The Omron K7L-AT50, also cataloged as the K7L-AT50 Liquid Leakage Sensor Amplifier, provides direct signal processing for liquid leakage detection circuits using dedicated sensing bands and resistance-based detection methods.

Model Identification

The K7L-AT50 is a liquid leakage detection amplifier designed to interface with OMRON liquid sensing bands. It converts leakage resistance changes into transistor output signals for connection with PLC inputs, relay circuits, or monitoring systems. The unit supports adjustable detection resistance ranges through side DIP switch settings.

Hardware Specifications

Industrial Control Integration Features

The K7L-AT50 operates as a discrete sensing interface within Omron control systems. Its open-collector output configuration allows connection to standard PLC digital input channels without additional signal conversion.

The amplifier performs resistance measurement on connected sensing bands and switches output status when the detected liquid resistance reaches the configured threshold. The adjustable detection range supports different sensing conditions by DIP switch selection and top-panel adjustment.

Ordering Configuration

• 1 x Omron K7L-AT50 Liquid Leakage Sensor Amplifier
• 1 x Terminal Block
• 1 x Adjustment Screwdriver
• 1 x Terminator
• Compatible sensing accessories must be ordered separately when required

Field Installation Guidelines

• Install the amplifier in a location within the specified operating temperature and humidity range.
• Use insulated three-conductor cable for long-distance sensing connections.
• Keep sensing cable routing separated from high-voltage power lines to reduce electrical interference.
• Connect the sensing band according to OMRON wiring specifications.
• Verify DIP switch range selection before applying power.
• Confirm transistor output polarity settings before connecting external control equipment.
• Reset the power supply after disconnection detection events to restore normal operation.

Industrial Signal Processing Characteristics

The K7L-AT50 follows the Omron industrial control component design approach used for compact PLC-connected devices. The unit supports stable discrete signal acquisition by converting resistance variation into electrical switching output.

The device is configured for I/O density scaling within automation panels where multiple sensor signals are monitored through PLC digital input architectures. Its compact design allows integration into DIN-rail or control cabinet assemblies using compatible terminal accessories.

Frequently Asked Questions

• What type of sensor input does the K7L-AT50 support?

The unit accepts liquid leakage sensing bands and detects leakage through resistance changes in the connected sensing circuit.

• What is the power supply requirement for the K7L-AT50?

The amplifier requires 12 to 24 VDC operation with an allowable voltage range from 10 to 30 VDC.

• Does the K7L-AT50 provide analog output signals?

No. The unit provides open-collector transistor switching output for leakage detection and disconnection detection.

• What is the maximum sensing cable distance?

The maximum connecting cable length is 50 m when using specified insulated sensing cable conditions.

• Can the detection resistance range be adjusted?

Yes. Detection ranges are selected using side DIP switches, and fine adjustment is available through the top adjuster.

• Does the K7L-AT50 support disconnection detection?

The standard K7L-AT50 model supports liquid leakage detection. Disconnection detection depends on the specific model version.

• What is the output electrical rating?

The transistor output supports a maximum load of 30 VDC and 100 mA.

• How is the unit restored after disconnection detection?

Recovery is performed by resetting the power supply according to the specified operating procedure.