8A3 M56 7000 3
3-wire resistance
temperature detectors
input
An
Bn
bn
470Ω
Multi-
plexer
A/D converter
Internal circuit
*Notes on resistance temperature detectors input signal wiring
・For copper wires for wiring, use thick wires having insulation
performance of IEC60227-3 or equivalent to prevent a large increase
in the electricresistance. (It is recommended to use shielded wires
and to ground the shielding.)
・Do not have the resistance temperature detectors input wiring close to
AC wires, power wires, or load.
L1(R)
L2(N/S)
L3(T)
K L
CT1
CT2
CT3
L1(R)
L2(S)
L3(T)
N
K L
Voltage input terminals
(Main Unit)
CT1 CT2 CT3
L1(R)
N
Ｘ Ｘ
ＸＸ
ＸＸＸ
L+ N- V1 NC V2 NC V3 NC Vn
CH1
CT1 CH1
CT2
k
CH1
CT2 CH1
CT3
k
CH1
CT3 CH2
CT1
k
CH2
CT1
CT1 CT2 CT3
K L
1 2 1 2 3 4 5 1 2 3 4 5 66 7
CH1
CT1
k
CH2
CT2
k
CH2
CT2 CH2
CT3
k
CH2
CT3
Power supply
terminals
(Main Unit)
Current input terminals
(Expansion Unit : Upper)
CT1
CT3
Ｘ Ｘ
L+ N- V1 NC V2 NC V3 NC Vn
CT1
CT3
1 2 1 2 3 4 5 6 7
ＸＸＸ
Ｘ Ｘ
L+ N- V1 NC V2 NC V3 NC Vn
Ｘ
1 2 1 2 3 4 5 6 7
CT1
CT2
CT3
1P2W
Breaker
(Power supply)
AUX
Power
supply side
(To measure
each-circuit ) ( To measure
each-circuit )
( To measure
each-circuit )
( To measure
each-circuit )
( To measure
each-circuit )
( To measure
each-circuit )
( To measure
each-circuit )
Load side
1P3W／3P3W
Breaker
(Power supply)
AUX
Power
supply side
Load sideLoad side
3P4W
Breaker
(Power supply)
AUX
Power
supply side
Load sideLoad side
Vn terminal should be connected to N-phase which is grounded.
123456
Power supply
terminals
(Main Unit)
Voltage input terminals
(Main Unit)
CH1
CT1 CH1
CT2
k
CH1
CT2 CH1
CT3
k
CH1
CT3 CH2
CT1
k
CH2
CT1
123456
CH1
CT1
k
CH2
CT2
k
CH2
CT2 CH2
CT3
k
CH2
CT3
123456
Current input terminals
(Expansion Unit : Lower)
Current input terminals
(Expansion Unit : Upper)
Current input terminals
(Expansion Unit : Lower)
Power supply
terminals
(Main Unit)
Voltage input terminals
(Main Unit)
CH1
CT1 CH1
CT2
k
CH1
CT2 CH1
CT3
k
CH1
CT3 CH2
CT1
k
CH2
CT1
123456
CH1
CT1
k
CH2
CT2
k
CH2
CT2 CH2
CT3
k
CH2
CT3
123456
Current input terminals
(Expansion Unit : Upper)
Current input terminals
(Expansion Unit : Lower)
・Use CT that the secondary side current is 5A or 1A.
・One CT is needed when measuring 1-circuit of 1P2W.
Two CTs are needed when measuring 1P3W/3P3W (4 CTs for 2-circuit).
Three CTs are needed when measuring 3P4W (6 CTs for 2-circuit).
Using all CTs for one unit should be the same.
・Use the applicable wire, or it might cause a breakdown, burnout or
electric shock.
・When connecting CT, connect the secondary side to the terminal of the
main unit first, and after that wire the primary side to a load electric wire.
Incorrect order might cause an electric shock or break CT.
・The CT has polarity. Wire correctly according to the K and L marks.
Wrong direction can’ t measure correctly.
・If there is some distortion by harmonic or waveform, it may not measure
correctly. Please check with the actual system before adopts it.
・Separate the wiring (strong electric part) of the measured voltage input
terminal (operating power supply terminal) from the CT cable.
It may not satisfy the accuracy due to noise.
5. How to attach Current Transformer
・Recommended breaker: 3 -15A (IEC approved or UL listed)
・Recommended fuse: Time-lag fuse Rated current 2A
(IEC approved or UL listed)
6. Wiring Diagram
7. For Input Connection
・Contact input
Use highly reliable metal plated
contacts. Since the contact’ s bounce
time leads directly to error in the count
value, use contacts with as short
a bounce time as possible. In general,
select 30Hz for max. counting speed.
・Non-contact input (Transistor input)
Connect with an open collector.
Use the transistor with the following specifications.
VCEO=20V min. IC=20mA min. ICBO=6µA max.
Use transistors with a residual voltage of less than 3V when the transistor
is ON.
*Short-circuit impedance should be less than 1kΩ.
Open-circuit impedance should be more than 100kΩ.
(When the impedance is 0 Ω, drain current is approx. 10mA.)
・Input wiring
Please wire up as short as possible by using a shielded wire or a metallic
electric wire tube individually.
◆Pulse input
R
RIN＋
IN－
Photo
-coupler
Internal circuit
8. For Output Connection
◆PhotoMOS relay output
OUT
COM
Internal circuit
・It adopts PhotoMOS relay output, there is no polarity.
Output: Rated capacity 30V AC/DC,0.1A
・Do not connect devices that voltage or
load exceeds the rated capacity
(30V AC/DC,0.1A)
・Please wire less than 100m for output.
If it is long, it may not work correctly
due to floating capacitance.
●Power measurement
Twisted -pair shielded wire
V/I
COM
CH1 CH2 CH3
Analog equipment Eco-POWER METER
・Use double-core twisted-pair shielded wires. It is recommended to ground
them. However, depending on the conditions of the external noise, it may
be better not to ground the shielding.
・Do not have the analog input wiring close to AC wires, power wires, or load.
・Digital conversion value is not stable when it is not wired.
・Resistance temperature detectors input
(Pt100, Pt1000)
◆Analog input (Multi analog input type)
◆RTD input (Multi analog input type)
Voltage input terminals
(Main Unit)
CT1
L1(R)
N
Ｘ Ｘ
ＸＸ
L+ N- V1 NC V2 NC V3 NC Vn
CH1
CT1 CH1
CT2
k
CH1
CT2 CH1
CT3
k
CH1
CT3 CH2
CT1
k
CH2
CT1
CT1
ground
K L
1 2 1 2 3 4 5 1 2 3 4 5 66 7
CH1
CT1
k
CH2
CT2
k
CH2
CT2 CH2
CT3
k
CH2
CT3
Power supply
terminals
(Main Unit)
Current input terminals
(Expansion Unit : Upper)
Breaker
(Power supply)
AUX
Power
supply side
123456
Current input terminals
(Expansion Unit : Lower)
●Leak current measurement (Only Expansion unit CH2)
By inputting the ground line of the equipment to CT input or direct
current input, it is possible to measure the leakage current of the ground,
and it can be used as equipment maintenance.
①③⑤
②④⑥
Load
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