MODEL: 53U

Power Transducer Series [2] CONTACT INPUT

0: None
( ‘External Interface’ codes 1, 4 and 5 Not selectable.)
MULTI POWER MONITOR
1: 24 V DC
(4 digital displays)
(‘External Interface’ codes 2, 3, 6, 7, 8 and 9 Not selectable.)
Functions & Features
2: 110 V DC
• Measures simultaneously several variables of a heavy-
(‘External Interface’ codes 2, 3, 6, 7, 8 and 9 Not selectable.)
current power system: current, voltage, active, reactive and
apparent power, active and reactive energy, power factor,
frequency, etc. [3] EXTERNAL INTERFACE
• All measured values, counter values, display mode, 1: Modbus, Do × 1, Di × 1
setting data are stored in the non-volatile memory at the 2: 4 – 20 mA DC × 4
power off 3: 1 – 5 V DC × 4
• Conversion factors, system configuration, interval times 4: 4 – 20 mA DC × 2, Do × 1, Di × 1
are programmable using the front keys 5: 1 – 5 V DC × 2, Do × 1, Di × 1
• Open collector output for alarm or energy count 6: 4 – 20 mA DC × 2, Do × 2
7: 1 – 5 V DC × 2, Do × 2
Typical Applications 8: Modbus, Do × 3
• Multi-functional power monitor incorporated in an electric 9: Do × 4
device: saves space, wiring works, and cost

[4] AUXILIARY POWER SUPPLY

96 (3.78)
AD4: universal (Option /UL not selectable.)
100 – 240 V AC (Operational range 85 – 264 V, 47 – 66 Hz) /
110 – 240 V DC (Operational range 99 – 264 V,
AX

ripple 10 %p-p max)

IN

96
(3.78) M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,
47 – 66 Hz)
115
(4.53)
mm (inch) [5] OPTIONS (multiple selections)
Performance
blank: Standard
MODEL: 53U-1[1][2][3]-[4][5] /H: High accuracy (voltage/current: ±0.2 %, energy: ±0.5 %)
Standards & Approvals
ORDERING INFORMATION blank: CE marking
• Code number: 53U-1[1][2][3]-[4][5] /UL: UL approval, CE marking
Specify a code from below for each [1] through [5]. Other Options
(e.g. 53U-1211-M2/H/Q) blank: none
• Specify the specification for option code /Q /Q: Option other than the above (specify the specification)
(e.g. /SET) (UL not available)

CONFIGURATION SPECIFICATIONS OF OPTION: Q

1: Single-phase / 2-wire and 3-wire, EX-FACTORY SETTING
3-phase / 3-wire and 4-wire /SET: Preset according to the Ordering Information Sheet
(No. ESU-6485)

[1] INPUT
1: 480 V / 1 A AC RELATED PRODUCTS
2: 480 V / 5 A AC • PC configurator software (model: PMCFG)
• PC Recorder Light software for the 53U (model:
MSR128LUx) Software downloadable at M-System’s web.
Software downloadable at M-System’s web site.
A dedicated cable is required to connect the module to the

