MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 1/9
Power Transducer Series
mm (inch)
60 (2.36)
105
(4.13)
120
(4.72)
MULTI POWER TRANSDUCER
Functions & Features
• Measures simultaneously several variables of a heavycurrent power system: current, voltage, active, reactive,
and apparent power, active and reactive energy, power
factor, frequency, etc.
• All measured values, counter values, setting data are
stored in the non-volatile memory at the power off.
• Conversion factors, system configuration, interval times
are programmable.
• Open collector output for alarm or energy count.
Typical Applications
• Multi-functional power measurement in electric device or
in switching boards.
(‘External Interface’ codes 2, 3, 6 and 7 Not selectable.)
2: 110 V DC
(‘External Interface’ codes 2, 3, 6 and 7 Not selectable.)
[3] EXTERNAL INTERFACE
1: Modbus, Do × 1, Di × 1
2: 4 – 20 mA DC × 4
3: 1 – 5 V DC × 4
4: 4 – 20 mA DC × 2, Do × 1, Di × 1
5: 1 – 5 V DC × 2, Do × 1, Di × 1
6: 4 – 20 mA DC × 2, Do × 2
7: 1 – 5 V DC × 2, Do × 2
AUXILIARY POWER SUPPLY
AD4: universal
100 – 240 V AC (Operational range 85 – 264 V, 50 / 60 Hz) /
110 – 240 V DC (Operational range 99 – 264 V,
ripple 10 %p-p max)
[4] OPTIONS (multiple selections)
Performance
blank: Standard
/H: High accuracy (voltage/current: ±0.2 %, energy: ±0.5 %)
Other Options
blank: none
/Q: Option other than the above (specify the specification)
MODEL: L53U-1[1][2][3]-AD4[4]
ORDERING INFORMATION
• Code number: L53U-1[1][2][3]-AD4[4]
Specify a code from below for each [1] through [4].
(e.g. L53U-1211-AD4/H/Q)
• Specify the specification for option code /Q
(e.g. /SET)
CONFIGURATION
1: Single-phase / 2-wire and 3-wire,
3-phase / 3-wire and 4-wire
[1] INPUT
1: 480 V / 1 A AC
2: 480 V / 5 A AC
[2] DISCRETE INPUT
0: None
( ‘External Interface’ codes 1, 4 and 5 Not selectable.)
1: 24 V DC
SPECIFICATIONS OF OPTION: Q
EX-FACTORY SETTING
/SET: Preset according to the Ordering Information Sheet
(No. ESU-1958)
RELATED PRODUCTS
• PC configurator software (model: PMCFG)
• PC Recorder Light software for the 53U (model:
MSR128LUx)
Downloadable at M-System’s web site.
A dedicated cable is required to connect the module to the
PC. Please refer to the internet software download site or
the users manual for the PC configurator for applicable
cable types.
GENERAL SPECIFICATIONS
Connection
Voltage input: Connector type terminal block
(applicable wire size ≤ 2.5 dia, 0.5 – 3.5 mm2)
Current input: Screw terminal block
(applicable wire size ≤ 2.4 dia, 0.5 – 3.5 mm2)
Output, power: Connector type terminal block
(applicable wire size ≤ 2.4 dia, 0.5 – 2.5 mm2)
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 2/9
Configuration: Single phase/2-wire and 3-wire, 3-phase/3wire balanced/unbalanced load, 3-phase/4-wire
balanced/unbalanced load
Housing material: Flame-resistant resin (gray)
Mode selector: Select operation or configuration mode
Isolation: Voltage input to current input to discrete input to
discrete output to network interface or configurator jack or
analog output to power
• Measured variables
Voltage: 1 – N, 2 – N, 3 – N, 1 – 2, 2 – 3, 3 – 1
Current: 1, 2, 3, N
Active / reactive / apparent power: 1, 2, 3, Σ
Power factor: 1, 2, 3, Σ
Frequency
