CSM_61F-G_N_DS_E_3_1
1
Model Number Structure
■Model Number Legend
Position of
LED Indicator
Note: LED indicator is provided on
Controllers manufactured in
August 1999 or later.
It is not mounted on the case
surface. It can be seen
through the case.
1. Controller 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
1 2
61F-@N@
Floatless Level Switch (Compact Type)
61F-G@N
Improved Design for a More Lightweight
Construction and Reduced Standby Power
Consumption.
• Standby power reduced to 85% or less of previous models.
(Applicable to 61F-GN.)
• Weighs only 85% or less of previous models. (Applicable to
61F-G3N/-G4N.)
• Easy identification of operating status with LED operation
indicator.
• Increased reliability of internal relay (micro load: 5 VDC, 1 mA)
to enable PLC input.
• Electrode terminals and other wiring terminals are separated for
easy wiring.
• Select from three mounting methods: JEM, DIN rail mounting,
or screw mounting.
Note: LED operation indicator is provided on Controllers manufactured in
August 1999 or later.
Refer to Safety Precautions for Floatless Level
Controllers.
61F-G@N
2
Ordering Information
Note: 1. ◆: Automatic water supply and drainage control, : Automatic water supply control
2. Subclassified into 2 km and 4 km models according to the model of relay unit used. Specify 2 km or 4 km when ordering.
3. When ordering, specify the desired operating voltage at the end of the model number.
4. Contact your OMRON representative for products with voltages other than those listed above.
Classification by
control purpose
Classification by
application
General-
purpose
Long-distance
(between
Controller and
Electrodes)
(See note 2.)
High-sensitivity
(for high
specific
resistance)
Low-sensitivity
(for low
specific
resistance)
Two wire
Controller GN Models ◆61F-GN 61F-GNL 61F-GNH 61F-GND 61F-GNR
G1N Models w/pump idling
prevention
61F-G1N 61F-G1NL 61F-G1NH 61F-G1ND 61F-G1NR
w/alarm for
abnormally low level
G2N Models ◆ w/alarm for abnormally
high level
61F-G2N 61F-G2NL 61F-G2NH 61F-G2ND 61F-G2NR
G3N Models ◆ w/alarm for abnormally
high and low levels
61F-G3N 61F-G3NL 61F-G3NH 61F-G3ND 61F-G3NR
G4N Models w/level display of
water source and tank
61F-G4N 61F-G4NL 61F-G4NH 61F-G4ND 61F-G4NR
IN Models Level indication with
alarm
61F-IN 61F-INL 61F-INH 61F-IND 61F-INR
Relay unit 61F-11N 61F-11NL 61F-11NH 61F-11ND 61F-11NR
Example: 61F-GN[110/220 VAC]
Desired supply voltage
61F-G@N
3
Specifications
Standard Models
Note: 1. The @ in the model name represents G, G1, G2, G3, G4, or I.
2. The length when using completely insulated, 600-V, 3-core (0.75 mm2) cabtire cables. Usable cable lengths will become shorter as the
cable diameter or number of cores becomes larger due to increased floating capacity. For details, refer to Safety Precautions for Floatless
Level Controllers.
3. The insulation resistance and dielectric strength are the values between power terminals and Electrode terminals, between power
terminals and contact terminals, and between Electrode terminals and contact terminals. For details, refer to Safety Precautions for
Floatless Level Controllers.
4. Application is possible with 10 kΩ or less, however, this may cause reset failures.
Type
Items
General-purpose Controllers 61F-@N Long-distance
Controllers
61F-@NL 2KM (2 km)
61F-@NL 4KM (4 km)
High-sensitivity Controllers 61F-@NH
Controlling materials and
operating conditions
For control of ordinary purified water and
wastewater
For control of ordinary purified water and
wastewater. Particularly in cases where the
distance between the pumps and water tanks or
between supply and receiver tanks are far apart
or where remote control is required.
