OMRON 61F-GP-N8 User Manual
Conductive Level Controller
61F-GP-N8
Compact Plug-in Level Controllers for
Single or Two-point Level Cont rol o f
Conductive Materials (Liquids and
Solids)
Wide range of models: long-distance, high and
low-sensitivity, and two-wired types available.
24/100/110/120/200/220/230/240 VAC operation
possible.
Easy installation on DIN track.
Low-voltage (AC) electrodes.
Red LED operation indicator provided.
Conforms to EMC and LVD Directives.
UL/CSA approved.
Ordering Information
Model Number Legend:
61F-GP-N8j
123
1. Plug-in Type
2. Compact 8-pin Type
Accessories (Order Separately)
Selection Guide for Electrode Holders and Separators
Electrode Holders
Applications
Mounting style Flange Screw Flange Screw
Insulator material Phenol resin Phenol resin Ceramics Tef l on
Max. temperature 70°C 150°C (without water drips or vapor on
No. of
electrodes
For city water and
other general-use
electrodes. Easy-toreplace separate
versions facilitate
maintenance of electrodes.
1 --- --- BF-1 BS-1
3 PS-3S PS-31 --- ---
When mounting space
is limited. Special 3-pole
holder of small size and
light weight. Ideal for
soft drink vendors, etc.,
where only limited
space is available.
3. Applications
None: General-purpose type
L: Long-distance type
H: High-sensitivity type (reverse acting)
HY: High-sensitivity type (standard acting)
D: Low-sensitivity type
R: Two-wired type
For low specific liquids. Used for sewage, sea water, etc., having a low specific resistance. In sewage use, electrode holders must be installed 10 to
20 cm apart from one another. For
acids, alkalis and sea water, electrode
holders may be as much as 1 meter
apart to operate properly.
the surface of the electrode holder)
When resistance to
high pressure is required. Ideal for use
in tanks where temperature or pressure
inside the tank is
high, e.g. 250°C
250°C (without water
drips or vapor on the
surface of the
electrode holder)
RC
Electrode Separators
No. of electrodes
1 F03-14 1P
3 F03-14 3P
Model
1
61F-GP-N8
Selection Guide for Electrodes, Connecting, and Lock Nuts
Applicable liquids Material Models for individual electrode assembly components
Electrode (1m long) Connecting nut Lock nut
Purified city water,
industrial water,
sewage
Purified city water,
industrial water,
sewage, dilute alkaline solution
Equivalent
to SUS 304
(AISI-304)
SUS316
(AISI-316)
Model Indication
mark
F03-01 SUS201 1 line F03-02 SUS201 --- F03-03 SUS201 ---
F03-01 SUS316 2 lines F03-02 SUS316 6 F03-03 SUS316 6
Model Inscription Model Inscription
Specifications
61F-GP-N8
Model/Items General-purpose
Controlling materials
and operating
conditions
Supply voltage 24, 100, 110, 120, 200, 220, 230 or 240 VAC; 50/60 Hz
Operating voltage range 85% to 110% of rated voltage
Interelectrode voltage 8VAC 24 VAC 8VAC
Interelectrode current Approx. 1 mA AC max. Approx.
Power consumption Approx. 3.5 VA max.
Interelectrode operate
resistance
Interelectrode release
resistance
Response time Operate: 80 ms max.
Cable length
(see note 2)
Control output 1 A, 250 VAC (Inductive load: cosφ =0.4)
Ambient temperature Operating: --10°Cto55°C
Ambient humidity Operating: 45% to 85% RH
Insulation resistance
(see note 3)
Dielectric strength
(see note 4)
Life expectancy Electrical: 100,000 operations min.
Controller
61F-GP-N8
For control of ordinary purified water
or sewage water
Approx. 0 to 4 kΩ Approx. 0 to 1.3 kΩ
Approx. 15 k to
∞ Ω
Release: 160 ms max.
1kmmax. 2kmmax.
3 A, 250 VAC (Resistive load)
100 MΩ max. (at 500 VDC)
2000 VAC, 50/60 Hz for 1 min.
Mechanical: 5,000,000 operations min.
Long-distance
Controllers
61F-GP-N8L 2KM
(for 2 km)
61F-GP-N8L 4KM
(for 4 km)
For control of ordinary purified water
in cases where the
distance between
sewage pumps and
water tanks or between receiver
tanks and supply
tanks is long or
where remote control is required.
(for 2 km)
Approx. 0 to 0.5 kΩ
(for 4 km)
Approx. 4 k to ∞ Ω
(for 2 km)
Approx. 0.5 k to
∞ Ω (for 4 km)
4kmmax.
High-sensitivity
Controllers
61F-GP-N8H
61F-GP-N8HY
(see note 1)
For control of liquids with high specific resistance
such as distilled
water
0.4 mA AC max.
Approx. 15 kΩ to
70 kΩ
(see note 3)
Approx. 300 k to
∞ Ω
50 m max. 1kmmax. 800 m max.
Low-sensitivity
Controller
61F-GP-N8D
For control of liquids with low specific resistance
such as salt water,
sewage water, acid
chemicals, alkali
chemicals
Approx. 1 mA AC max.
Approx. 0 to 1.3 kΩ Approx. 0 to 2 kΩ
Approx. 4 k to ∞ Ω Approx. 15 k to
Two -wir ed
Controller
61F-GP-N8R
For control of ordinary purified water
or sewage water
used in combination with two-wiredtype electrode
holder (incorporating a resistor of
6.8 kΩ)
∞ Ω
Note: 1. The relay in the 61F-GP-N8H de-energizes when there is water present across the electrodes, whereas the relay in the 61F-GP-
N8HY energizes when there is water present across the electrodes.
2
61F-GP-N8
2. The length when using completely-insulated, 600-V, 3-conductor (0.75 mm2) cabtire cables. Usable cable lengths will become
shorter as the cable diameter or number of conductors becomes larger.
3. The insulation resistance and dielectric strength indicate values between power terminals and electrode terminals, between power
terminals and contact terminals, and between electrode terminals and contact terminals.
4. Possible to use with 10 kΩ or less, however, this may cause reset failure.
Internal Circuit Diagrams
61F-GP-N8/-N8L/-N8D/-N8HY 61F-GP-N8H
Power
supply
24 V
Control circuit
8 V (see note)
Power
supply
Note: 24 V for the 61F-GP-N8HY.
24 V
Control circuit
24 V
61F-GP-N8R
Power
supply
24 V
Control circuit
8V
Connections
61F-GP-N8
2
Automatic Water Supply and Drainage Control
1. Water Supply
Connect electromagnetic switch coil terminal A to terminal 2.
•
The pump stops when the water level reaches E1 and starts
•
when the water level drops below E2.
200-VAC power supply
MCCB
(See note 1
below.)
Contactor
THR
Reservoir
61F-GP-N8
(See note 2
below.)
2. Drainage
Connect the electromagnetic switch coil terminal A to terminal 3.
•
The pump starts when the water level reaches E1 and stops
•
when the water level drops below E2.
0V
200 V
Tank
8V
24 V
Control circuit
PS-3S
Stop
Start
Note: 1. The diagram shows the connections for water supply. When draining, change the connection from terminal 2 to terminal 3.
2. The earth terminal must be earthed.
3
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