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Floatless Level Switch (Compact, Plug-in Type)
61F-GP-N@
Space-saving Design Ideal for Control Panel
Downsizing. Easy Maintenance.
• Compact: 49.4 × 38 × 84 mm (H×W×D).
• Easy identification of operating status with LED operation
indicator.
• Independent DPDT contacts on 11-Pin Models.
• CE marking and UL/CSA compliance.
CSM_61F-GP-N__DS_E_6_1
Refer to Safety Precautions for Floatless Level
Controllers.
Model Number Legend
61F-GP-@@
12
1. No. of Pins
N: 11 pins
N8: 8 pins
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
T: High-temperature
Position of LED indicator
Ordering Information
Type
11-pin
General-purpose
Model
61F-GP-N
Long-distance (for 2 km)
Model
61F-GP-NL 2KM
Long-distance (for 4 km)
Model
61F-GP-NL 4KM
Type
11-pin
High-sensitivity
Model
61F-GP-NH
Low-sensitivity
Model
61F-GP-ND
Two-wire
Model
61F-GP-NR
Type
8-pin
Tropical environments
Model
61F-GP-N-TDL
High-temperature
Model
61F-GP-NT
Type
8-pin
General-purpose
Model
61F-GP-N8
Long-distance (for 2 km)
Model
61F-GP-N8L 2KM
Long-distance (for 4 km)
Model
61F-GP-N8L 4KM
Type
8-pin
High-sensitivity
Model
61F-GP-N8H
61F-GP-N8HY
Low-sensitivity
Model
61F-GP-N8D
Two-wire
Model
61F-GP-N8R
Note: When ordering, specify the desired operating voltage at the end of the model number.
Example: 61F-GP-N [220 VAC]
Desired supply voltage
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Compact Plug-in Models (11-pin Type)
61F-GP-N@
Specifications
Item
General-purpose
Controller
61F-GP-N
High-
temperature
Controller
61F-GP-NT
Long-distance High-sensitivity Low-sensitivity
Controllers
Controller
Controller
61F-GP-NL 2KM
(for 2 km)
61F-GP-NL 4KM
(for 4 km)
61F-GP-NH
(see note 4)
61F-GP-ND
Two-wire
Controller
61F-GP-NR
Controlling materials
and operating condi-
tions
For control of ordi- For control of ordi- For control of ordi- For control of liq- For control of liq- For control of ordi-
nary purified water nary purified water nary purified water uids with high spe- uids with low spe- nary purified water
or sewage water or sewage where in cases where the cific resistance cific resistance or sewage water
operating ambient distance between such as distilled such as salt water, used in combina-
temperature is sewage pumps water
sewage water, tion with Two-wire
high.
and water tanks or
acid chemicals, al- Electrode Holder
between receiver
kali chemicals (incorporating a
tanks and supply
resistor of 6.8 kΩ)
tanks is long or
where remote con-
trol is required.
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 8 VAC
Interelectrode current Approx. 1 mA AC max.
Approx. 0.12 mA Approx. 1 mA AC max.
AC max.
Power consumption Approx. 3.5 VA max.
Interelectrode operate 0 to approx. 4 kΩ
resistance
0 to approx. 4 kΩ
0 to approx. 1.3 kΩ Approx. 10 kΩ to
(for 2 km)
approx. 40 kΩ
0 to approx. 0.5 kΩ (see note 3)
(for 4 km)
0 to approx.
1.3 kΩ
0 to
approx. 2 kΩ
Interelectrode release Approx. 15 k to
resistance
∞Ω
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
Approx. 4 k to ∞ Ω Approx. 15 k to
∞Ω
Response time
Operate:80 ms max.
Release:160 ms max.
Cable length
(see note 1)
1 km max.
600 m max.
2 km max.
4 km max.
50 m max.
1 km max.
800 m max.
Control output
1 A, 250 VAC (Inductive load: cosφ = 0.4)
3 A, 250 VAC (Resistive load)
Ambient temperature Operating:–10 to 55°C (–10 to 70°C for high-temperature controller)
Ambient humidity
Operating:45% to 85% RH
Insulation resistance 100 MΩ min. (at 500 VDC)
(see note 2)
Dielectric strength
(see note 2)
2000 VAC, 50/60 Hz for 1 min.
Life expectancy
Electrical: 100,000 operations min.
Mechanical: 5,000,000 operations min.
Weight
Approx. 155 g
Accessories
Hold-down clip PFC-N8
Note: 1. 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. For details, refer to Safety Precautions for Floatless Level Controllers.
2. 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. For details, refer to Safety Precautions for
Floatless Level Controllers.
