Datasheet
4 Liquid Leakage Sensor Amplifier K7L-AT50
Specifications
■ Ratings
Note: UL File No. E138234
CSA File No. LR95291-21
CE EMS: EN 61000-6-2
EMI: EN 55011
■ Characteristics
Rated power supply voltage 12 to 24 VDC (Allowable voltage fluctuation range: 10 to 30 VDC)
Operate resistance 0
Ω to 50 MΩ, variable
Range 0: 0 to 250 k
Ω
Range 1: 0 to 600 kΩ
Range 2: 0 to 5 MΩ
Range 3: 0 to 50 MΩ
Note: The range is set using the DIP switch on the side of the Sensor Amplifier. (Refer to DIP Switch Set-
tings.) Set the corresponding pin of the DIP switch in the up position. (For range 0, set all 3 pins in
the down position.) The adjuster (ADJUST) on the top of the Sensor Amplifier sets the resistance
value for detection within the set range. It is factory-set to the upper limit. (Normally, the K7L can
be used with the adjuster at this setting.) With any range, resistance values can be set from 0
Ω.
Release resistance 105% min. of operate resistance
Output configuration NPN open-collector transistor output with 100 mA at 30 VDC max.
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.
Wiring distance Connecting cable: 50 m max.
Sensing Band length: 10 m max.
Note: These values are possible on 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 a Liquid Sensing
Band specified by OMRON. (A 0.2-mm
2
cable can also be used.)
Accessories F03-20 Terminal Block (for connecting the connecting cable and Sensing Band)
Screwdriver for ADJUST setting.
(Purchase the Sensing Band, Sensing Band Stickers, connecting cable, and Socket separately.)
Ambient temperature Operating: –10 to 55°C
Ambient humidity Operating: 45% to 85%
Insulation resistance 10 M
Ω at 100 VDC between case and current-carrying parts
Dielectric strength 1,000 VAC at 50/60 Hz for 1 min between case and current-carrying parts
Power consumption 1 W max.
Response time Operate: 800 ms max.
Release: 800 ms max.
Weight Approx. 14 g