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Terminal  

device 

Terminal  

device 

Correct 

Not correct 

2. Parts Name

3. How to Mount

4.  Wiring

Front

Back

Dimensions

Recommended breaker: 3 -15A

Recommended fuse: Time-lag fuse Rated current 2A

RS485 communication wiring

Connection of KW9M and the other devices with 2-wire

 (unit: mm) 

(tolerance:±1.0)

Mounting bracket

 Terminal  

block A 

 Terminal  

block C 

 Terminal block B 

 Mounting screw: M4×10

 Display 

96

(45.7) 

(70.4) 

(25.6) 

56 

68

14 

91

 ±0.4

Panel mounting

Panel cut-out

1) Remove the mounting clips from 

the unit.

2) Insert the unit from the front of 

the panel.

3) Attach the mounting clips at the both

side of the case and secure in place 
with the screws.
(Tightening torque:

approx. 0.2 to 0.3N

m)

Applicable panel thickness: 1 to 5mm

Keep enough space for several mountings.
recommended space:
130mm the left, right, top and bottom
from center of the unit.

92

 ±0.5

92

 ±0.5

Terminal block A (upper) 10P 

Terminal block C (middle) 8P 

Terminal block B (lower) 10P 

No. 

Function 

No. 

Function 

No. 

Function 

Terminal 

Input voltage 

Phase and wire 

system 

Single-phase 

two-wire 

Single-phase 

two-wire 

Single-phase 

three-wire 

Three-phase 

three-wire 

Three-phase 

four-wire 

Terminal 

No. 

Power supply 

Measured 

voltage input 

L +  

RS485 

Output 1 

Output 2 

Input 1 

Input 2 

N

 -

V1 

V2 

V3 

Vn 

NC 

SG 

A + 

10 

OUT1 

IN1+  IN1

IN2+  IN2

COM1  OUT2  COM2 

AUX

Power supply)

Measured voltage input 

Measured current input 

vacant 

CT1 

CT1 

CT2 

CT2 

CT3 

CT3 

CTn 

CTn 

Power supply 

Breaker 

Load 

Primary side current 

Secondary side current 

 CT(secondary current 1A or 5A) 

Ammeter etc. 

without  

Ammeter 

3

2

1

6

k

4

5

VT (Voltage Transformer) 

L1(R) 
L2(S) 
L3(T) 

Breaker 

AUX 

(Power supply) 

X X

Terminal block A (upper)

3 - 6 

3 - 5 - 6 

3 - 4 - 5 - 6 

3 - 5 - 6 

85

264VAC

100

300VDC

1 -  2 

0

500VAC    

0

500V   

 ]

85

264V

100

300V

Item indication 

Sub-indication 

Log indication 

Keys 

Measured value 

Unit 

Lock mark 

Alarm indication 

Load ratio indication 

TX/RX mark 
Pulse output 
Pulse input 

Terminal block A 

Terminal block B 

Terminal block C 

Battery label 

Backup battery 

Mounting bracket 

Mounting bracket 

USB port 

Please remove and throw away the battery according 
to the instruction of your area when throwing the product. 

The input voltage to each terminal is as follows. 

Connect terminating resistors to the both end of the communication line including 
a upper device. Connect terminating resistors (120

Ω

 1/2W or more) between [A+] 

and [B-] of Eco-POWER METER connected the end of RS485 line.

Terminal block A 

(upper) 

Class D 

120

Ω

 1/2W or more

Upper device 
RS485 device 

SG 

SG 

8      9     10 

Terminal block A 

(upper) 

8      9     10 

A

B

SG 

A

B

Except KW9M 

KW9M terminal 

class D 

120

Ω

1/2W or more

Terminal device  

except KW9M 

terminal connection 

To RS485 device 

Shielded cable 

Shielded cable 

Shielded cable 

Short-circuit [

] to [E].

Do not connect

   shielded cable to [E].

Do not connect

   shielded cable to [E].

