greater flexibility and enables visual confirmation when the in-
ner color appears.
Easier to wipe off than the band type.
Electrodes have fluororplastic coating to resist chemicals.
Used for F03-15 or F03-16SF(C).
Used for F03-16PE (adhesive tape).
Used for F03-16PE (screws).
Used for F03-16PT (screws).
Used for F03-16PS.
---
---
---
Point Sensor
Mounting Brack-
ets and Stickers
Sensing Band Stickers
F03-16PS
F03-16PS-F
F03-25
F03-26PES
F03-26PEN
F03-26PTN
Point Sensor Mounting Brackets
Track-mounted
Socket
Terminal Blocks
Note: 1.
2.
3.
4.
Round terminals can be used.
Round terminals cannot be used.
F03-26PS
P2RF-08
P2RF-08-E
F03-20
Compared with the standard model, F03-16PE.
One F03-20 Terminal Block is included as an accessory with the K7L-U/-UD.
The minimum order for the F03-25, F03-26PES, or F03-26PEN Sensing Band Stickers is one set (contains 30 Stickers).
The minimum order for F03-20 Terminal Blocks, F03-26PTN Sensing Band Stickers, or F03-26PS Point Sensor Mounting Brackets is one
set (contains 10 Terminal Blocks, Stickers, or Mounting Brackets).
Liquid Leakage Sensor Amplifiers for Long-distance Wiring
K7L-U/-UD
3
■
Available Sensing Band Lengths
1m
F03-16PE
F03-15
F03-16PT
F03-16SF(C)
OK
OK
OK
2m
OK
OK
OK
5m
OK
OK
OK
OK
10 m
OK
OK
OK
OK
15 m
OK
OK
OK
OK
20 m
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
25 m
OK
OK
30 m
40 m
50 m
OK
OK
OK
OK
60 m
70 m
75 m
80 m
90 m
100 m
Note: 1.
To place an order for 1 m of the F03-16PE for example, specify F03-16PE-1M.
2.
If you cannot find the length you need, please order the nearest larger length, then cut it to the required size.
Specifications
■
Ratings
Rated power supply voltage
Operate resistance
12 to 24 VDC (Allowable voltage fluctuation range: 10 to 30 VDC)
0 to 1 M
Ω
variable
Note:
The adjuster (ADJUST) on the top of the Sensor Amplifier sets the resistance for detection within
the setting range. It is factory-set to the upper limit. (Normally, the K7L can be used with the adjust-
er at this setting.)
Disconnection detection function
(See note.)
Release resistance
Output configuration
Detection signal: 10 VDC max., 200 ms
Detection time: 10 s max.
Recovery: Operation is recovered by resetting the power supply.
105% min. of operate resistance
NPN open-collector transistor output with 100 mA at 30 VDC max. for both liquid leakage detection and
disconnection detection.
Note:
If the rightmost pin of the DIP switch on the side of the Sensor Amplifier is set to the down position,
the output turns ON when liquid is detected; if it is set to the up position, the output turns OFF when
liquid is detected.
Vibration resistance
Shock resistance
Wiring distance
10 to 150 Hz, 0.1-mm single amplitude with 50-m/s
2
acceleration for 8 minutes 10 times each in X, Y, and
Z directions
150 m/s
2
3 times each in six directions on 3 axes
Wiring cable
Sensing Band
Total: 400 m max.
Note:
These values are possible on the condition that a completely insulated 3-conductor VCT cable with
a thickness of 0.75 mm
2
and a dielectric strength of 600 V is used together with the Liquid Sensing
Band specified by OMRON. (A 0.2-mm
2
cable can also be used.)
Accessories
Terminal Block
K7L-U
K7L-UD
Note:
For the K7L-UD.
1
1
1
1
Screwdriver for ADJUST
---
1
Terminator
■
Characteristics
Ambient temperature
Ambient humidity
Insulation resistance
Dielectric strength
Power consumption
Response time
Operating: –10 to 55
°
C
Operating: 45% to 85%
10 M
Ω
at 100 VDC between case and current-carrying parts
1,000 VAC at 50/60 Hz for 1 min between case and current-carrying parts
1 W max.
Operate: 800 ms max.
Release: 800 ms max.
Startup time after power ON: 2 s max.
Approx. 14 g
Weight
4
Liquid Leakage Sensor Amplifiers for Long-distance Wiring
K7L-U/-UD
Nomenclature and DIP Switch Settings
Power indicator (green)
(Lit when power is supplied.)
NOT USED
MODE(OUTPUT)
Output indicator (red)
(Lit when output is ON.)
Resistance
adjuster
OUT
ADJUST
NOT USED
MODE(OUTPUT)
NC
NO
OMRON Corporation
MADE IN JAPAN
Sensing Range Settings
DIP switch
Output
Output is OFF when liquid leak-
age or disconnection is detected.
(See note.)
Output is ON when liquid leakage
or disconnection is detected.
(See note.)
Note:
Disconnection detection is supported only by
the K7L-UD.
Noise Countermeasures (Common)
Noise Canceller Function for Highly
Sensitive Impedance Detection
The K7L-U Liquid Leakage Sensor Amplifier detects liquids with
impedance as high as 1 M
Ω
and connects to the Sensing Band
through a cable that can be extended up to 400 meters. Counter-
measures against external noise are especially important for the
Sensing Band and connecting cable because they pick up external
noise like an antenna. The K7L incorporates the noise canceller
function described below.
Connected with 3-conductor Cable that
Offsets Inductive Noise (Patent Pending)
A VCT cable with three conductors (lines) is used as shown in the
diagram. Line 1 is connected to the Sensing Band and line 2 is left
open. Lines 1 and 2 are almost in the same position and thus will
experience the same noise level. The K7L detects the difference
between these signals (including noise). This means that the noise
signals in lines 1 and 2 are offset against each other and a reading
for the signal, without inductive noise, can be made.
K7L
Signal transmission
line
Sensing Band
Line 1
Line 2
Connecting cable
Signal transmission circuit
Subtraction circuit
Resistance measurement circuit
Liquid Leakage Sensor Amplifiers for Long-distance Wiring
K7L-U/-UD
5
京公网安备 11010802033920号
EEWORLD
