M-system 53U User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 1 / 8
INSTRUCTION MANUAL
MULTI POWER MONITOR
(4 digital displays) MODEL 53U
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 monitor
(Body + Mounting bracket × 2 + gasket)............................(1)
■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.
For detailed explanations to operate and program the mod-
ule, please refer to Model 53U Operating Manual (EM-
6485-B).
The 53U is programmable either by using the front control
buttons or the PC Configurator Software. For detailed in-
formation on the PC configuration, refer to the PMCFG us-
ers manual.
Software and manuals are downloadable at M-System’s
web site: http://www.m-system.co.jp
■INTENDED USE
This equipment is a digital panel meter which measures
simultaneously several variables of a heavy-current power
system: current, voltage, active, reactive and apparent pow-
er, active and reactive energy, power factor, frequency, etc.
■SYMBOLS USED ON THE PRODUCT AND IN THIS MANUAL
This symbol on the product indicates that the operator
must refer to an explanation in the user’s manual in order
to avoid the risk of injury or death of personnel or damage
to the instrument.
This symbol indicates double insulation.
POINTS OF CAUTION
■CAUTION
• If Equipment is not used in a manner not specified by
M-System, the protection provided by the equipment may
be impaired.
■CONFORMITY WITH EU DIRECTIVES OR UL
• This equipment is suitable for Pollution Degree 2, Meas-
urement Category III (input, transient voltage 6000V)
and Installation Category II (auxiliary power, transient
voltage 2500V).
And insulation class of this unit is as following.
Input to Auxiliary power supply: Reinforced insulation (550V)
Output to Auxiliary power supply: Reinforced insulation (300V)
Output to Input: Basic insulation (550V)
Prior to installation, check that the insulation class of
this unit satisfies the system requirements.
• The equipment must be mounted inside a panel.
• Altitude up to 2000 meters.
• Insert a noise filter for the power source connected to the
unit. Cosel Noise Filter Model NAC-06-472 or equivalent
is recommended.
• The equipment must be installed such that appropriate
clearance and creepage distances are maintained to con-
form to CE/UL requirements. Failure to observe these
requirements may invalidate the CE/UL conformance.
• The actual installation environments such as panel con-
figurations, connected devices, connected wires, may af-
fect the protection level of this unit when it is integrated
in a panel system. The user may have to review the CE
requirements in regard to the whole system and employ
additional protective measures to ensure the CE conform-
ity.
• For safety, be sure to install a circuit breaker switch as
part of the building installation that conforms to IEC
60947-2 near the 53U so as to be operated easily, and
clearly indicate that the device is used to de-energize the
53U. The circuit breaker must be provided on both side of
the line or must be “common trip” type.
■AUXILIARY POWER SUPPLY RATING & OPERATIONAL
RANGE
• Locate the auxiliary power supply rating marked on the
product and confirm its operational range as indicated
below:
100 – 240V AC rating: 85 – 264V AC, 47 – 66 Hz, < 8 VA
110 – 240V DC rating: 99 – 264V DC, < 4 W (UL ap-
proval is not available)
• For UL approved model, power input terminals are
marked with L and N instead of U(+) and V(–).
■GENERAL PRECAUTION
• Before you remove or mount the unit, turn off the power
supply and input signal for safety.