For control of liquids with high specific
resistance, such as distilled water
Rated voltage 100/200, 110/220 or 120/240 VAC, 50/60 Hz (both supported on same model)
Allowable voltage
fluctuation range
85% to 110% of rated voltage
Inter-electrode voltage 8 VAC
Inter-electrode current Approx. 1 mA AC max.
Power consumption GN@: 3 VA max., G1N@, G2N@, IN@: 4 VA max., G3N@: 5.5 VA max., G4N@: 8.5 VA max.
Inter-electrode operation
resistance
(recommended values)
0 to approx. 4 kΩ0 to 1.8 kΩ (for 2 km)
0 to 0.7 kΩ (for 4 km)
Approx. 10 kΩ to 40 kΩ (See note 4.)
Inter-electrode release
resistance
(recommended values)
Approx. 15 k to ∞Ω 4 k to ∞Ω (for 2 km)
2.5 k to ∞Ω (for 4 km)
Approx. 100 k to ∞Ω
Cable length
(See note 2.)
1 km max. 2 km max.
4 km max.
50 m max.
Output 3 A, 200 VAC (Resistive load)
Ambient operating
temperature
−10 to 55°C
Ambient operating
humidity
45% to 85%
Insulation resistance
(See note 3.)
100 MΩ min. (at 500 VDC)
Dielectric strength
(See note 3.)
2,000 VAC, 50/60 Hz for 1 min.
Life expectancy Electrical: 250,000 operations min.
Mechanical: 10,000,000 operations min.
Weight GN models: 315 g; G1N, G2N, IN models: 410 g; G3N models: 625g; G4N models: 870 g
Internal Circuit Diagrams Example: 61F-GN Example: 61F-GNL Example: 61F-GNH
S2
Tb
S1
Tc
S0
Ta
E3E2E1
U
U
U
24 V
8 V
200 V
100 V
0 V Transformer
61F-11N
Relay Unit
S2
Tb
S1
Tc
S0
Ta
E3E2E1
U
U
U
24 V
8 V
200 V
100 V
0 V Transformer
61F-11N
Relay Unit
S2
Tb
S1
Tc
S0
Ta
E3E2E1
U
U
U
24 V
8 V
200 V
100 V
0 V Transformer
61F-11N
Relay Unit
61F-G@N
4
Note: 1. The @ in the model name represents G, G1, G2, G3, G4, or I.
2. The length when using completely insulated, 600-V, 3-core (0.75 mm2) cabtire cables.
Usable cable lengths will become shorter as the cable diameter or number of cores
becomes larger due to increased floating capacity. For details, refer to Safety
Precautions for Floatless Level Controllers.
3. The insulation resistance and dielectric strength are the values between power
terminals and Electrode terminals, between power terminals and contact terminals,
and between Electrode terminals and contact terminals. For details, refer to Safety
Precautions for Floatless Level Controllers.
4. Application is possible with 10 kΩ or less, however, this may cause reset failures.
Type
Items
Low-sensitivity Controller 61F-@ND Two-wire Controller 61F-@NR
Controlling materials
and operating
conditions
For control of liquids with low specific
resistance, such as salt water, wastewater,
acid chemicals, or alkaline chemicals
For control of ordinary purified water
or wastewater. Used with a Two-wire
Electrode Holder (incorporating a
resistor of 6.8 kΩ)
Rated voltage 100/200, 110/220 or 120/240 VAC, 50/60 Hz (supported by the same model)
Allowable Voltage
Fluctuation
85% to 110% of rated voltage
Inter-electrode voltage 8 VAC
Inter-electrode current Approx. 1 mA AC max.
Power consumption GN@: 3 VA max., G1N@, G2N@, IN@: 4 VA max., G3N@: 5.5 VA max.,
G4N@: 8.5 VA max.