Voltage phase angle: 1 – 2, 2 – 3, 3 – 1
Active energy: Incoming / outgoing / high tariff (peak) / low
tariff (off-peak)
Reactive energy: Incoming / outgoing / lag / lead / high tariff
(peak) / low tariff (off-peak)
Apparent energy
Active / reactive / apparent average power (demand)
Average current: 1, 2, 3,N
Harmonic contents: Σ, 2nd to 31st
Count time: High tariff / low tariff
Max. and min. values
Demand history: 1 to 4
INPUT SPECIFICATIONS
Frequency: 50 / 60 Hz (45 – 65 Hz)
• Voltage Input
Rated voltage
Line-to-line (delta voltage): 480 V
Line-neutral (phase voltage): 277 V (single-phase / 2-wire
and 3-wire)
Consumption VA: ≤ ULN2 / 300 kΩ / phase
Overload capacity: 200 % of rating for 10 sec., 120 %
continuous
Selectable primary voltage range: 50 – 400 000 V
• Current Input
Rated current: 1 A or 5 A
Consumption VA: ≤ I2 · 0.01 Ω / phase
Overload capacity: 4000 % of rating for 1 sec., 2000 % for
4 sec., 120 % continuous
Selectable primary current range: 1 – 20 000 A
Selectable primary power range: ≤ 2 G VA
Operational range
Voltage, current, apparent power: ≤ 120 % of the rating
Active / reactive power: -120 to +120 % of the rating
Frequency: 45 – 65 Hz
Power factor: -1 to +1
■ Contact Input: 24 V DC or 110 V DC
(input resistance 6 kΩ)
Detecting voltage: External 24 V DC ±10 % or 110 V DC
±10 %
ON current: ≥ 1 mA (≤ 24 kΩ @ 24 V, ≤ 110 kΩ @110 V)
OFF current: ≤ 0.1 mA (≥ 240 kΩ @ 24 V, ≥ 1.1 MΩ @ 110
V)
Detecting time: 10 – 1000 msec.
The status can be monitored on the Modbus; usable to reset
energy count or to update average (demand) value.
OUTPUT SPECIFICATIONS
■ Network Interface
Communication: Half-duplex, asynchronous, no procedure
Interface: Conforms to EIA RS-485
Max. transmission distance: 500 meters
Baud rate: 1.2 – 38.4 kbps
Max. number of nodes: 31 (except the master)
Protocol: Modbus RTU
Node address: 1 – 247 (factory default setting: 1)
Parity: none, even or odd (factory default setting: odd)
Stop bit: 1 or 2 (factory default setting: 1)
Media: Shielded twisted-pair cable (CPEV-S 0.9 dia.)
■ DC Current: 4 – 20 mA DC
Load resistance: ≤ 270 Ω
Measurands converted into analog output: Voltage, Current,
Active / reactive / apparent power, Power factor, Frequency,
Harmonic contents
■ DC Voltage: 1 – 5 V DC
Load resistance: ≥ 5000 Ω
Measurands converted into analog output: Voltage, Current,
Active / reactive / apparent power, Power factor, Frequency,
Harmonic contents
■ Open Collector
Programmable for either alarm or energy count.
Max. rated load: 130 V DC @50 mA
Continuous rated load: 130 V DC @30 mA
Saturation voltage: 1.5 V DC
Measurands applicable to alarm: Voltage, current, average
current (demand), neutral current, frequency, power,
average power (demand)
(ON delay, deadband and other parameters are selectable)
Measurands applicable to count: Energy;
Pulse rate selectable within
0.1 – 10 000.0 kWh/p, kvarh/p, kVAh/p
INSTALLATION
Power input
•AC: < 8 VA
•DC: Operational voltage range 99 – 264 V,
ripple 10 %p-p max.; < 3 W
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 3/9
Mounting: DIN rail
Weight: 320 g (0.71 lb)
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.
* 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 %
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.