Connect

KW9M 

Terminal 

Terminal 

Except terminals 

SG  A

B

SG  A

B

1. Before use

5. Wiring Diagram

6. How to attach Current Transformer

8. For Input Connection

7. For RS485 Connection

Eco-POWER METER is designed chiefly to manage saving energy.

It is neither intended nor can it be legally used for billing.

Eco-POWER METER is designed to be used installing in a control panel.

Please use Eco-POWER METER according to the specification described.

 

Otherwise, it may malfunction or cause fire and an electric shock.

 ・

Connect Eco-POWER METER to the power supply in compliance with 

  

the rating.

 ・

Refer to the wiring diagram to ensure proper wiring for the power 

  

supply, input and output.

 ・

Use an electric wire applicable to the rated current.

 ・

Do not perform wiring or installation with a live line. It may also lead 

     to circuit burnout or fire by way of the secondary CT side opening.

Do not connect voltage input, current input, pulse input wires parallel 

to high-voltage or power cables and avoid using the same conduit.

Use shielded wires as short as possible.

Do not turn on the power supply or input until all wiring is completed.

Do not use at secondary side circuit of inverter. It might cause exothermic 

heat or damage.

If additional noise effects power supply line, voltage input line, current 

input line, incorrect measurements may result.

Installation and wiring must be performed by expert personnel for 

electrical work or electric piping.

Please wipe dirt of the main unit with soft cloth etc.When thinner is used,

the unit might deform or be discolored.

Do not add an excess power to the display. It might break the inner liquid

crystal.

I n s t a l l a t i o n   i n s t r u c t i o n s  

KW9M Eco-POWER METER 

Advanced Type

Read these instructions carefully for proper installation. 
After installation, keep it in a safe place for reference when required. 

You can download the user's manual from our website. 

For User's manual 

For your safety, make sure to satisfy the following conditions.

Overvoltage category:

, Pollution degree 2

Indoor use

An ambient temperature of -25 to 55

An ambient non-condensing humidity of 30 to 85%RH (at 20

)

Altitude of 2000m or less

Do not use in the following environments.

Where it will be exposed to direct sunlight

Where inflammable or corrosive gas might be produced

Where it will be exposed to excessive airborne dust or metal particles

Where it will be exposed to water, oil or chemicals

Where direct vibration or shock might be transmitted

Where the place near high-voltage cable, power line or machineries which

   occurs the big switching serge.

Be sure to wire correctly according to the wiring diagrams. 

Please connect breakers or fuses to the power supply input part for  

     safety reasons and to protect the device. 
     This product has no built-in power switch, circuit breaker or fuse. 
     Therefore it is necessary to install them in the circuit near this unit. 

Do not turn on the power supply or input until all wiring is completed. 

Never open the secondary circuit of CT under applying current to load, 

     never remove the terminal block under applying current to load, it will  
     cause electric shock or breakdown CT. 

Terminal arrangement

Use CT that the secondary side current is 5A or 1A.

One CT is needed for 1 unit when measuring 1P2W (2 CTs for 2-circuit,

    3CTs for 3-circuit). Two CTs are needed when measuring 1P3W/3P3W. 
    Three CTs are needed when measuring 3P4W (4 CTs to measure N-phase). 
    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.

How to connect CT

(1) Power off the measured devices.
(2) Install applicable CT.
(3) Remove terminal block of KW9M.
(4) Connect CT to the terminal block.
(5) Insert terminal block to KW9M surely.
(6) After confirm all wiring correct, turn on the power of the load

 

 and KW9M.

* Connect CT wiring and terminal block surely. 

It will cause CT breakdown. 

* Never remove the terminal block under applying current to 

load. It will cause electric shock or breakdown CT. 

Pulse input 

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.

V

CEO

=20V min. I

C

=20mA min. I

CBO

=6µA max.

   Use transistors with a residual voltage of less than 2V when the transistor
   is ON.
*Short-circuit impedance should be less than 1k

Ω

Open-circuit impedance should be more than 100k

Ω

.

Leak current in shorted is about 10mA.