Inter-electrode
operation resistance
(recommended values)
0 to approx. 1.8 kΩApprox. 0 to 1.1 kΩ
Inter-electrode release
resistance
(recommended values)
Approx. 5 k to ∞ Ω Approx. 15 k to ∞ Ω
Cable length
(See note 2.)
1 km max. 800 m max.
Output 3 A, 200 VAC (Resistive load)
Ambient operating
temperature
−10 to 55°C
Ambient operating
humidity
45% to 85%
Insulation resistance
(See note 3.)
100 MΩ min. (at 500 VDC)
Dielectric strength
(See note 3.)
2,000 VAC, 50/60 Hz for 1 min.
Life expectancy Electrical: 250,000 operations min.
Mechanical: 10,000,000 operations min.
Weight GN models: 315 g; G1N, G2N, IN models: 410 g; G3N models: 625g;
G4N models: 870 g
Internal Circuit
Diagrams
Example: 61F-GND Example: 61F-GNR
S2
Tb
S1
Tc
S0
Ta
E3E2E1
U
U
U
24 V
8 V
200 V
100 V
0 V Transformer
61F-11ND
Relay Unit
S2
Tb
S1
Tc
S0
Ta
E3E1
U
U
U
24V
8V
200V
100V
0V Transformer
61F-11ND
Relay Unit
■Relay Unit
The Relay Unit can be replaced without
removing the wires for maintenance
inspections. It can also be replaced with
other Relay Units.
Compatibility with
General Purpose Model
(61F-11N)
Terminal Arrangement
General-
purpose
Controller
61F-11N ---
Long-
distance
Controllers
61F-11NL (for 2 km)
61F-11NL (for 4 km)
Provided
High-
sensitivity
Controllers
61F-11NH
Low-
sensitivity
Controller
61F-11ND
Two-wire
Controller
61F-11NR Not
provided
10 9 8 7 11
45 61 2 3
Tb1
ESS S
24 V8 V 24 V
Ta1 Tc1 Tc2 Ta2 Tb2
Relay Unit Circuit
Ordering Example
If you order the components listed
above, the corresponding Relay Unit
will be supplied with the Controller.
Example: If a 61F-GN Controller is
ordered, a 61F-11N Relay
Unit will also be included.
61F-G@N
5
■Connections
Automatic Water Supply Control
Compact Model
61F-GN
Dimensions
page 16
Automatic Water Supply Control
Contactor
Water supply
source
Motor protection
relay
61F-11N
Relay Unit
MCCB
RS
MP
T
220-VAC power supply
61F-GN
Stop
PS-3S
Star
t
(See note 1.)
E1
S0
S1
S2
Ta
U
U
8 V
U
Tc
Tb
E1
220 V
110 V
0 V 24 V
Transformer
E2
E3
E2
E3
Water
tank
•Connect contactor coil terminal to Tb.
•Connect to power supply terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E3 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
U1
Power
supply
PWater supply
(U indicator ON)
(U indicator OFF)
Pump OFF
Pump ON E2
E3
E1
Relay Unit Layout
The pump stops (U indicator ON)
when the water level reaches E1 and
starts (U indicator OFF) when the
water level drops below E2.
Principles of Operation
61F-G@N
6
Automatic Drainage Control
Compact Model
61F-GN
Automatic Drainage Control
Dimensions
page 16
Contactor
Wastewater
tank
Reservoir
Motor protection
relay
61F-11N
Relay Unit
MCCB
RS
MP
T
220-VAC power supply
61F-GN
PS-3S
(See note 1.)
E1
S0
S1
S2
Ta
U
8 V
U
U
Tc
Tb
E1
220 V
110 V
0 V 24 V
Transformer
E2
E3
E2
E3
Stop
Start
Connections
•Connect the contactor coil terminal to Ta.