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 2 / 8
■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 90% RH in
order to ensure adequate life span and operation.
• Contrast of the LCD screen depends upon viewing angles.
Choose the height and angle where it is the most legible.
• Do not apply physical impact to the front face.
• To ensure the designated ingress protection, insert the
gasket as shown below before attaching the mounting
brackets.
Mounting Bracket
Panel
Gasket
■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.
PERFORMANCE
Accuracy (at 23°C ±10°C or 73.4°F ±18°F, 45 – 65 Hz)
Voltage: ±0.3% (±0.2% for Option /H)*
Current: ±0.3% (±0.2% for Option /H)*
Power: ±0.5%*
Power factor: ±0.5%
Frequency: ±0.1%*
Energy: ±1% (±0.5% for Option /H)
Harmonic contents: ±1%*
Analog output: Accuracy of assigned measurand or
±0.2%, whichever is greater.
Response time: ≤ 2 seconds (0 – 99%)
≤ 3 seconds for frequency and harmonic contents
*In percentage of the spans: 480V for voltage, 1A or 5A for
current, 4155W (5A) or 831W (1A) for active power. The de-
scribed accuracy levels are ensured at the input 1% or more
for phase 2 current with 3-phase/3-wire unbalanced load, for
neutral current with 3-phase/4-wire unbalanced load, and
neutral current with 1-phase/3-wire.
■INPUT
Frequency: 50 – 60 Hz
Voltage Input
Rated voltage:
Line-to-line (delta voltage): 480V
Line-neutral (phase voltage): 277V
(for single phase/2-wire and single phase/3-wire)
Consumption VA: ≤ ULN2/ 300 kΩ / phase
Current Input
Rated current: 1A or 5A
Consumption VA: ≤ I2· 0.01 Ω / phase
Contact Input: 24V DC or 110V DC (input resistance 6 kΩ)
Auxiliary power supply:
100 – 240V AC, 8VA max., 50 – 60 Hz
110 – 240V DC, 4W max. (UL approval is not available)
■OUTPUT
Modbus
Interface: Conforms to TIA/EIA-485-A
Protocol: Modbus RTU
DC Current Output: 4 – 20mA DC, load resistance: 270 Ω
maximum
DC Voltage Output: 1 – 5V DC, load resistance: 5000 Ω
minimum
Open Collector
Programmable for either alarm or energy count.
Max. rated load: 130V DC @50mA
Continuous rated load: 130V DC @30mA
■Measurement category: CAT.III
■Auxiliary power supply installation category: CAT.II
The denition of the measurement category
CAT.I: Circuits not directly connected to the main pow-
er supply
CAT.II: Circuits directly connected to low-voltage facility
CAT.III: Circuits in building facility
CAT.IV: Power sources for low-voltage facility

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 3 / 8
COMPONENT IDENTIFICATION
■FRONT VIEW ■REAR VIEW
Data Displays
Control Buttons
Current Input
Te rminals
Configurator
Jack
Auxiliary Power
Supply Te rminals
Ext. Interface
Te rminals
Voltage Input
Te rminals
∑ IU PQS MAXEPRGPF THD
ENTER ESCAPE
■ CONTROL BUTTON OPERATIONS
∑
IU
PQS
MAX
E PRG
PF THD
ENTER
ESCAPE
E PRG ESCAPE
E PRG ESCAPE
∑
∑
IU
+
+
PQS
PF THD
Hold down
IU Hold down
Hold down
Hold down
Hold down
Hold down
NORMAL MODE
Indicates
∑ values
Indicates Voltage or Current
Indicates Power
Indicates Power Factor or THD
Indicates totalized values
(max., min., average/demand)
Switches Energy readings
Switches to My Default mode
Switches to PC Configuration mode
Switches to Setting mode
Indicates Harmonics by degrees
Switches Energy reading units
Indicates the shortcut menu
SETTING MODE
Go Left
Go Right
Go Down
Go Up
Selects menu; Enables setting changes
Cancels setting changes
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BUTTON OPERATION FUNCTIONS

