M-system R9EWTU User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 1 / 21
INSTRUCTION MANUAL
MULTI POWER MONITORING UNIT
(clamp-on current sensor CLSE, Modbus/TCP) MODEL R9EWTU
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■PACKAGE INCLUDES:
Multi power monitoring unit..............................................(1)
Upper mounting adaptor ....................................................(2)
■MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
This unit is programmable by using the PC Configurator
Software. For detailed information on the PC configuration,
refer to the PMCFG users manual. The PMCFG PC Con-
figurator Software is downloadable at M-System’s web site:
http://www.m-system.co.jp
POINTS OF CAUTION
■AUXILIARY POWER INPUT RATING & OPERATIONAL RANGE
• Locate the auxiliary power input rating marked on the
product and confirm its operational range as indicated
below:
100 – 240V AC rating: 85 – 264V, 50/60 Hz, < 9VA
110 – 240V DC rating: 99 – 264V, < 3W
■GENERAL PRECAUTIONS
• Before you remove or mount the unit, turn off the power
supply and input signal for safety.
• DO NOT set the switches on the module while the power
is supplied. The switches are used only for maintenance
without the power.
■ENVIRONMENT
• Indoor use.
• Do not install the unit where it is directly exposed to rain,
water droplets or sunlight.
• When heavy dust or metal particles are present in the
air, install the unit inside proper housing with sufficient
ventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -10 to +55°C
(14 to 131°F) with relative humidity within 30 to90% RH
in order to ensure adequate life span and operation.
■WIRING
• Wiring to the unit must be conducted by qualified service
personnel.
• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■AND ....
• The unit is designed to function as soon as power is sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 2 / 21
COMPONENT IDENTIFICATION
Terminal Block, Current Input 2
SD Card Slot
PC Configurator Connection Jack
RUN
LINK
LK100
COL
Status Indicator LED
Terminal Block, Current Input 1
RJ-45 Connector for
Modbus/TCP (Ethernet)
TOP VIEW
FRONT VIEW
Operating Mode Setting DIP SW (SW1)
Terminal Block,
Voltage Input / Auxiliary Power Supply
T1 3K
T2 3L
1718
89
1K 3K
1L 3L
1516
67
1K 3K
1L 3L
1314
45
1K 3K
1L 3L
1112
23
1K
1L
10
18ch 7ch8ch 6ch7ch 5ch6ch 5ch
8ch 7ch8ch 6ch7ch 5ch6ch 5ch
NC 1L
NC 1K
21
1110
3L 1L
3K 1K
43
1312
3L 1L
3K 1K
65
1514
3L 1L
3K 1K
87
1716
3L
3K
9
18
P1
4
U(+) V(−)
P2 P3
21
65
FE1
N
3
71ch 2ch1ch 3ch2ch 4ch3ch 4ch
1ch 2ch1ch 3ch2ch 4ch3ch 4ch
Unused
■STATUS INDICATOR LED
ID COLOR S TAT E FUNCTION
SDCard Red Blinking
approx. 1 Hz
The unit is preparing to write.
The LED starts blinking 30 seconds before the unit starts writing in the SD card on
the hour every hour.
DO NOT extract the card while the LED shows the blinking pattern until the writing
is complete.
2 sec.
SD card access error.
The unit is unable to normally write in the card because it is full or its data contents
are damaged.
2 sec.
SD card partial access error.
The unit was unable to write in the card for unknown reason but now is recovered. A
part of the data contents is missing.
OFF SD card not inserted.
ON SD card inserted.
Blinking
approx. 2 Hz
The unit is writing in the SD card.
DO NOT extract the card.
Power Red ON Normal
Blinking
approx. 0.5 Hz
Input overload or no input
Blinking
approx. 2 Hz
Setting error or device error
2 sec.
Internal calendar error or calendar backup battery life expired.
Re-set the calendar with the PC Configurator.
The LED blinks in the designated pattern every time when the power is turned on
after the battery life has been expired.