•Connect to power supply terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E3 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
P
Water drainage
E2
E3
(U indicator ON)
(U indicator OFF)
Pump OFF
Pump ON E1
U1
Power
supply
Principles of Operation
Relay Unit Layout
•The pump starts (U indicator ON)
when the water level reaches E1
and stops (U indicator OFF) when
the water level drops below E2.
61F-G@N
7
Automatic Water Supply Control with Pump Idling Prevention
Compact Model
61F-G1N
Dimensions
page 16
Automatic Water Supply Control with
Pump Idling Prevention
Contactor
Alarm Bell
Water
supply
source
Motor
Protection
Relay
MCCB
RS
M
T
220-VAC power supply
61F-G1N
PS-3S
PS-3S
(See note 1.)
E1
S0
B
S1
S2
Tc2
Tb2
Tb1
Ta1
E1
E2
E3
E1'
E2'
(
Pushbutton switch
)
P
61F-11N
Relay Unit
8 V
U2
U1
U1
220 V
110 V
0 V 24 V
Transformer
U2
U2
24 V 61F-11N
Relay Unit
U1
E3
E2
E1'
E2'
E3
Start
Water
shortage
Stop
Water
tank
•Connect to power supply
terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
•Insert a pushbutton switch
(NO contact) between E1' and
E3 as shown by the dotted
line.
•Do not press the pushbutton
switch if the pump stops (U1
indicator OFF) during normal
operation after an alarm is
given for a low water level
(e.g., the water level does not
reach E2').
If the water supply source level
has not yet reached E1' when
starting the pump or after
recovering from a power
interruption, press the
pushbutton switch to start the
pump (U1 indicator ON) by
momentarily short-circuiting E1'
and E3.
Test Operation/
Recovering from
Power Interruptions
Note: 1. Be sure to ground the common Electrode E3 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
E
1
'
E
2
'
E
3
E
1
BL
E
2
E
3
P
Water tank
Water supply source
Water supply
Water
shortage
(U
1
indicator ON)
Pump OFF
Pump ON
(U
1
indicator OFF)
(U
2
indicator ON)
(U
2
indicator OFF)
U
1
U
2
Power
supply
Water supply source
Float
Amount of water for
one pump cycle
E1'
E2'
E3
Note
• Length of Electrode E1'
When installing the Controller in
locations where there is a possibility of
momentary power interrupts or blackouts,
the length of E1' should be made so that
the amount of water corresponding to
one pump cycle does not expose the
Electrodes. This will prevent the E2'
self-holding circuit from failing.
•The pump starts (U2 indicator
OFF) when the water level
drops below E2 and stops (U2
indicator ON) when water level
reaches E1.
•The pump is forced to stop
when the water supply source
level drops below E2' (U1
indicator OFF) to prevent the
pump from idling and gives an
alarm.
Relay Unit Layout
Principles of Operation
61F-G@N
8
Automatic Water Supply Control with Abnormal Water Shortage Alarm
Compact Model
61F-G1N
Dimensions
page 16
Automatic Water Supply Control with
Abnormal Water Shortage Alarm
Contactor
Alarm Bell
Water supply
source
Motor
Protection
Relay
MCCB
RS
M
T
220-VAC power supply
PS-4S
(See note 1.)
E1
B
(Pushbutton switch)
P
61F-G1N
S0
S1
S2
Tc2
Tb2
Tb1
Ta1
E1
E2
E3
E1'
E2'
(E4)
61F-11N
Relay Unit
8 V
U2
U1
U1
220 V
110 V
0 V 24 V
Transformer
U2
U2
24 V 61F-11N
Relay Unit
U1
E4
E3
Stop
Start
Water
shortag
e
E2
Water
tank
•Connect to power supply
terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
•Insert a pushbutton switch
(NO contact) between E3
and E4.
•If the pump stops upon
releasing the pushbutton
switch, keep pressing the
pushbutton switch.
•Connect the E4 electrode for
the water shortage alarm to
the E1’ terminal.
