·Some details are not shown. Please refer to specification sheets for all information.

L53U

Power Transducer Series

MULTI POWER TRANSDUCER

Functions & Features
• Measures simultaneously several variables of a heavy-current 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.
 

MODEL: L53U-1[1][2][3]-[4][5]

ORDERING INFORMATION
• Code number: L53U-1[1][2][3]-[4][5]
Specify a code from below for each [1] through [5].
  (e.g. L53U-1211-AD4/H/A/Q)
• Specify the specification for option code /Q
  (e.g. /C01/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
(‘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

[4] AUXILIARY POWER SUPPLY
AD4: universal
100 – 240 V AC (Operational range 85 – 264 V, 47 – 66 Hz) /
110 – 240 V DC  (Operational range 99 – 264 V,
  ripple 10 %p-p max)
R: DC Power
24 V DC (Operational range 19 – 29 V, ripple 10 %p-p max)
(‘External interface’ codes 1, 4, 5, 6 and 7 Not selectable.)

[5] OPTIONS (multiple selections)
Performance
blank: Standard
/H: High accuracy (voltage/current: ±0.2 %, energy: ±0.5 %)
Configurator Software Switch
/A: Without switch (must specify)
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
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, stripped length 7 - 8 mm)
Current input: Screw terminal block
(applicable wire size: ≤ 2.4 dia, 0.5 – 3.5 mm2, stripped length 13 - 15 mm)
Discrete input, discrete output, analog output, Modbus, auxiliary power supply: Connector type terminal block
(applicable wire size: ≤ 2.4 dia, 0.5 – 2.5 mm2, stripped length 7 - 8 mm)
Configuration: Single phase/2-wire and 3-wire, 3-phase/3-wire balanced/unbalanced load, 3-phase/4-wire balanced/unbalanced load
Housing material: Flame-resistant resin (gray)
Isolation: Voltage input to current input to discrete input to discrete output to Modbus or configurator jack or analog output to auxiliary 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
■ Discrete 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
Modbus
Communication: Half-duplex, asynchronous, no procedure
Interface: Conforms to TIA/EIA-485-A
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 consumption
AC: < 10 VA
DC: < 3 W
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
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)*1
Current: ±0.3 % (±0.2 % for Option /H)*1
Power: ±0.5 %*1
Power factor: ±0.5 %
Frequency: ±0.1 %*1
Energy: ±1 % (±0.5 % for Option /H*2)
Harmonic contents: ±1 %*1
Analog output: Accuracy of assigned measurand or ±0.2 %, whichever is greater.
*1. Percentage of the spans:
            480 V for voltage;
            1 A or 5 A for current; and
            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.
*2. Accuracy level: 
    Active energy class 0.5S according to IEC 62053-22
    (Reactive energy class 2 according to IEC 62053-23)
Sampling rate: 64 samples per cycle
Data update period:
  Harmonic contents and frequency: ≤ 1.1 sec.
  Other: ≤ 600 msec.
Response time: ≤ 2 sec. (0 – 99 %),
≤ 3 sec. for frequency and harmonic contents
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 Modbus or configurator jack or analog output to auxiliary power)
2500 V AC @1 minute
(voltage input to current input to discrete input to discrete output to Modbus or configurator jack or analog output)

STANDARDS & APPROVALS
EU conformity:
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
Low Voltage Directive 
  EN 61010-1
  Measurement Category III (input) (Measurement Category
  II if the auxiliary power supply code is R)
  Measurement Category II  (output)
  Installation Category II (auxiliary power)
  Pollution Degree 2
 Input to auxiliary power: Reinforced insulation (550 V)
 Output to auxiliary power: Reinforced insulation (300 V)
 Input to output: Basic insulation (550 V)
RoHS Directive
  EN 50581

EXTERNAL VIEW

TERMINAL CONNECTIONS

MODBUS WIRING CONNECTION

EXTERNAL DIMENSIONS unit: mm (inch)

SYSTEM CONFIGURATION EXAMPLES

M-System Co., Ltd.