3. Possible to use with 15 kΩ or less, however, this may cause reset failure.
4. 61F-GP-NH High-sensitivity Controller uses advanced operation.
When the power supply voltage is applied, if there are some liquids between the electrodes (ground and operation electrodes), the inter-
nal relay will not operate.
When the power supply voltage is applied, if there are no liquids between the electrodes (ground and operation electrodes), the internal
relay will operate.
If the advanced operation does not satisfy applications, consider using 61F-N8HY controller which uses sequential operation.
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Internal Circuit Diagrams
61F-GP-N/-NT/-NL/-ND
Power supply
24 V Control circuit
8 V (See note.)
UU
61F-GP-NH
Power supply
24 V Control circuit
8 V (See note.)
UU
61F-GP-N@
61F-GP-NR
Power supply
24 V Control circuit
8V
U
U
3 9 4 5 11 10 1 7 6 8
39
4 5 11 10 1 7 6 8
39
S0 S1 E3 E1 Ta1 Tc1 Tb1 Ta2 Tc2 Tb2
S0 S1
E3 E1 Ta1 Tc1 Tb1 Ta2 Tc2 Tb2
S0 S1
Note: When applying a self-holding circuit, short between terminals 5 and 6 and use terminal 7 as E2.
4
E3
5 11 10 1
E1 Ta1 Tc1 Tb1
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Connections
Automatic Water Supply and
Drainage Control
Automatic Water Supply Control
Connections
Commercial Voltage
RST
MCCB
61F-GP-N
8765
U4
0V
Power
supply
24 V
8V
Control
circuit
U
U
39
10 11 1 2
Contac-
tor
Motor
protection
relay
(See note.)
PS-3S
Water supply
source
Water
tank
E1
E3 E2
Stop
Start
MP
Note: Be sure to ground the common Electrode E3 (the
longest Electrode).
Connection Sockets
PF113A (Front-connecting)
PL11 (Rear-connecting)
Connect terminal 1 to the contactor’s coil terminal.
Note: The power supply depends on the specifications of the
model.
Principles of Operation
Water
supply
P
Pump OFF
E1
(Indicator ON)
61F-GP-N@
Compact, Plug-in Type
61F-GP-N
Dimensions:
page 14
Connections
Automatic Drainage Control
Commercial Voltage
RST
MCCB
61F-GP-N
8765
U4
0V
Power
supply
24 V
Control
circuit
8V
U
U
3
10 11 1
9
2
Contac-
tor
Motor
protection
relay
(See note.)
PS-3S
Waste-
Start
water
E1
M
tank
P
E3 E2
Stop
Reservoir
Note: Be sure to ground the common Electrode E3 (the
longest Electrode).
Connection Sockets
PF113A (Front-connecting)
PL11 (Rear-connecting)
Connect terminal 1 to the contactor’s coil terminal.
Note: The power supply depends on the specifications of the
model.
Principles of Operation
Pump ON
E1 (Indicator ON)
Pump ON
E2
E3
(Indicator OFF)
Pump OFF
E2
E3
(Indicator OFF)
P
Water drainage
The pump stops when the water level reaches E1 (indicator ON)
and starts when the water level drops below E2 (indicator OFF).
The pump starts when the water level reaches E1 (indicator ON)
and stops when the water level drops below E2 (indicator OFF).
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Liquid Level Indication
(Connection Example)
Connections
Commercial Voltage
RST
MCCB
Lower limit
61F-GP-N
8765
U4
0V
24 V
Control
circuit
U
Power
supply
3
8V
U
9
10 11 1 2
Liquid Level Indication
Intermediate
61F-GP-N
87 65
U4
0V
24 V
Control
circuit
U
Power
supply
3
8V
U
9
10 11 1 2
61F-GP-N@
Compact, Plug-in Type
61F-GP-N
Dimensions:
page 14
Upper limit
61F-GP-N
87 65
U4
0V
24 V
Control
circuit
U
Power
supply
3
8V
U
10 11 1
9
2
(See note.)
Water supply
source
MP
Water
tank
PS-4S
E1
E2
E3
E4
Upper limit
Intermediate
Lower limit
Note: The power supply phases (terminals 3 to 9) can be matched to use the same ground for the
common Electrode (the longest Electrode, terminal 4).
Principles of Operation
Terminals 6 and 7, and terminals 10 and 11 on the lower -limit 61F-GP-N are shorted when the water level reaches E3 (indicator ON).
Terminals 6 and 7, and terminals 10 and 11 on the intermediate 61F-GP-N are shorted when the water level reaches E2 (indicator ON).
Terminals 6 and 7, and terminals 10 and 11 on the upper-limit 61F-GP-N are shorted when the water level reaches E1 (indicator ON).
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