If the water level has not yet
reached E4 when starting the
pump or after recovering from
a power interruption, press
the pushbutton switch to start
the pump by short-circuiting
E3 and E4 (U1 indicator ON).
Test Operation/
Recovering from
Power Interruptions
Note: 1. Be sure to ground the common Electrode E3 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
U
1
U
2
Power
supply
BL
P
Water supply source
Water supply
Water
shortage
Pump OFF
Pump ON
(U
2
indicator ON)
(U
2
indicator OFF)
(U
1
indicator OFF)
E
1
E
2
E
4
E
3
•The pump stops (U2 indicator
ON) when the water level
reaches E1 and starts (U2
indicator OFF) when water level
drops below E2.
•If the water level drops below E4
for any reason, an alarm is given
(U1 indicator OFF).
Relay Unit Layout
Principles of Operation
61F-G@N
9
Automatic Water Supply with Abnormal Water Increase Alarm
Compact Model
61F-G2N
Dimensions
page 16
Automatic Water Supply with
Abnormal Water Increase Alarm
61F-11N
Relay Unit
8 V
U1
220 V
110 V
0 V 24 V
Transformer
U2
U2
24 V
U2
U1
61F-11N
Relay Unit
Contactor
Water supply
source
Water
tank
Reservoir
PS-4S
Motor
Protection
Relay
MCCB
Alarm Bell
RS
M
T
220-VAC power supply
61F-G2N
(See note 1.)
S0
B
S1
S2
Ta2
Ta1
Tc2
Tb1
Tc1
E1
E2
E3
E4
P
E1
E2
E3
Start
Stop
Full tan
k
E4
•Connect power supply
terminal S2 to terminal Tb1.
•Connect to power supply
terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E3 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
U
1
U
2
Power
supply
E4
B
E2
E3
Upper limit
Pump OFF
Pump ON
(U1 indicator ON)
(U2 indicator ON)
(U2 indicator OFF)
L
PWater supply
E1
Relay Unit Layout
•The pump starts (U2 indicator OFF)
when the water level reaches E2 and
stops (U2 indicator ON) when the
water level rises above E1.
•If the water level reaches E4 for any
reason, an alarm is given (U1
indicator ON).
Principles of Operation
61F-G@N
10
Automatic Drainage Control with Abnormal Water Increase Alarm
Compact Model
61F-G2N
Dimensions
page 16
Automatic Drainage Control with
Abnormal Water Increase Alarm
Reservoir
61F-11N
Relay Unit
8 V
U1
220 V
110 V
0 V 24 V
Transformer
U2
U2
24 V
U2
U1
61F-11N
Relay Unit
Contactor
Wastewater tank
PS-4S
Motor
Protection
Relay
MCCB
Alarm Bell
RS
M
T
220-VAC power supply
61F-G2N
(See note 1.)
S0
B
S1
S2
Ta2
Ta1
Tc2
Tb1
Tc1
E1
E2
E3
E4
E2
E3
P
Stop
Full tank
Start
E4
E1
•Connect power supply S2 to
terminal Ta1.
•Connect to power supply
terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E5 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
E4
B
E2
E3
Water tank
Upper limit
Pump OFF
Water drainage
Pump ON
(U1 indicator ON)
(U2 indicator ON)
(U2 indicator OFF)
L
P
E1
U
1
U
2
Power
supply
Relay Unit Layout
•The pump starts (U2 indicator ON)
when the water level reaches E1 and
stops (U2 indicator OFF) when the
water level drops below E2.
•If the water level reaches E4 for any
reason, an alarm is given (U1
indicator ON).