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 MODEL: 53U
PC. Please refer to the internet software download site or Line-to-line (delta voltage): 480 V
the users manual for the PC configurator for applicable Line-neutral (phase voltage): 277 V (single-phase / 2-wire
cable types. and 3-wire)
Consumption VA: ≤ ULN2 / 300 kΩ / phase
Overload capacity: 200 % of rating for 10 sec., 120%
GENERAL SPECIFICATIONS
continuous
Construction: 96-mm square (1/4 DIN size) panel flush
Selectable primary voltage range: 50 – 400 000 V
mounted
• Current Input
Degree of protection
Rated current: 1 A or 5 A
Front panel: IP 50
Consumption VA: ≤ I2 · 0.01 Ω / phase
Terminal block, housing: IP 30
Overload capacity: 4000 % of rating for 1 sec., 2000% for 4
Connection
sec., 120% continuous
Voltage input: Connector type terminal block
Selectable primary current range: 1 – 20 000 A
(applicable wire size ≤ 2.5 dia, 0.5 – 3.5 mm2)
Operational range
Current input: Screw terminal block
Voltage, current, apparent power: ≤ 120 % of the rating
(applicable wire size ≤ 2.4 dia, 0.5 – 3.5 mm2)
Active/reactive power: ≤ ±120 % of the rating
Output, power: Connector type terminal block
Frequency: 45 – 65 Hz
(applicable wire size ≤ 2.4 dia, 0.5 – 2.5 mm2)
Power factor: ≤ ±1
Configuration: Single phase/2-wire and 3-wire, 3-phase/3-
■ Contact Input: 24 V DC or 110 V DC
wire balanced/unbalanced load, 3-phase/4-wire
(input resistance 6 kΩ)
balanced/unbalanced load
Detecting voltage: External 24 V DC ±10 % or 110 V DC
Housing material: Flame-resistant resin (gray)
±10 %
Isolation: Voltage input to current input to contact input to
ON current: ≥ 1 mA (≤ 24 kΩ @ 24 V, ≤ 110 kΩ @110 V)
network interface or configurator jack or analog output to
OFF current: ≤ 0.1 mA (≥ 240 kΩ @ 24 V, ≥ 1.1 MΩ @ 110
contact output (between each contact output except for
V)
External Interface code 8) to power
Detecting time: 10 – 1000 msec.
• Measured variables
The status can be monitored on the Modbus; usable to reset
Voltage: 1 – N, 2 – N, 3 – N, 1 – 2, 2 – 3, 3 – 1
energy count or to update average (demand) value.
Current: 1, 2, 3, N
Average current: 1, 2, 3
Active / reactive / apparent power: 1, 2, 3, Σ OUTPUT SPECIFICATIONS
Power factor: 1, 2, 3, Σ ■ Network Interface
Frequency Communication: Half-duplex, asynchronous, no procedure
Phase angle between voltages: 1 - 2, 2 - 3, 3 - 1 Interface: Conforms to EIA RS-485
Active energy incoming / outgoing: Σ Max. transmission distance: 500 meters
Reactive energy inductive / capacitive: Σ Baud rate: 1.2 – 38.4 kbps
Apparent energy: Σ Max. number of nodes: 31 (except the master)
Active / reactive / apparent power intervals (demand) Protocol: Modbus RTU
Other demands Node address: 1 – 247 (factory default setting: 1)
Harmonic contents: 2nd to 31st Parity: none, even or odd (factory default setting: odd)
Max. and min. values Stop bit: 1 or 2 (factory default setting: 1)
Media: Shielded twisted-pair cable (CPEV-S 0.9 dia.)
■ DISPLAY: LCD with LED backlight ■ DC Current: 4 – 20 mA DC
(LED OFF timer available) Load resistance: ≤ 270 Ω
Signed: 4 digits, 3 lines Measurands converted into analog output: Voltage, Current,
Energy: 9 digits, 1 line Active / reactive / apparent power, Power factor, Frequency,
Bargraph: 3 points Harmonic contents
■ DC Voltage: 1 – 5 V DC
Load resistance: ≥ 5000 Ω
INPUT SPECIFICATIONS
Measurands converted into analog output: Voltage, Current,
Frequency: 50 / 60 Hz (45 – 65 Hz)
Active / reactive / apparent power, Power factor, Frequency,
• Voltage Input
Harmonic contents
Rated voltage
■ Open Collector

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 MODEL: 53U
Programmable for either alarm or energy count. output to power)
Max. rated load: 130 V DC @50 mA 2500 V AC @1 minute
Continuous rated load: 130 V DC @30 mA (voltage input to current input to contact input to contact
Saturation voltage: 1.5 V DC output to network interface or configurator jack or analog
Measurands applicable to alarm: Voltage, current, current output)
intervals, neutral current, frequency, energy, energy 2000 V AC @1 minute
intervals (between each contact output except for External Interface
(ON delay, deadband and other parameters are selectable) code 8)
Measurands applicable to count: Energy; 2000 V AC @1 minute (circuits to housing)
Pulse rate selectable within
0.1 – 10 000.0 kWh/p, kvarh/p, kVAh/p
STANDARDS & APPROVALS
CE conformity:
EMC Directive (2004/108/EC)
EMI EN 61000-6-4: 2007
EMS EN 61000-6-2: 2005
INSTALLATION Low Voltage Directive (2006/95/EC)
Power consumption
EN 61010-1: 2001
•AC: < 8 VA
Measurement Category III (input)
•DC: < 4 W
Installation Category II (power)
Operating temperature: -10 to +55°C (14 to 131°F)
Pollution Degree 2
Storage temperature: -20 to +80°C (-4 to +176°F)
Input to power: Reinforced insulation (550 V)
Operating humidity: 90 % RH max. (non-condensing)
Output to power: Reinforced insulation (300 V)
Mounting: Panel flush mounting
Input to output: Basic insulation (550 V)
Weight: 300 g (0.66 lb)
Approval:
UL/C-UL general safety requirements
PERFORMANCE (UL 61010-1:2005, CAN/CSA-C22.2 No.61010-1:2004)
Accuracy (at 23°C ±10°C or 73.4°F ±18°F, 45 – 65 Hz) IEC standard:
Voltage: ±0.3 % (±0.2 % for Option /H)* IEC 62053-22: 2003 class 0.5s
Current: ±0.3 % (±0.2 % for Option /H)* IEC 62053-23: 2003 class 2
Power: ±0.5 %* (IEC standards are applicable with Option /H only)
Power factor: ±0.5 %
Frequency: ±0.1 %*
MOUNTING REQUIREMENTS mm (inch)
Energy: ±1 % (±0.5 % for Option /H)
■ PANEL CUTOUT unit: mm (inch)
Harmonic contents: ±1 %* +0.8 (3.65)
92 0 (3.63)
Analog output: Accuracy of assigned measurand or ±0.2 %,
whichever is greater.
* In percentage of the spans: 480 V for voltage, 1 A or 5 A
for current, 4155 W (5 A) or 831 W (1 A) for active power.
The described accuracy levels are ensured at the input 1 %
+0.8 (3.65)
0 (3.63)

