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 M
Ω
, variable
Range 0: 0 to 250 k
Ω
Range 1: 0 to 600 k
Ω
Range 2: 0 to 5 M
Ω
Range 3: 0 to 50 M
Ω
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