Principles of Operation
61F-G@N
11
Automatic Water Supply Control with Full Tank and Water Shortage Alarm
Compact Model
61F-G3N
Dimensions
page 17
Automatic Water Supply Control with
Full Tank and Water Shortage Alarm
Contactor
Alarm Bell
Lower limit
Upper limit
Water supply
source
MCCB
RS
M
T
220-VAC power supply 61F-G3N
PS-5S
E1
S0
S1
LH
PL
PL
B
LL
S2
Lc
Ta
Tc
Tb
B2
B1
E2
E1
To 61F-11N
Relay Unit
E3
E4
E5
Full tank
Stop
Start
Water shortage
220 V
110 V
0 V
Transformer
61F-11N
Relay Unit
61F-11N
Relay Unit
61F-11N
Relay Unit
Motor
Protection
Relay
(See note 1.)
P
U2
U2
U1
U1
U2
U3
8 V
24 V
24 V
U3
U3
U1
E3
E4
E5
E2
Water
tank
•Connect contactor coil terminal to Tb.
•Connect to power supply terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E5 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
U
1
U
2
U
3
Power
supply
E1
E3
E4
E5
Upper limit
Lower
limit
Pump OFF
Pump ON
(U1 indicator ON)
(U2 indicator ON)
(U2 indicator OFF)
(U3 indicator OFF)
B
LH
B
LL
PWater supply
E2
Relay Unit Layout
•The pump starts (U2 indicator ON)
when the water level reaches E2 and
stops (U2 indicator OFF) when the
water level drops below E3.
•If the water level rises to E1 for any
reason, the upper-limit indicator turns
ON and an alarm is given (U1 indicator
ON). If the water level drops below E4
for any reason, the lower-limit indicator
turns ON and an alarm is given (U3
indicator OFF).
Principles of Operation
61F-G@N
12
Automatic Drainage Control with Full Tank and Water Shortage Alarm
Compact Model
61F-G3N
Dimensions
page 17
Automatic Drainage Control with
Full Tank and Water Shortage Alarm
Contactor Alarm Bell
Lower limit
Upper limit
Wastewater
tank
Reservoir
MCCB
RS
M
T
220-VAC power supply 61F-G3N
PS-5S
E1
S0
S1
LH
PL
PL
B
LL
S2
LC
Ta
Tc
Tb
B2
B1
E2
E1
To 61F-11N
Relay Unit
E3
E4
E5
220 V
110 V
0 V
Transformer
61F-11N
Relay Unit
61F-11N
Relay Unit
61F-11N
Relay Unit
Motor
Protection
Relay
(See note 1.)
P
U2
U2
U1
U1
U2
U3
8 V
24 V
24 V
U3
U3
U1
E4
E5
Full tank
Start
Stop
Water shortage
E2
E3
•Connect contactor coil terminal to Ta.
•Connect to power supply terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
Note: 1. Be sure to ground the common Electrode E5 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
U
1
U
2
U
3
Power
supply
E1
E3
E4
E5
Upper limit
Lower
limit
Pump ON
Pump OFF
(U1 indicator ON)
(U2 indicator ON)
(U2 indicator OFF)
(U3 indicator OFF)
B
LH
B
LL
E2
Relay Unit Layout
•The pump starts (U2 indicator ON)
when the water level reaches E2 and
stops (U2 indicator OFF) when the
water level reaches E3.
•If the water level rises to E1 for any
reason, the upper-limit indicator turns
ON and an alarm is given (U1 indicator
ON). If the water level drops below E4
for any reason, the lower-limit indicator
turns ON and an alarm is given (U3
indicator OFF).