Response time: ≤ 2 sec. (0 – 99 %),
≤ 3 sec. for frequency and harmonic contents
Sampling time:
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 discrete input or discrete
output or network interface or configurator jack or analog
output to power)
2500 V AC @1 minute
(voltage input to current input to discrete input to discrete
output to network interface or configurator jack or analog
output)
IEC 62053-22: 2003 class 0.5s
IEC 62053-23: 2003 class 2
(IEC standards are applicable with Option /H only)
STANDARDS & APPROVALS
CE conformity:
EMC Directive (2004/108/EC)
EMI EN 61000-6-4: 2007
EMS EN 61000-6-2: 2005
Low Voltage Directive (2006/95/EC)
EN 61010-1: 2001
Measurement Category III (input)
Measurement Category II (output)
Installation Category II (power)
Pollution Degree 2
Input to power: Reinforced insulation (550 V)
Output to power: Reinforced insulation (300 V)
Input to output: Basic insulation (550 V)
IEC standard:
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 4/9
EXTERNAL VIEW
on
Configurator Jack
Power Input Te rminals
Ext. Interface Te rminals
Voltage Input Te rminals
Current Input Te rminals
Mode Selector
MULTI POWER TRANSDUCER MULTI POWER TRANSDUCER
AO2
AO1
AO4
AO3
MULTI POWER TRANSDUCER MULTI POWER TRANSDUCER
■ EXTERNAL INTERFACE CODE: 1 ■ EXTERNAL INTERFACE CODE: 2, 3
■ EXTERNAL INTERFACE CODE: 4, 5 ■ EXTERNAL INTERFACE CODE: 6, 7
DI
DO
PO
AO2
AO1
DO1
PO1
DO2
PO2
AO1
AO2
TERMINAL CONNECTIONS
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 5/9
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
u v v u
U V V U
k l
K L
k l
K L
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
k l
K L
k l
K L
V1 N V2 1S 1L 2S 2L
L1
source load
N
L2
V1 V2 V3 1S 1L
L1
source load
L2
L3
u v v u
U V V U
k l
K L
V1 V2 V3 1S 1L
L1
source load
L2
L3
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
u v v u
U V V U
k l
K L
k l
K L
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
k l
K L
k l
K L
V1 V2 V3 1S 1L 3S 3L
L1
source load
L2
L3
k l
K L
V1 V2 V3 1S 1L
L1
source load
L2
L3
V1 N 1S 1L
L1
source load
N
k l
K L
u v
U V
V1 N 1S 1L
L1
source load
N
k l
K L
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
k l
V1
u v
U V
V2
u v
U V
V3
u v
U V
N
K L
k l
K L
V1 V2 V3 1S 1L 3S 3LN
L1
source load
L2
L3
k l
K L
k l
K L
2S 2L
k l
K L
V1 V2 V3 1S 1L 3S 3LN 2S 2L
L1
source load
L2
L3
N
N
N
2S 2L
k l
K L
V1 N 1S 1L
L1
source load
L2
k l
K L
u v
U V
V1 N 1S 1L
L1
source load
L2
L3
N
k l
K L
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
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 6/9
T3
T4
T2
T1
Term.
Resist.
+
–
Shielded Twisted-pair Cable
Jumper *
1
V(–)
JACK
U(+)
POWER
DO/PO–
DO/PO+
DO/PO–
DO/PO+
DI –
DI +
DISCRETE
INPUT
DISCRETE
OUTPUT
• Discrete Input Connection E.g.
+
-
• Discrete Output Connection E.g.
+
-
DI +
DI –
To other
Modbus devices
■ EXTERNAL INTERFACE CODE: 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.
Analog output may momentarily fluctuate while the configurator cable
is left connected.
*1.
*2.
V(–)
U(+)
POWER
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
■ EXTERNAL INTERFACE CODE: 4, 5 ■ EXTERNAL INTERFACE CODE: 6, 7
DISCRETE
INPUT
DISCRETE
OUTPUT
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
POWER
CONFIGURATOR *
2
DO/PO–
DO/PO+
DI –
DI +
AO2 –
AO2 +
AO1 –
AO1 +
V(–)
U(+)
JACK
DISCRETE
INPUT
DISCRETE
OUTPUT
ANALOG
OUTPUT 1
ANALOG
OUTPUT 2
POWER
CONFIGURATOR *
2
DO/PO–
DO/PO+
AO2 –
AO2 +
AO1 –
AO1 +
V(–)
U(+)
JACK
DO/PO–
DO/PO+
L53UL53U
T1
T2
T3
T4
T1
T2
T3
T4
R2K-1
RS-232-C
※1
RS-485 RS-485
T1
T2
T3
T4
*
1
*
2
FG
CONNECTOR
*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.
MODBUS WIRING CONNECTION
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 7/9
DIMENSIONS unit: mm (inch)
60 (2.36)
105 (4.13)5 (.20)
12 (.47) 108 (4.25) [3 (.12)]
DIN RAIL
35mm wide
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 8/9
SYSTEM CONFIGURATION EXAMPLES
RS-485 (Modbus RTU)
Multi Power Transducer
(model: L53U)
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 / RS-232C
■ RS-485 / ETHERNET
Ethernet
Communication Adaptor
(model: 72EM2-M4)
ETHERNET
RUN
SEND
FIELD
CNFG
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
RS-485 (Modbus RTU)
Multi Power Transducer
(model: L53U)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *
1
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R) *1
*1. Insert lightning surge protectors recommended in this example if necessary.
MODEL: L53U
http://www.m-system.co.jp/ L53U SPECIFICATIONS ES-1958 Rev.4 Page 9/9
Specifications are subject to change without notice.
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