OFF Device error
RUN Red ON Normal communication
LINK Red ON 10BASE or 100BASE LINK
LK100 Red Blinking 100BASE transmitting/receiving
COL Red Blinking Collision

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 3 / 21
■OPERATING MODE SETTING
(*) Factory setting
• System Conguration (SW1-1, 2)
SW1-1 SW1-2 SYSTEM CONFIGURATION
OFF OFF Three-phase / 3-wire (*)
ON OFF Single-phase / 2-wire
OFF ON Single-phase / 3-wire
ON ON ---
• Balanced or Unbalanced Load (SW1-3)
SW1-3 BALANCED / UNBALANCED
OFF Unbalanced (*)
ON Balanced
• Clamp Sensor Type (SW1-4, 5, 6)
SW1-4 SW1-5 SW1-6 CLAMP SENSOR TYPE
OFF OFF OFF CLSE-R5 (5A) (*)
ON OFF OFF CLSE-05 (50A)
OFF ON OFF CLSE-10 (100A)
OFF OFF ON CLSE-20 (200A)
ON ON OFF CLSE-40 (400A)
OFF ON ON CLSE-60 (600A)
• Conguration Mode (SW1-8)
SW1-8 CONFIGURATION MODE
OFF DIP switch setting (*)
(PC Configurator setting is invalid.)
ON PC Configurator and communication
(DIP switch setting is invalid.)
Note 1: Turn on the power supply to the unit after setting
operating mode.
Note 2: Be sure to set unused SW1-7 to OFF.
Note 3: Clamp sensor type setting is common to all circuits.
Note 4: The sensor type and other settings for individual
circuit can be performed on the PC Configurator or via
Ethernet.
■TERMINAL ASSIGNMENTS
5
14 13
1L
1K 3K
4
3L
321
12 11 10
1L 3L 1L
1K 3K
9
18 17
T2
T1 3K
8
3L
76
16 15
6ch 6ch7ch 5ch 5ch8ch 7ch8ch
6ch 6ch7ch 5ch 5ch8ch 7ch8ch
1L 3L
1K 3K
1K
1 5ch 1L Ch.5, Current input 1L 10 5ch 1K Ch.5, Current input 1K
2 5ch 3L Ch.5, Current input 3L 11 5ch 3K Ch.5, Current input 3K
3 6ch 1L Ch.6, Current input 1L 12 6ch 1K Ch.6, Current input 1K
4 6ch 3L Ch.6, Current input 3L 13 6ch 3K Ch.6, Current input 3K
5 7ch 1L Ch.7, Current input 1L 14 7ch 1K Ch.7, Current input 1K
6 7ch 3L Ch.7, Current input 3L 15 7ch 3K Ch.7, Current input 3K
7 8ch 1L Ch.8, Current input 1L 16 8ch 1K Ch.8, Current input 1K
8 8ch 3L Ch.8, Current input 3L 17 8ch 3K Ch.8, Current input 3K
9 T2 Unused 18 T1 Unused
1 NC Unused 10 NC Unused
2 1ch 1L Ch.1, Current input 1L 11 1ch 1K Ch.1, Current input 1K
3 1ch 3L Ch.1, Current input 3L 12 1ch 3K Ch.1, Current input 3K
4 2ch 1L Ch.2, Current input 1L 13 2ch 1K Ch.2, Current input 1K
5 2ch 3L Ch.2, Current input 3L 14 2ch 3K Ch.2, Current input 3K
6 3ch 1L Ch.3, Current input 1L 15 3ch 1K Ch.3, Current input 1K
7 3ch 3L Ch.3, Current input 3L 16 3ch 3K Ch.3, Current input 3K
8 4ch 1L Ch.4, Current input 1L 17 4ch 1K Ch.4, Current input 1K
9 4ch 3L Ch.4, Current input 3L 18 4ch 3K Ch.4, Current input 3K
14
56
3K
3L 1L
15
1K
16 17 18
789
3K 1K 3K
3L 1L
10
12
NC
NC 1L
11
1K
12 13
34
3ch 3ch2ch 4ch 4ch1ch 2ch1ch
3ch 3ch2ch 4ch 4ch1ch 2ch1ch
3K 1K
3L 1L 3L
• Current Input 2
4
1
P1
U(+)
5
P2
6
23
P3
V(−) FE1
7
N
No. ID FUNCTION
1 U(+) Auxiliary power
(+)
2 V(−) Auxiliary power (−)
3 FE1 Power ground
4 P1 Voltage input P1
5 P2 Voltage input P2
6 P3 Voltage input P3
7 N Voltage input N
• Auxiliary Power Supply, Voltage Input
• Current Input 1
No. ID FUNCTION No. ID FUNCTION
No. ID FUNCTION No. ID FUNCTION

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 4 / 21
INSTALLATION
■WALL MOUNTING
Attach the upper mounting adaptors to the upper side of
the unit, and pull out the lower mounting adaptors from the
lower side. Fasten a M4 screw through the mounting hole
(4.5 mm dia.) of each adaptor. (torque 1.4 N∙m)
To remove the upper mounting adaptor from the unit, pull
it out while squeezing the latches as shown in the figure
below.
push push
■DIN RAIL MOUNTING
Set the unit so that the lower mounting adaptors are at the
bottom. Hook the upper hook at the rear side of the unit
onto the DIN rail and push in the lower part of the unit.
