Conductive Level Controller Battery (24 VDC) allows use in locations without AC power supply. AC sine-wave voltage between electrodes enables stable detection with no electric corrosion. • Outputs can be set to self-hold at ON or OFF using special circuits. • Adjustable sensitivity, with an operating resistance range of 0 to 100 kΩ, allows use for a wide variety of liquids. • Relay contact chattering conventionally caused by waves eliminated using open collector output, reducing contact wear. • Meets CE marking and is a UL recognized component. Refer to Safety Precautions for Floatless Level Controllers. Features The 61F can now run on DC power to allow energy savings, greater safety, and use in emergency situations. Combines DC Power Supply with AC Sensing Method AC sine-wave signals are sent to electrodes using a built-in DC-AC converter, preventing electric corrosion and ensuring safety. Supports Multi-channel Sensing Power supply circuits and detection circuits are isolated, allowing more than one Controller to be used in the same tank. Open Collector Output Signals can be used as direct input for a PLC. PNP output is also possible using the connection method. Oscillator circuit Detector circuit Upper limit Mid-point Control output is possible for upper limit, mid-point, and lower limit. Lower limit Same Wiring for Supply and Drainage Supply control and drainage control can be performed with the same wiring (short terminals 7 and 8 for supply control). This makes it easy to perform wiring and confirm connection. Chattering Load Drainage control Supply control Short-circuit Ordering Information Product name Conductive Level Controller Relay contact (SPST-NO) Front Socket Electrode Holder Note: A variety of Holders are available to suit different types of application. For details, refer to 61F Floatless Level Controller (F030-E1-8).

Specifications ■ Ratings 61F-GPN-BT Rated voltage Allowable voltage range Interelectrode voltage Operation resistance (See note 1.) Release resistance Switching between supply and drainage Terminals 7 and 8 open: Automatic drainage operation Terminals 7 and 8 shorted: Automatic supply operation Output specifications Open collector (NPN) 30 VDC, 100 mA max. Leak current: 100 μA max. Relay output, SPST-NO 5 A, 240 VAC (Resistive load) 5 A, 30 VDC Life expectancy Electrical: 100,000 operations min. Mechanical: 20,000,000 operations min. Wiring distance (See note 2.) Note: 1. The 61F may not operate...

61F-GPN-BT/-BC ■ Reading Signals for the Liquid Level Only (No Control) Only E1 and E3 are used. Output will turn ON when the liquid level reaches E1 if terminals 7 and 8 are open, and will turn OFF if terminals 7 and 8 are closed. Also, to take signals for liquid level at several points, use terminal 4 as a common for all of the Controllers and use terminal 5 of each Controller as an electrode. Note: If terminals 7 and 8 are shorted, operation of the 61F relay is “de-energizing” (i.e., energized normally and de-energized when liquid is present across the electrodes). Therefore, if the power...

Safety Precautions Refer to Safety Precautions for Floatless Level Controllers. General Precautions Before using the Controller under conditions not described in the relevant documents or applying the Controller to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment and other systems, machines, and equipment that may have a serious influence on lives and property if used improperly, consult your OMRON representative. Make sure that the ratings and performance characteristics of the Controller are sufficient...

Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR...