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.
7
8
4
E2
E3
E1
11
10
3 9
5
6
11
10
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
84
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.
1
2
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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