Principles of Operation
61F-G@N
13
Water Source Level Indication with Prevention of Pump Idling Due to Water Shortage, and Automatic Water Supply Control with
Indication of Water Level in Elevated Tank
Compact Model
61F-G4N
Dimensions
page 17
Water Source Level Indication with
Prevention of Pump Idling Due to Water
Shortage, and Automatic Water Supply
Control with Indication of Water Level in
Elevated Tank
Contactor
Water supply
source lower
limit
Water supply
source lower
limit
Water supply
source upper
limit
Water supply
source upper
limit
Elevated
tank water
shortage
Elevated
tank water
shortage
Elevated
tank repletion
Elevated
tank repletion
Water
supply
source
Motor Protection Relay
MCCB
RS
M
T
220-VAC power supply 61F-G4N
PS-5S
PS-4S E4
E5
E1
BL
1
BH
2
BL
2
LH
1
LL
1
LL
2
LH
2
T
c
T
c2
B
TA
S
0
S
1
S
2
BH
1
BL
1
BH
2
BL
2
LH
1
LL
1
LL
2
LH
2
BH
1
E4
E8
E2
E1
E3
E5
E6
E7
E8
Full tan
k
Stop
Start
Water
shortage
OFF
Lower limit
Upper limit
ON
(See note 1.)
(Pushbutton switch)
E6
P
61F-11N
Relay Unit
61F-11N
Relay Unit
61F-11N
Relay Unit
61F-11N
Relay Unit
61F-11N
Relay Unit
To 61F-11N
Relay Unit
220 V
U4
U3
U2
U5
U2
U5
U2
U4
U5
U1
U1
U3
X
U4
U1
U3
X
X
110 V
MY3 Relay
0 V
Transformer
8 V
24 V
24 V
X
E2
E7
E8
E3
E8
Water
tank
•Connect to power supply
terminals.
S0-S1: 110 VAC
S0-S2: 220 VAC
•Insert a pushbutton switch
(NO contact) between E2
and E8 as shown by the
dotted line.
•Do not press the
pushbutton switch if the
pump stops during normal
operation after an alarm is
given for low water level
(i.e., the water level has not
reached E3).
When starting the pump and
after recovering from a power
interruption, if the water
source level has not yet
reached E2 (U2 indicator
OFF), press the pushbutton
switch to start the pump by
momentarily short-circuiting
E2 and E8.
Test Operation/
Recovering from
Power Interruptions
Note: 1. Be sure to ground the common Electrode E8 (the longest Electrode).
2. The above wiring diagram is for a rated voltage of 110/220 VAC.
Connections
UX
1
U
2
U
3
U
4
U
5
Power
supply
Water supply source
Float
Float valve open
Amount of water for
one pump cycle
E2
E1
E3
E8
Precaution
• Length of Electrode E2
When installing the Controller in locations
where there is a possibility of momentary
power interruptions or blackouts, the
length of E2 should be made so that the
amount of water corresponding to one
pump cycle does not expose the
Electrodes. This will prevent the E3
self-holding circuit from failing.
Relay Unit Layout
•Insert four Electrodes in the water supply source and five
Electrodes in the elevated water tank.
•The lower-limit indicator for the water supply source remains
ON while the water source level is below E3 (U2 indicator
OFF).
•When the water level rises to E2, the lower-limit indicator turns OFF (U2 indicator
ON) and the pump is ready for operation.
•When the water level reaches E1, the upper-limit indicator turns ON (U3 indicator
ON).
•The water-shortage indicator for the elevated tank remains ON while the water level
in the elevated tank is below E7. The indicator turns OFF (U1 indicator ON) when the
water level rises to E7.
•The pump stops (U5 indicator ON) when the water level reaches E5 and starts (U5
indicator OFF) when the water level drops below E6.
•If the water level reaches E4 for any reason, the tank repletion indicator for the
elevated tank turns ON (U4 indicator ON).
Principles of Operation
61F-G@N
14
Liquid Level Indication and Alarm
Compact Model
61F-IN
Dimensions
page 16
Liquid Level Indication and Alarm
U1
U2
U1
U1
U2
U261F-11N
Relay Unit
8 V
220 V
110 V
0 V 24 V
Transformer
24 V 61F-11N
Relay Unit
Intermediate
Upper limit
Lower limit
Alarm Bell
Water supply
source
MCCB
RS
M
T
220-VAC power supply
61F-IN
PS-3S
(See note 1.)
E1
S0
S1
S2