or more for phase 2 current with 3-phase/3-wire unbalanced

load, for neutral current with 3-phase/4-wire unbalanced
92

load, and neutral current with 1-phase/3-wire.

Response time: ≤ 2 sec. (0 – 99 %),
≤ 3 sec. for frequency and harmonic contents
Sampling time: Panel thickness : 2 to 15 mm (0.08 to 0.59 inch)
Harmonic contents and frequency: ≤ 1.1 sec.
Other: ≤ 600 msec.
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength:
4000 V AC @1 minute
(voltage input or current input or contact input or contact
output or network interface or configurator jack or analog

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 MODEL: 53U
EXTERNAL VIEW
■ FRONT VIEW ■ REAR VIEW

Voltage Input
Data Displays Terminals
Current Input
Terminals

Power Input
Terminals Configurator
Jack
Control Buttons ∑ IU PQS PF THD MAX E PRG
Ext. Interface
ENTER ESCAPE Terminals

TERMINAL CONNECTIONS
For UL approved model, L and N are marked, instead of U(+) and V(-).
Input

V1 V2 V3 N 1S 1L 2S 2L 3S 3L System /
Application
Terminal

V1 V2 V3 1S 1L 3S 3L V1 V2 V3 1S 1L 3S 3L

source load source k l load

L1 L1
K L k l
L2 L2
CONFIG Three phase /
U V + – + – T1 T2T3 T4 L3 L3
K L
(+) (–) 3-wire,
unbalanced load
Configurator Jack V1 V2 V3 1S 1L 3S 3L
DO/PO DI

u v v u

source k l load
U V V U
Power Input External Interface L1
K L k l
L2
System / L3
Application
Terminal K L

V1 N 1S 1L V1 N 1S 1L V1 N 1S 1L V1 N 1S 1L

source load source k l load source load source k l load

L1 L1 L1 L1
K L K L
N N L2 L2
Single phase / Three phase / L3 L3
2-wire 4-wire, N N

V1 N 1S 1L balanced load V1 N 1S 1L

u v u v

source U V k l load k l
source U V load
L1 L1
K L K L
N L2
L3
N

V1 V2 V3 1S 1L V1 V2 V3 1S 1L

V1 V2 V3 N 1S 1L 2S 2L 3S 3L
source load source k l load
L1 L1
K L
L2 L2
Three phase / L3 L3 source load
3-wire, L1
L2
balanced load V1 V2 V3 1S 1L L3
N
u v v u

source k l load
U V V U
L1 V1 V2 V3 N 1S 1L 2S 2L 3S 3L
K L
L2
L3
Three phase /
4-wire, source k l load
k l
V1 N V2 1S 1L 2S 2L V1 N V2 1S 1L 2S 2L unbalanced load L1
K L k l
L2
K L
L3
K L
N
source load source k l load
L1 L1
K L k l
N N
L2 L2 V1 V2 V3 N 1S 1L 2S 2L 3S 3L
Single phase / K L

3-wire u v u v u v
V1 N V2 1S 1L 2S 2L
source k l load
U V U V U V k l
L1
u v v u K L k l
L2
K L
source k l load L3
U V V U K L
L1 N
K L k l
N
L2
K L