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 4 / 8
EXTERNAL DIMENSIONS unit: mm (inch)
96 (3.78) 92 (3.62)
92 (3.62)
80 (3.15) [12 (.47)]23 (.91)
2 (.08)
96 (3.78)3 (.12) 3 (.12)
MOUNTING BRACKETGASKET
100 (3.94) dia.
92
+
0.8 (3.65)
0 (3.63)
92
+ 0.8 (3.65)
0 (3.63)
■ PANEL CUTOUT unit: mm (inch)
Panel thickness : 2 to 15 mm (0.08 to 0.59 inch)
■WIRING
• Current input
Applicable cable size: ≤ 2.4 mm dia., 0.5 to 3.5 mm2
Stripped length: 13 to 15 mm
• Voltage input
Applicable cable size: ≤ 2.5 mm dia., 0.5 to 3.5 mm2
Stripped length: 7 to 8 mm
• Contact input, contact output, analog output, Modbus,
auxiliary power
Applicable cable size: ≤ 2.4 mm dia., 0.5 to 2.5 mm2
Stripped length: 7 to 8 mm
■CONNECTING TO POWER SOURCE
• Confirm the auxiliary power supply rating on the speci-
fications.
Rated voltage
AC Power 100 – 240 V AC
DC Power*1110 – 240 V DC
• How to Connect the power supply cable:
1) Confirm that the power supply is turned off.
2) Pull and remove the terminal block marked U(+) and
V(–)*2from the 53U.
3) Loosen two (2) screws corresponding to U(+) and V(–)*2at
the terminal block.
4) Insert wires into the connection.
5) Fix them with the screw.
6) Replace the terminal block back into the 53U.
*1. UL approval is not available
*2. For UL approved model, L and N are marked.

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 5 / 8
TERMINAL CONNECTIONS
For UL approved model, L and N are marked instead of U(+) and V (–).
DO/PO
+–
DI
+–T1 T2 T3 T4
V1 V2 V3 N
1S 1L 2S 2L 3S 3L
U
(+) V (–)
CONFIG
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
uv vu
UV VU
kl
KL
kl
KL
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
kl
KL
kl
KL
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
V1 V2 V3 1S 1L
L1
source load
L2
L3
uv vu
UV VU
kl
KL
V1 V2 V3 1S 1L
L1
source load
L2
L3
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
uv vu
UV VU
kl
KL
kl
KL
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
kl
KL
kl
KL
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
kl
KL
V1 V2 V3 1S 1L
L1
source load
L2
L3
V1 N 1S 1L
L1
source load
N
kl
KL
uv
UV
V1 N 1S 1L
L1
source load
N
kl
KL
V1 N 1S 1L
L1
source load
N
System /
Application
Single phase /
2-wire
Three phase /
3-wire,
balanced load
Single phase /
3-wire
Terminal
1S 1L 3S 3L
L1
source load
L2
L3
kl
V1
uv
UV
V2
uv
UV
V3
uv
UV
N
KL kl
KL
V1 V2 V3 1S 1L 3S 3LN
L1
source load
L2
L3
kl
KL kl
KL
2S 2L
kl
KL
V1 V2 V3 1S 1L 3S 3LN 2S 2L
L1
source load
L2
L3
N
N
N
2S 2L
kl
KL
V1 N 1S 1L
L1
source load
L2
kl
KL
uv
UV
V1 N 1S 1L
L1
source load
L2
L3
N
kl
KL
V1 N 1S 1L
L1
source load
L2
L3
L3
N
N
System /
Application
Three phase /
4-wire,
balanced load
Three phase /
3-wire,
unbalanced load
Three phase /
4-wire,
unbalanced load
Terminal
Configurator Jack
External Interface
Input
Auxiliary Power
Supply
Note: For low voltage circuit, grounding is not required.

