Omron 61F-GL2KM - User Manual

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CSM_61F-G__DS_E_3_1

Floatless Level Switch (Basic Type)

61F-G@

Basic Building-block Controllers That Mount

Directly to Panels for Easier Maintenance

• Easy maintenance with building-block Relay Units.

• Easy identification of operating status with LED operation

indicator.

• Lineup includes models for tropical regions and for high

temperatures. Achieve stable detection even in high-

temperature environments.

Refer to Safety Precautions for Floatless Level

Controllers.

Model Number Structure

Ordering Information

Note: When ordering, specify the desired operating voltage at the end of the model number.

61F-@@

1. Control Application

G: Automatic water supply and drainage

G1: Automatic water supply with idling prevention or water

shortage alarm

G2: Automatic water supply and drainage with abnormal

water increase alarm

G3: Automatic water supply and drainage with full tank and

water shortage alarm

G4: Automatic water supply with water level indicator for

water supply tank and water receiving tank and

prevention of idling due to water shortage

I: Liquid level indication and alarm (no two-wire models)

2. Type

Blank: General-purpose

L 2KM: Long-distance (for 2 km)

L 4KM: Long-distance (for 4 km)

H: High-sensitivity

D: Low-sensitivity

R: Two-wire

T: High-temperature

Type General-purpose Long-distance, 2 km Long-distance, 4 km High-sensitivity

Model Model Model Model

Application G 61F-G 61F-GL 2KM 61F-GL 4KM 61F-GH

Application G1 61F-G1 61F-G1L 2KM 61F-G1L 4KM 61F-G1H

Application G2 61F-G2 61F-G2L 2KM 61F-G2L 4KM 61F-G2H

Application G3 61F-G3 61F-G3L 2KM 61F-G3L 4KM 61F-G3H

Application G4 61F-G4 61F-G4L 2KM 61F-G4L 4KM 61F-G4H

Application I 61F-I 61F-IL 2KM 61F-IL 4KM 61F-IH

Relay Unit 61F-11 61F-11L 2KM 61F-11L 4KM 61F-11H

Type Low-sensitivity 2-wire Tropical environments High-temperature

Model Model Model Model

Application

G 61F-GD 61F-GR 61F-G-TDL 61F-GT

Application

G1 61F-G1D 61F-G1R 61F-G1-TDL 61F-G1T

Application

G2 61F-G2D 61F-G2R 61F-G2-TDL 61F-G2T

Application

G3 61F-G3D 61F-G3R 61F-G3-TDL 61F-G3T

Application

G4 61F-G4D 61F-G4R 61F-G4-TDL 61F-G4T

Application

I 61F-ID --- 61F-I-TDL 61F-IT

Relay Unit

61F-11D 61F-11R --- 61F-11T

Position of

LED indicator

Example: 61F-G [110/220 VAC]

Desired supply voltage

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The Omron 61F-G Floatless Level Switch is a basic type controller designed for reliable liquid level detection in various applications. This device offers a straightforward and efficient solution for automatic water supply and drainage control, with several models tailored to specific operational needs and environmental conditions.

Function Description

The core function of the 61F-G series is to detect and control liquid levels using electrodes, eliminating the need for traditional float mechanisms. This floatless design provides enhanced reliability and reduces maintenance compared to mechanical switches. The series includes models for a wide range of control applications:

Automatic Water Supply and Drainage (61F-G): This is the fundamental function, enabling the pump to start or stop based on predefined liquid levels. For water supply, the pump activates when the level drops below a certain point and stops when it reaches the desired upper level. For drainage, the pump starts when the liquid reaches an upper threshold and stops when it drops to a lower level.
Automatic Water Supply with Idling Prevention or Water Shortage Alarm (61F-G1): This model adds intelligence to water supply systems. It prevents pump idling by stopping the pump and triggering an alarm if the water source level drops too low, protecting the pump from damage. It also ensures the pump starts only when sufficient water is available in the source.
Automatic Water Supply and Drainage with Abnormal Water Increase Alarm (61F-G2): This variant is designed for scenarios where an abnormal increase in water level needs to be detected. In water supply applications, it can trigger an alarm if the tank becomes overfull. In drainage applications, it can alert to an unexpected rise in the liquid level, indicating a potential overflow.
Automatic Water Supply and Drainage with Full Tank and Water Shortage Alarm (61F-G3): This comprehensive model provides both upper and lower limit alarms for water tanks. It can signal a full tank condition and a water shortage condition, offering robust monitoring for critical liquid levels in both supply and drainage systems.
Automatic Water Supply with Water Level Indicator for Water Supply Tank and Water Receiving Tank and Prevention of Idling Due to Water Shortage (61F-G4): This advanced model offers detailed water level indication for both the supply source and the elevated tank. It incorporates pump idling prevention due to water shortage in the source and provides indicators for various liquid levels within the elevated tank, offering a complete overview of the water management system.
Liquid Level Indication and Alarm (61F-I): This model focuses purely on liquid level indication and alarm functions without direct pump control. It provides visual alerts for upper, intermediate, and lower liquid levels, making it suitable for monitoring applications where manual intervention or integration with other control systems is desired.