Input wiring

   Please wire up as short as possible by using a shielded wire or a metallic 
   electric wire tube individually.

9. For Output Connection

PhotoMOS relay output

PhotoMOS relay is mounted in this product, therefore it has no polarity.

Wire up to 100m for output connection.

When using VT(voltage transformer)

1P2W 

3P4W 

1P3W

3P3W

AUX 

CT3 

L1(R) 

L2(N/S) 

L3(T) 

X X

X X

L+  N-  V1 V2 V3 Vn NC SG A+

B- 

CT1 

CT1 

CT2 

CT2 

CT3 

CT3 

CTn 

CTn 

CT1 

Connect CTn to measure N-phase. 
CTn is not necessary for normal measurement.  

AUX 

CT1 

CT2 

CT3 

L1(R) 

L2(S) 

L3(T) 

CTn 

(To measure 

 N-phase) 

X X

X X X

L+  N-  V1 V2 V3 Vn NC SG A+

B- 

CT1 

CT1 

CT2 

CT2 

CT3 

CT3 

CTn 

CTn 

Terminal block A (upper) 

Terminal block B (lower) 

Breaker 

(To measure 

 3-circuit) 

(To measure 3-circuit) 

AUX 

(Power supply) 

Breaker 

(Power supply) 

Breaker 

(Power supply) 

Power  

supply side 

Load side 

Power  

supply side 

Load side 

Power  

supply side 

Load side 

CT1      CT2             CT3 

L1(R) 

X X

L+  N-  V1  V2 V3 Vn NC SG  A+  B- 

CT1 

CT1 

CT2 

CT2 

CT3 

CT3 

CTn 

CTn 

1 2 3 4 5 6 7 8 9  

1 2 3 4 5 6 7 8

Terminal block A (upper) 

Terminal block B (lower) 

1 2 3 4 5 6 7 8 9  

1 2 3 4 5 6 7 8

10 

10 

Terminal block A (upper) 

Terminal block B (lower) 

1 2 3 4 5 6 7 8 9  

1 2 3 4 5 6 7 8

10 

 1     2    3    4    5    6     7    8    9   10 

Applicable wire (Crimp-type terminal is recommended.

)

Applicable ferrules (by Weidmuller)

Terminal block:  A 

Stripping length: 7 to 8mm

Screw size: M2.5  
Tightening torque: 0.4 to 0.5N

m

Sectional area

*Use shielded wire for RS485 communication.

*Use applicable wire according to the measured current.

*Only for terminal block A and B. It cant be used for C.

single /stranded wire 0.5 to 4mm

2

(AWG20 to12)

for 2pcs. 

   single/stranded wire 2pcs.×0.5 to 2mm

2  

(AWG20 to 14)

Power supply/Measured voltage/RS485 communication

Terminal block:  C 
Screw size: M2  
Tightening torque: 0.2 to 0.25N

m

Sectional area:

single /stranded wire 
0.5 to 1.5mm

2

(AWG20 to16)

Output/Input

Terminal block:  B 
Screw size: M2.5  
Tightening torque: 0.4 to 0.5N

m

Sectional area:

single /stranded wire 
0.5 to 4mm

2

(AWG20 to12)

CT Input (Measured current)

Wire size 

0.75mm

1.25mm

2mm

2

  *

For 1pc. 

For 2pcs. * 

Name 

Part number 

Name 

Part number 

H0.75/14D GR 

H1.5/14D SW

H2.5/15D BL

9019040000 

9019120000

9019160000

H0.75/14D ZH GR  H1.5/16D ZH SW

9037410000 

9037470000

Vn terminal should be connected to N-phase which is grounded.
The input number 6 of terminal block A has to be connected to protective earth 
to ensure installation safety.

IN

5 or 7

IN

6 or 8

Photo 

-coupler 

OUT 

Output (rated capacity 30V AC/DC, 0.1A) 

COM 

1 or 3 

2 or 4 

Internal circuit 

Internal circuit 

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com

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