Relay
Control Relay
2. Type designation
N JYW 1 - □□/□
Rated power supply voltage
Length of electrode lead-wire:
L1: represents the max length of lead-wire is 1km
L2: represents the max length of lead-wire is 2km
Function code:
N: water supply, water drainage type
B: water supply and water drainage with
anti-exhausted of pump type
Design sequnce No.
Floatless relay
Company code
NJYW1 Floatless Relay
1. General
NJYW1 Series Floatless Relay is used in control circuit @
A.C. 50Hz/60Hz, up to 380V rated supply voltage for liquid
level automatic control at places of civil water tower, high
cistern, and underground conservation pool, etc. It is
capable to realize automatic water supply control or water
drainage control according to wiring requirement
of user.
This product is not applicable for level control for liquid
with poor conductivity such as oil, pure water, flammable &
explosive chemical liquid and high density sewage, etc.
3. Technical data
Type
NJYW1-NL1
NJYW1-BL1
NJYW1-NL2
Operating mode
Continuous working
Contact number
One group changeover contact
Ue/Ie:AC-15 220V/0.75A, 380V/0.47A; Ith:5A
Contact capacity
Operating voltage
AC 50Hz/60Hz 36V, 110V/220V, 220V/380V
AC 50Hz/60Hz 36V, 110V, 220V, 380V
24V
Control electrode voltage
Conductor length
Max 1km
Max 2km
Max 1km
Operating resistance
≤25kΩ
Releasing resistance
≥2kΩ
Response time
Ambient temperature
Power consumption
Installation mode
NJYW1-BL2
Max 2km
Reacting: max 80ms; releasing: max 160ms
-5℃~+40℃
<3VA
Guide rail type or device type
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Relay
Control Relay
4. Wiring diagram
Wiring diagram for NJYW1-NL1, NJYW1-NL2
water drainage mode 220V/380V
Wiring diagram for NJYW1-NL1, NJYW1-NL2
water supply mode 110V/220V
N
L
L1 L2
L3 N
QS
QS
S0 S1 S2
S0 S1 S2
E1
AC110V
AC220V
E1
AC220V
AC380V
Ta Tc Tb E3 E2
Ta Tc Tb E3 E2
KM
KM
KM
KM
M
M
Wiring diagram for NJYW1-NL1, NJYW1-NL2
water drainage mode 110V/220V
wiring diagram for NJYW1-BL1 and NJYW1-BL2
upper/lower water pool level control 220V
N
N
L
L
QS
QS
Upper water pool
S0 S1 E4 E5 E1
S0 S1 S2
AC220V
E1
AC110V
Ta Tc Tb E3 E2
AC220V
KM
Ta Tc Tb E3 E2
Lower water pool
KM
KM
KM
M
M
Note: IN NJYW1-BL1 or NJYW1-BL2, Ta,Tc,Tb are not one group of changeover contacts, among which Ta
& Tc are one group of independent normally open contacts; Tc & Tb are one group of normally closed
contacts
Wiring diagram for NJYW1-NL1, NJYW1-NL2
water supply mode 220V/380V
L1 L2
wiring diagram for NJYW1-BL1 and
NJYW1-BL2 upper/lower water pool level control 380V
L1 L2 L3 N
L3 N
QS
QS
Upper water pool
S0 S1 E4 E5 E1
S0 S1 S2
E1
AC380V
AC220V
AC380V
Ta Tc Tb E3 E2
Ta Tc Tb E3 E2
KM
KM
KM
Lower water pool
KM
M
Note: In NJYW1-BL1 or NJYW1-BL2, Ta,Tc,Tb are not one group of changeover contacts, among which Ta &
Tc are one group of independent normally open contacts; Tc & Tb are one group of normally closed
contacts
M
5. Overall and mounting dimensions (mm)
Profile and installation dimensions for NJYW1-NL1,
NJYW1-NL2, NJYW1-BL1, and NJYW1-BL2
5
70.5max
115max
60.2±0.37
45.5max
35.4±0.28
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Note: NJYW1-BL1 & NJYW1-BL2 can be used as water supply or
water drainage control independently, its wiring diagram
referring to NJYW1-NL1.