When removing the unit, pull out the unit while pushing
down the adaptors using a minus screwdriver.
DIN Rail (35 mm wide)
Mounting Adaptor
TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
■EXTERNAL DIMENSIONS unit: mm (inch)
6 (.24) 36−M3 SCREW TERMINAL
126 (4.96)
122 (DIN RAIL MOUNT)
115 (4.53) 140 (5.51)
DIN RAIL
35 mm wide
[4 (.16)]
6.5 (.25)
80 (3.15)
75 (2.95)
125 (4.92)
7.3 (.29)
7−M3.5 SCREW TERMINALS
4 − 4.5 (.18) dia. MTG HOLE

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 5 / 21
■CONNECTION DIAGRAM
5
6
4
7
8
9
1L
4
P1
5
6
7
P2
P3
N
11
1K
13
14
12
3K
15
16
17
18
2
3L
1
2
U(+)
V(−)
3
FE1 3
VOLTAGE
AUX. POWER SUPPLY
VOLTAGE INPUT
CURRENT INPUT 1
Ch. 1
CURRENT
1L
1K
3K
3L
Ch. 2
CURRENT
1L
1K
3K
3L
Ch. 3
CURRENT
1L
1K
3K
3L
1L
1K
3K
3L
1L
1K
3K
3L
1L
1K
3K
3L
1L
1K
3K
3L
Ch. 4
CURRENT
Ch. 5
CURRENT
Ch. 6
CURRENT
Ch. 7
CURRENT
Ch. 8
CURRENT
CURRENT INPUT 2
4
5
3
6
7
8
10
12
13
11
14
15
16
17
1
2
AUXILIARY
POWER SUPPLY
Modbus/TCP (Ethernet)
RJ-45 CONNECTOR
EXTENSION CONNECTOR

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 6 / 21
■INPUT WIRING
Use the model CLSE clamp sensor for current inputs.
The figure below shows only one circuit.
A maximum of eight (8) current sensor inputs can be connected (Ch. 1 through Ch. 8).
Grounding is not required for low voltage circuits.
N 1K 1L 3K 3L
L1
source load
N
L2
uv vu
UV VU kl
KL
kl
KL
N 1K 1L 3K 3L
L1
source load
N
L2
kl
KL
kl
KL
1K 1L
L1
source load
L2
L3
uv vu
UV VU kl
KL
1K 1L
L1
source load
L2
L3
kl
KL
N 1K 1L
L1
source load
N
kl
KL
uv
UV
N 1K 1L
L1
source load
N
kl
KL
System /
Application
Single-phase
/ 2-wire
Three-phase
/ 3-wire
balanced
load
Single-phase
/ 3-wire
1K 1L 3K 3L
L1
source load
L2
L3
uv vu
UV VU kl
KL
kl
KL
1K 1L 3K 3L
L1
source load
L2
L3
kl
KL
kl
KL
Three-phase
/ 3-wire
unbalanced
load
Terminal System /
Application Terminal
P1
P1
P1 P2 P3
P1 P2 P3
P1 P2 P3
P1 P2
P1 P3
P1 P3
P3
MOUNTING REQUIREMENTS unit: mm (inch)
Pitch 130 (5.12) min.
126 (4.96)
75 (2.95) 4–M4
■SINGLE MOUNTING
■BASIC + EXTENSION UNIT
Pitch 223 (8.78) min.
126 (4.96)
75 (2.95) 70.5 (2.78) 6–M4

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 7 / 21
WIRING INSTRUCTIONS
■SOLDERLESS TERMINAL
Refer to the drawing below for recommended ring tongue terminal size. Spade tongue type is also applicable.
• M3 Screw (current input)
Applicable wire size: 0.25 to 1.65 mm2(AWG22 to 16)
Torque: 0.5 N∙m
3.3 max. (.13)
6 max.
