Omron 61F-GPN-BC User manual

Conductive Level Controller 61F-GPN-BT/-BC E-15

Level

Controllers

Conductive Level Controller

61F-GPN-BT/-BC

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 cir-

cuits.

• 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 elimi-

nated using open collector output, reducing contact wear.

• Bears CE marking and is a UL recognized component.

Features

The 61F can now run on DC power to allow energy savings, greater safety, and use in

emergency situations.

Ordering Information

Note: A variety of Holders are available to suit different types of application. For details, refer to 61F Floatless Level Controller

(F030-E1-8).

Product name Model number

Conductive Level Controller 61F-GPN-BT 61F-GPN-BC

Open collector (NPN) Relay contact (SPST-NO)

Front Socket PF113A-E

Electrode Holder (See note.)

Upper limit

Mid-point

Lower limit

Valve

Short-circuit

Pump

Chattering

Load

Open Collector OutputCombines 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.

Oscillator

circuit

Detector

circuit

Supports Multi-channel

Sensing

Power supply circuits and

detection circuits are

isolated, allowing more

than one Controller to be

used in the same tank. Control output

is possible for

upper limit,

mid-point, and

lower limit.

Signals can be used as

direct input for a PLC.

PNP output is also

possible using the

connection method.

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.

Drainage

control

Supply

control

E-16 Conductive Level Controller 61F-GPN-BT/-BC

Specifications

■Ratings

Note: 1. The 61F may not operate at resistance settings close to zero. Adjust the sensitivity to match actual usage conditions.

2. The figure for wiring distance above is for when 600-V 3-core cabtyre cable with a cross-sectional area of 0.75 mm2is used.

■Characteristics

Note: The dielectric strength is measured between power terminals

and electrode terminals, power terminals and output terminals,

and between electrode terminals and output terminals.

Connections

■Automatic Drainage Operation

Note: The part within the dotted-line box is for the 61F-GPN-BC (relay-output type) only.

■Automatic Water Supply Operation

Short terminals 7 and 8 for automatic water supply operation. (Operation shown in parentheses in the diagram above.)

61F-GPN-BT 61F-GPN-BC

Rated voltage 24 VDC

Allowable voltage range 85% to 110% of the rated voltage

Interelectrode voltage 5 VAC max.

Operation resistance (See note 1.) Variable (0 to 100 kΩ)

Error For scale of 0: +10 kΩ; For scale of 100: ±10 kΩ

Release resistance 200% max. of the operation 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.

SPST-NO

5 A, 240 VAC (Resistive load)

2 A, 240 VAC (Inductive load: cosφ=0.4)

Life expectancy --- Electrical: 100,000 operations min.

Mechanical: 20,000,000 operations min.

Wiring distance (See note 2.) 100 m max.

Ambient operating temperature −10 to 55°C

Ambient operating humidity 25% to 85%

Insulation resistance 100 MΩmin. (at 500 VDC)

Dielectric strength (See note.) 2,000 VAC, 50/60 Hz for

1minute

Power consumption 2 W max.

Response time Operating: 1.5 s max.

Releasing: 3.0 s max.

3 9

24 VDC

Recommended power supply; eg. OMRON S8VS

OUT+

OUT−

OUT+

OUT−Pump ON (OFF)

Pump OFF (ON)

61F-GPN-BT

(See note.)

Open collector

output

Relay contact

output

Supply/

drainage

selection

terminals

Conductive Level Controller 61F-GPN-BT/-BC E-17

Level

Controllers

■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 supply connected across terminals 3 and 9 is interrupted, the output from terminals

10 and 11 will turn OFF, enabling detection of power interruptions.

Dimensions

Application Examples

49.4

38 70

101

61F-GPN-BT

61F-GPN-B_

PF113A-E

ON OFF

Battery

Applications

Liquid level control for solar

power generation systems.

Drainage control for semiconductor

wafer cleaning installations.

Liquid level control for remote

regions without AC power supply.

Meet safety standards by

using DC power supply for

all devices in a panel.

Liquid level control for waste-heat

recovery boilers in co-generation

systems.

Cut costs by using the 61F in situations

where ultrasonic/electrostatic capacity

level controllers were used because

only DC power supply was available.

Number of

controllers

required:

E-18 Conductive Level Controller 61F-GPN-BT/-BC

Precautions

General Precautions

Before using the Controller under conditions not described in the rel-

evant documents or applying the Controller to nuclear control sys-

tems, railroad systems, aviation systems, vehicles, combustion

systems, medical equipment, amusement machines, safety equip-

ment 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 for the systems, machines, and equipment

and be sure to provide the systems, machines, and equipment with

double safety-mechanisms.

Safety Precautions

In order to ensure safe operation, be sure to observe the following

points.

•Use a power supply voltage within the specified range.

•Do not use the Controller in locations subject to flammable gases

or objects.

•Insert the Socket until it securely clicks into place.

•Do not short the load connected to the output terminals.

•Do not connect the power supply in reverse.

Correct Use

Mounting

Mount to a panel of thickness 1 to 5 mm.

Do not mount the Controller in the following places.

•Locations subject to strong vibrations or shocks.

•Locations outside the specified temperature and humidity ranges,

or locations prone to condensation. (The Controller detects high

impedances. Do not use in locations subject to high humidity lev-

els.)

•Locations subject to dust.

•Locations subject to corrosive gases (in particular, sulphurized gas

or ammonia gas).

•Outdoors, or in locations subject to direct sunlight.

•Near devices that generate strong, high-frequency noise (e.g.,

high-frequency welders, machines).

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.

To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. F053-E1-02

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