User Manual

12
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
• A lineup of new models compatible with Push-In Plus Terminal
Sockets is available.
• Series of plus common connection compatible products added.
• UL listed when used with Push-In Plus Terminal Sockets. * 1
• Stable detection of liquids with impedance as high as 1 M
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, allowing several Amplifiers to be installed in the same place.
• After a disconnection is detected, operating status is held to eliminate instability due to contact of the disconnected part. * 2
• CE Marking and UL/CSA certification. *3
Features
A total distance of 400 m is achieved for cable and Sensing Band to minimize leakage damage.
*1. The UL listing applies only when the Sensor is used in
combination with a Push-In Socket (P2RF-08-PU).
By itself, the K7L is UL recognized.
*2. For the K7L-UD.
*3. UL: UL 508
CAN/CSA C22.2 No.14
CE: EMI EN 55011
EMS EN 61000-6-2
Refer to Safety Precautions on page 19.
234
234
Cable
Terminal Block
Terminal Block Terminator
Connecting cable
Total length of cable and Sensing Band is 400 m max.
Cable
Industry's
longest
Sensing Band
Breaks
in wiring
Broken
wire signal
Only 192 mm for 12 Units
* According to an OMRON survey
2-4
(4-2)
234
234
Sensing Band
Greatly expands the detection area. Detects broken wires.
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.
Detects broken wires all the way from the
main unit to the tip of the Sensing Band.
This enhances reliability in long-distance
wiring applications.
Helps to downsize gang-mounted panels. Features a Noise Canceller (Patented)
The extremely compact size,
with a width of only 16 mm,
helps to save panel size when
mounting several Units together.
A noise canceling circuit employing
a three-conductor cable enables
stable liquid leakage detection with
excellent noise resistance.
Application Examples
Floor below Chemical Purification Tank
Floor below Chemical Purification Tank
Floor below Chemical Purification Tank
Floor or Ceiling of Semiconductor or
Floor or Ceiling of Semiconductor or
Flat Panel Display Factory
Flat Panel Display Factory
Floor or Ceiling of Semiconductor or
Flat Panel Display Factory
K7L-U(D)
K7L-U(D)