(.24)
mm (inch)
• M3.5 Screw (auxiliary power and voltage input)
Applicable wire size: 1.04 to 2.63 mm2(AWG16 to 14)
Torque: 0.8 N∙m
3.8 max. (.15)
7 max.
(.28)
mm (inch)
CHECKING ETHERNET CONNECTION
■IP ADDRESS
The R9EWTU does not support BootP Table Software. The IP Address and Subnet Mask can be configured using the PMCFG
Configurator Software.
The Modbus/TCP Port No. is fixed at 502.
■NODE ADDRESS
The R9EWTU firmware sets its Node Address to “01.”
The Node Address (ID) is sent via Modbus together with data. Set “01” with the application software of the user.
■CHECK WIRING
Connect an Ethernet cable to the RJ-45 connector.
■CHECK LED
When wiring is correct, LINK LED is turned on with 10BASE or 100BASE link.
When the module is receiving data with 100BASE, LK100 LED blinks.
■CHECK R9EWTU CONNECTION
Enter “ping command” on the Windows MS-DOS as follows:
C:¥WINDOWS>ping ***.***.***.***
(***.***.***.***: Enter IP address in decimal.)
ping ***.***.***.*** with 32 bytes of data:
Reply from ***.***.***.*** : bytes=32 time<10ms TTL=64
Reply from ***.***.***.*** : bytes=32 time<10ms TTL=64
Reply from ***.***.***.*** : bytes=32 time<10ms TTL=64
Reply from ***.***.***.*** : bytes=32 time<10ms TTL=64
Ping statistics for ***.***.***.***
Packets:Sent=4,Received=4,Lost=0(0% loss)
Replies in case of normal connection are as shown above. If the connection cannot be established normally due to e.g. wrong
IP address, other replies such as ‘time out’ will be received.

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 8 / 21
MODBUS - OPERATIONS
All registers are assigned to Holding Registers, which can be read out with Read Holding Registers or Read Input Registers
command. If reading an address with no assigned register is attempted, ‘0’ is given.
Write Multiple Registers command is used to write in registers. If writing an address with no assigned register is attempted,
‘Exception’ is given.
FUNCTION COMMAND EXPLANATION RECOMMENDED TIME OUT VALUE
03 Read Holding Registers Used to read registers 0.5 seconds
04 Read Input Registers Used to read registers 0.5 seconds
16 Write Multiple Registers Used to write in registers 2 seconds
These commands enable reading measured values and writing configurations.
One (1) word registers are represented in 16-bit integers, while two (2) word registers are in 32-bit. All registers are in the
form of signed integer unless specifically given in the explanations.
The lower digit word in a 32-bit register is assigned to the lower address (n), while the upper digit word is assigned to the
higher address (n+1).
Address n n + 1
Contents Lower digit word Upper digit word
The 32-bit register (2 words) must be read out and written in single command sequence.
It is recommended to wait for a time period indicated under ‘recommended time out value’ in the above table to receive a
response for a command. If no response is received for these time periods, take appropriate error processing such as retrying.
■MODBUS REGISTER ACCESS SETTING
ADDR. WORD PARAMETER
8977 2 Passcode entry for deactivating Modbus register write protection
Write a preset passcode in this register to deactivate the write protection via Modbus.
When the value set in this register matches the preset passcode, ‘1’ is set in the register address 8979 to en-
able writing in Modbus registers.
The value set in this register cannot be read out. It reads always ‘-1’ regardless of the set value.
When writing in the Modbus registers for setting change is complete, be sure to set a value (‘0’ is recom-
mended) other than the passcode to activate the write protection again.
8979 1 Modbus register access setting
0 : Write disable (*)
1 : Write enable
Other : Write disable
This setting is cleared when the power supply to the unit is removed. It always starts with ‘0’ (Write dis-
able) when the power supply is turned on. Set ‘1’ before writing in other registers.
Note that ‘1’ (Write enable) cannot be written in this register when the Modbus register write protection
passcode is preset and the write protection is enabled.
Be sure to write the correct passcode in the register address 8977 before changing the register setting from
‘0’ (Write disable) to ‘1’ (Write enable).
(*) Factory setting

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 9 / 21
■SYSTEM OPERATIONS
System operations include resetting accumulated values and rebooting.
ADDR. WORD PARAMETER
8993 1 Reboot system
Write ‘10001’ to reboot the system. (Any other values can be written but invalid.)
8994 2 Setting Modbus register write protection passcode
Set a passcode for enabling/disabling writing in registers via Modbus.