Usage Features

The 61F-G series is designed for versatility and ease of integration into various industrial and commercial settings.

Diverse Control Applications: With multiple models, the series can address a wide array of liquid level control needs, from simple pump automation to complex monitoring with multiple alarm conditions.
Adaptability to Environmental Conditions: Specific models are available for challenging environments.
- Long-distance Controllers (61F-GL 2KM/4KM): These are ideal for applications where the distance between the controller and the electrodes (e.g., between sewage pumps and water tanks) is significant, up to 2 km or 4 km, respectively.
- High-sensitivity Controllers (61F-GH): Designed for liquids with high specific resistance, such as distilled water, ensuring accurate detection even with less conductive fluids.
- Low-sensitivity Controllers (61F-GD): Suitable for liquids with low specific resistance, like salt water, sewage, or various acid/alkali chemicals, where a higher tolerance for conductivity variations is needed.
- Two-wire Controllers (61F-GR): These simplify wiring by using only two wires between the controller and the electrode holder, making installation more straightforward.
- Tropical Environment Models (61F-G-TDL): Engineered for regions with high humidity (storage humidity of 45% to 90%), ensuring reliable operation in challenging climatic conditions.
- High-temperature Controllers (61F-GT): Built to withstand high ambient temperatures, extending the operational range of the device.
LED Operation Indicator: Each model is equipped with an LED indicator that clearly displays the operating status, allowing for quick visual confirmation of the liquid level and pump status.
Flexible Power Supply Connections: The controllers support both 110 VAC and 220 VAC power supply connections, accommodating different electrical standards.
Pushbutton Switch Integration: Some models incorporate pushbutton switches for manual control or resetting alarms, providing an additional layer of operational flexibility.
Grounding Requirement: All models emphasize the importance of grounding the common electrode (the longest electrode) to ensure stable and safe operation.

Maintenance Features

The 61F-G Floatless Level Switch is designed with ease of maintenance in mind, contributing to reduced downtime and operational costs.

Building-block Relay Units: The modular design utilizes building-block Relay Units (61F-11 series) that can be easily replaced. This modularity simplifies troubleshooting and maintenance, as individual components can be swapped out without replacing the entire controller.
Direct Panel Mounting: The controllers are designed to mount directly to panels, making installation and subsequent access for maintenance straightforward.
Clear Internal Circuit Diagrams: The manual provides detailed internal circuit diagrams for various models, which are invaluable for understanding the device's operation, troubleshooting, and performing repairs.
Interchangeable Relay Units: Many Relay Units are interchangeable with the general-purpose 61F-11 model, offering flexibility in inventory management and replacement.
Color-coded Bands: Relay Units are identified by color bands on their nameplates (Red, Yellow, Blue, Black, Green), which helps in quick identification and ensures the correct unit is used for replacement.
Simplified Troubleshooting: The LED operation indicator provides immediate feedback on the device's status, aiding in rapid identification of operational issues. For instance, in water supply applications, an ON indicator might mean the pump has stopped due to the water level reaching the upper limit, while an OFF indicator could mean the pump is running or has stopped due to a low water level.
Robust Design: The floatless design inherently reduces the need for maintenance associated with mechanical floats, such as wear and tear or fouling.
Clear Wiring Instructions: The manual provides comprehensive wiring diagrams and instructions for various control applications, ensuring correct installation and minimizing wiring errors that could lead to maintenance issues.

Omron 61F-GL2KM Specifications

General

Contact Configuration	SPDT
Insulation Resistance	100 MΩ min at 500V DC
Ambient Humidity	35% to 85%
Protection Rating	IP40
Electrical Life	100, 000 operations min
Temperature Range	-10 to 50 °C
Ambient Temperature	-10 to 55°C
Operating Temperature Range	-10 to 50 °C