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 6 / 8
T3
T4
T2
T1
Term.
Resist.
+
–
Shielded Twisted-pair Cable
Jumper *1
V(–)
JACK
U(+)
DO/PO–
DO/PO+
DO/PO–
DO/PO+
DI –
DI +
CONTACT
INPUT
CONTACT
OUTPUT
• Contact Input Connection E.g.
+
-
• Contact Output Connection E.g.
+
-
DI +
DI –
To other
Modbus devices
■EXTERNAL INTERFACE CODE: 1
T3
T4
T2
T1 +
–
Shielded Twisted-pair Cable
Jumper *1
V(–)
JACK
U(+)
DO/PO COM
DO/PO3+
DO/PO2+
DO/PO1+
*1. When the device is located at the end of a transmission line via
twisted-pair cable, (when there is no cross-wiring), close across the
terminal T2 –T3 with a leadwire.
When the device is not at the end, no shortcircuit wire is required.
*2. Analog output may momentarily fluctuate while the configurator cable
is left connected.
*3. For UL approved model, L and N are marked, instead of U(+) and V(–).
To other
Modbus devices
■EXTERNAL INTERFACE CODE: 8
V(–)
U(+)
DO/PO–
DO/PO+
DI –
DI +
CONTACT
INPUT
CONTACT
OUTPUT
AO2 –
AO2 +
AO1 –
AO1 +
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
■EXTERNAL INTERFACE CODE: 4, 5
V(–)
U(+)
DO/PO1–
DO/PO1+
CONTACT
OUTPUT 1
DO/PO2–
DO/PO2+
CONTACT
OUTPUT 2
AO2 –
AO2 +
AO1 –
AO1 +
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
■EXTERNAL INTERFACE CODE: 6, 7
V(–)
U(+)
CONTACT OUTPUT 3
CONTACT OUTPUT 2
CONTACT OUTPUT 1
DO/PO3–
DO/PO3+
CONTACT
OUTPUT 3
DO/PO4–
DO/PO4+
CONTACT
OUTPUT 4
DO/PO1–
DO/PO1+
CONTACT
OUTPUT 1
DO/PO2–
DO/PO2+
CONTACT
OUTPUT 2
■EXTERNAL INTERFACE CODE: 9
V(–)
U(+)
AO4 –
AO4 +
AO3 –
AO3 +
ANALOG
OUTPUT 3
ANALOG
OUTPUT 4
AO2 –
AO2 +
AO1 –
AO1 +
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
■EXTERNAL INTERFACE CODE: 2, 3
CONFIGURATOR
CONFIGURATOR *2
JACK CONFIGURATOR *2
JACK CONFIGURATOR
JACK CONFIGURATOR *2
CONFIGURATOR
JACK
*3
*3
*3
*3
*3
*3
AUXILIARY POWER
AUXILIARY POWER
AUXILIARY POWER
AUXILIARY POWER
AUXILIARY POWER
AUXILIARY POWER
Term.
Resist.

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 7 / 8
COMMUNICATION CABLE CONNECTION
R2K-1
T1
T2
T3
T4
53U
T1
T2
T3
T4
T1
T2
T3
T4
53U
CONNECTOR
RS-232-C
RS-485
*1*1
*1. Internal terminating resistor is used when the device is at the end of a transmission line.
*2. Install shield cables to all sections and ground them at single point.
*2
FG
RS-485
SYSTEM CONFIGURATION EXAMPLES
RS-485 (Modbus RTU)
Multi Power Monitor
(model: 53U)
RS-232-C
RS-232-C/RS-485
Converter
(model: R2K-1 or LK1)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
AX
IN
AX
IN
AX
IN
■RS-485 / RS-232-C
■RS-485 / ETHERNET
Ethernet
Communication Adaptor
(model: 72EM-M4 or 72EM2-M4)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
RS-485 (Modbus RTU)
Multi Power Monitor
(model: 53U)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
AX
IN
AX
IN
AX
IN
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
*1. Insert lightning surge protectors recommended in this example if necessary.
ETHERNET
RUN
SEND
FIELD
CNFG
RS-485

53U
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6485-A Rev.15 P. 8 / 8
RS-485 (Modbus RTU)
Multi Power Monitor
(model: 53U)
RS-232-C
RS-232-C/RS-485
Converter
(model: R2K-1 or LK1)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
AX
IN
AX
IN
AX
IN
■RS-485 / RS-232-C
■RS-485 / ETHERNET
Ethernet
Communication Adaptor
(model: 72EM-M4 or 72EM2-M4)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
RS-485 (Modbus RTU)
Multi Power Monitor
(model: 53U)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
AX
IN
AX
IN
AX
IN
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
*1. Insert lightning surge protectors recommended in this example if necessary.
ETHERNET
RUN
SEND
FIELD
CNFG
RS-485
MAINTENANCE
■CLEANING
The front panel and operation keys should be gently wiped
with a dry cloth.
Caution: Do not use alcohol, benzine, or any other solvents.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.