0 : Cancel write protection (*)
1 to 999 999 999: The set value is used as the passcode
Write the passcode in the register address 8977 before setting ‘1’ in the address 8979 to deactivate the write
protection.
The value in this register is encrypted when it is read out. Only ‘0’ (Cancel write protection) is read out as it
is.
When a new passcode is written, the register address 8979 is immediately reset to ‘0’ so as to limit the next
write command in access.
8996 1 Ch. 1 Reset count
Resetting specific count values among the channel 1 counts by writing a bit pattern as shown below.
Resetting is not executed for the bits set to ‘0.’
15Bit 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Current harmonic distortion, max.
Voltage harmonic distortion, max. *
Average power, max. / min.
Average current, max. / min.
Frequency, max. / min.
Power factor, max. / min.
Power, max. / min.
Current, max. / min.
Voltage, max. / min.
Average power
Average current
Energy count per time unit
To talized energy
*Resetting voltage related values is available only at Ch. 1.
8997 1 Ch. 2 Reset count
8998 1 Ch. 3 Reset count
: : :
9003 1 Ch. 8 Reset count
9004 1 Ch. 9 Reset count (DI 1 Reset count)
With the R9WTU-ED16 module, resetting specific count values among the DI 1 counts by writing a bit pat-
tern as shown below.
Resetting is not executed for the bits set to ‘0.’
15Bit 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Pulse count per time unit
To talized pulse count
With the R9WTU-EP8 module, Ch. 9 bit pattern is identical to that for Ch. 1.
9005 1 Ch. 10 Reset count (DI 2 Reset count)
9006 1 Ch. 11 Reset count (DI 3 Reset count)
: : :
9011 1 Ch. 16 Reset count (DI 8 Reset count)

R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6224 Rev.9 P. 10 / 21
MODBUS - SETTING
■SYSTEM SETTING
ADDR. WORD PARAMETER UNIT
9041 1 System configuration
0 : Single-phase / 2-wire (1CT)
1 : Single-phase / 3-wire (2CT)
2 : Three-phase / 3-wire, balanced load (1CT)
3 : Three-phase / 3-wire, unbalanced load (2CT) (*)
---
9042 1 Reserved
9043 1 Reserved
9044 2 VT rating, Primary
0 to 400 000 : Voltage (V)
Factory setting : 110
V
9046 1 VT rating, Secondary
50 to 500 : Voltage (V)
Factory setting : 110
The secondary can be set up to 500V. However, this does not mean the unit accepts 500V for
input. Do not use with the condition exceeding input rating written in the specification sheet
of the unit.
V
9047 1 Reserved
9048 1 Reserved
9049 1 Low-end cutout, Voltage
0 to 999 : Rated voltage × 0.001 × Specified value
Factory setting : 10
%/10
(*) Factory setting
■DEMAND SETTING
ADDR. WORD PARAMETER UNIT
9057 1 Average (demand) current update interval
1 to 30 : Minutes
Factory setting : 30
Data updated at the integral multiple minutes of the setting
(e.g. Setting = 15 minutes, Updated at 0, 15, 30, and 45 minutes every hour)
Minutes
9058 1 Average (demand) power update interval
1 to 30 : Minutes
Factory setting : 30
Data updated at the integral multiple minute of the setting
Minutes
■STYLE SETTING
ADDR. WORD PARAMETER
9073 1 Power factor (PF1 through PF3, PF) sign
0 : Standard (IEC), Identical to the active energy (*)
1 : Special type 1 (IEEE), Positive in LAG, Negative in LEAD
9074 1 Reactive power (Q1 through Q3, Q) sign
0 : Standard (IEC), Positive from PF = 1.0 to 180° in LAG direction; Negative for the other direction (*)
1 : Special type 1, Positive in LAG, Negative in LEAD
9075 1 Reactive power (Q1 through Q3) calculation (Q = Q1 + Q2 + Q3)
0 : Standard (*) Qn = √Sn2– Pn2
1 : Reactive power meter method Qn =
1
Nsmp
Nsmp
(Uni – Nui) Ii + (Nsmp / 4)
∑
i = 1
9076 1 Apparent power (S) calculation
0 : Standard (*) S = √P2+ Q2
1 : Sum S = S1 + S2 + S3
Note: ‘1,’ ‘2,’ ‘3’ in expressions like Q1, Q2, Q3 indicate ‘R,’ ‘S,’ ‘T phases’ respectively.