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 MODEL: 53U
■ EXTERNAL INTERFACE CODE: 1 ■ EXTERNAL INTERFACE CODE: 2, 3

DI + AO1 +
CONTACT ANALOG
INPUT OUTPUT 1
DI – AO1 –

DO/PO+ AO2 +
CONTACT ANALOG
OUTPUT OUTPUT 2
DO/PO– AO2 –
Shielded Twisted-pair Cable
T1 + To other AO3 +
ANALOG
T2 – Modbus devices OUTPUT 3
AO3 –
T3
Term.
Jumper *1
Resist. T4 AO4 +
ANALOG
*3 OUTPUT 4
U(+) AO4 –
POWER 3
V(–) U(+) *
POWER
JACK CONFIGURATOR V(–)

JACK CONFIGURATOR *2

■ EXTERNAL INTERFACE CODE: 4, 5 ■ EXTERNAL INTERFACE CODE: 6, 7

DI + AO1 +
CONTACT ANALOG
INPUT OUTPUT 1
DI – AO1 –

DO/PO+ AO2 +
CONTACT ANALOG
OUTPUT OUTPUT 2
DO/PO– AO2 –

AO1 + DO/PO1+
ANALOG CONTACT
OUTPUT 1 OUTPUT 1
AO1 – DO/PO1–

AO2 + DO/PO2+
ANALOG CONTACT
OUTPUT 2 OUTPUT 2
AO2 – DO/PO2–
*3 3
U(+) U(+) *
POWER POWER
V(–) V(–)

JACK CONFIGURATOR *2 JACK CONFIGURATOR *2

■ EXTERNAL INTERFACE CODE: 8 ■ EXTERNAL INTERFACE CODE: 9

DO/PO1+ DO/PO1+
CONTACT OUTPUT 1 CONTACT
OUTPUT 1
DO/PO2+ DO/PO1–
CONTACT OUTPUT 2
DO/PO3+ DO/PO2+
CONTACT OUTPUT 3 CONTACT
OUTPUT 2
DO/PO COM DO/PO2–
Shielded Twisted-pair Cable
T1 + To other DO/PO3+
CONTACT
T2 – Modbus devices OUTPUT 3
DO/PO3–
T3
Term.
Jumper *1
Resist. T4 DO/PO4+
CONTACT
OUTPUT 4
U(+) *3 DO/PO4–
POWER
V(–) U(+) *3
POWER
JACK CONFIGURATOR V(–)

JACK CONFIGURATOR

• Contact Input Connection E.g. • Contact Output Connection E.g.

*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
DI + + DO/PO+ +
terminal T2 – T3 with a leadwire.
When the device is not at the end, no shortcircuit wire is required.
DI – - DO/PO– - *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(–).

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 MODEL: 53U
MODBUS WIRING CONNECTION
R2K-1 RS-485 RS-485
53U 53U

CONNECTOR
T1 T1 T1
RS-232C
T2 T2 T2
*1 *1
T3 T3 T3
T4 T4 T4

FG *
2

*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.

DIMENSIONS unit: mm (inch)

3 (.12)

96 (3.78) 23 (.91) 80 (3.15) [12 (.47)] 92 (3.62)

10
0(
3.9
4)
dia
.

92 (3.62)
96 (3.78)

2 (.08)
3 (.12)

GASKET MOUNTING BRACKET

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 MODEL: 53U
SYSTEM CONFIGURATION EXAMPLES
■ RS-485 / RS-232C

RS-232C

RS-232C/RS-485
Converter
(model: R2K-1 or LK1)

Lightning Surge Protector

for RS-485/422
(model: MD74R or MDP-4R) *1

RS-485 (Modbus RTU)

Lightning Surge Protector

for RS-485/422
(model: MD74R or MDP-4R) *1

AX AX AX
IN IN IN

Multi Power Monitor

(model: 53U)

■ RS-485 / ETHERNET

Ethernet

Communication Adaptor
ETHERNET

RUN
SEND
FIELD
(model: 72EM-M4 or 72EM2-M4)
CNFG

Lightning Surge Protector

for RS-485/422
(model: MD74R or MDP-4R) *1

RS-485 (Modbus RTU)

Lightning Surge Protector

for RS-485/422
(model: MD74R or MDP-4R) *1

AX AX AX
IN IN IN

Multi Power Monitor

(model: 53U)

*1. Insert lightning surge protectors recommended in this example if necessary.

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 MODEL: 53U

Specifications are subject to change without notice.

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