MODEL: 53U

53U SPECIFICATIONS

ES-6485 Rev.26 Page 2/9

https://www.m-system.co.jp/

RELATED PRODUCTS

• 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

PC. Please refer to the internet software download site or

the users manual for the PC configurator for applicable

cable types.

GENERAL SPECIFICATIONS

Construction: 96-mm square (1/4 DIN size) panel flush

mounted

Degree of protection

Front panel: IP 50

Terminal block, housing: IP 30

Connection

Voltage input: Connector type terminal block

length 7 - 8 mm)

Current input: Screw terminal block

length 13 - 15 mm)

Contact input, contact output, analog output, Modbus,

auxiliary power supply: Connector type terminal block

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 contact input to

Modbus or configurator jack or analog output to contact

output (between each contact output except for External

Interface code 8) to power

■ Measured variables

Voltage: 1 – N, 2 – N, 3 – N, 1 – 2, 2 – 3, 3 – 1

Current: 1, 2, 3, N

Average current: 1, 2, 3

Active / reactive / apparent power: 1, 2, 3, Σ

Power factor: 1, 2, 3, Σ

Frequency

Phase angle between voltages: 1 - 2, 2 - 3, 3 - 1

Active energy incoming / outgoing: Σ

Reactive energy inductive / capacitive: Σ

Apparent energy: Σ

Active / reactive / apparent power intervals (demand)

Other demands

Harmonic contents: 2nd to 31st

Max. and min. values

■ DISPLAY: LCD with LED backlight

(LED OFF timer available)

Signed: 4 digits, 3 lines

Energy: 9 digits, 1 line

Bargraph: 3 points

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)

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

Overload capacity: 4000 % of rating for 1 sec., 2000% for 4

sec., 120% continuous

Selectable primary current range: 1 – 20 000 A

Operational range

Voltage, current, apparent power: ≤ 120 % of the rating

Active/reactive power: ≤ ±120 % of the rating

Frequency: 45 – 65 Hz

Power factor: ≤ ±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

■ 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