Technical Data — EEM-MA390-R-24DC

 

 

Measurement data acquisition  

Measuring principle

True root-mean-square (TRMS) value measurement, gapless

Operating mode

Continuous and simultaneous across all 6 channels

Linearization method

internal

Measurement value

AC sine

Nominal frequency

50/60 Hz

Frequency range of the fundamental

45 Hz ... 65 Hz

Sampling rate

256 times the signal frequency:

12800 Hz @ FSignal = 50 Hz

15360 Hz @ FSignal = 60 Hz

Detection of harmonics

up to 63rd harmonic
Number of periods (TRMS values)

10 @ FSignal = 50 Hz

12 @ FSignal = 60 Hz

Dimensions

Housing

90 mm (width) x 80 mm (height) x 64 mm (depth)

Voltage measurement

Input type

Voltage measurement against N (neutral)

Nominal voltage Un, direct

100 AC ... 575 V AC (Ph/Ph)

57.7 V AC ... 333 V AC (Ph/N)

Input measuring range, direct

18 V AC ... 690 V AC (Ph/Ph)

11 V AC ... 400 V AC (Ph/N)

Input measuring range using transformer

Primary

Secondary  

60 V AC ... 2,000,000 V AC

60 V AC ... 400 V AC

Overvoltage (permanent)

760 V AC Ph/Ph

440 V AC Ph/N

Crest-Faktor

>2

Power consumption

<0.5 VA

In- /Output impedance

L1, L2, L3, N = 5 MOhm

Accuracy

0.1% (20%...120 Un)

Current measurement, current transformer

Input type    

differential

Nominal current In:

Primary (dependent on external current transformer)

Secondary    

1 A AC ... 20,000 A AC

1 A AC or 5 A AC

Measuring range

0.05%...120 In
Overload (continous)

20 A AC

Overload (short-term)

50 A for 1 s

Crest-Faktor

>2

Power consumption

<0.5 VA

In- /Output impedance

<1 Ohm

Accuracy

0.2% (10% ... 120% In)

Protection

Protected via protective impedances

Power measurement

Accuracy, active power:

0.2% (in acc. with DIN EN 61557-12)

Accuracy, reactive power:

0.5% (in acc. with DIN EN 61557-12)

Accuracy, apparent power:

0.5% (in acc. with DIN EN 61557-12)

Active energy in accordance with 62053-22

Class 0.2 S

Active energy in accordance with ANSI C12.1-2024

Class 0.2

Active energy (Meter-Only Accuracy class) in accordance with NEMA SM 31000-1/-2

Class 0.2

Reactive energy in accordance with EN 62053-23

Class 0.5

Pulse value, LED test output

0.1 Wh/Imp

Supply (DC variants)

Supply voltage range

18 V AC ... 30 V DC

Nominal supply voltage

24 V DC +/-25%

Power consumption

<4 W

Digital input in accordance with 61131-2 (type 3)

Number of inputs

1

Nominal voltage

24 V DC

Input voltage range

0 V DC ... 30 V DC

Current input signal

2 mA...15 mA

Protection

250 mA (fast-blow)

Protective circuit

Protection against incorrect DC connection (max. 30 V)

Signal ON time

≥30 ms

Signal OFF time

≥30 ms

Digital output in accordance with 61131-2 (type 3)

Number of outputs

1 (configurable semiconductor output)

Nominal voltage

24 V DC

Output voltage range (for open output)

19.2 V DC ... 30 V DC

Output current range

0 mA ...100 mA

Protection

250 mA (fast-blow)

Protective circuit

Protection against incorrect DC connetion (max. 30 V)

Behaviour in case of voltage interruptions

If the 24 V DC supply is interrupted, the output is not active (status = 0)

Total delay time

500 ms including transient period and overshoot when changing over full range

Communication interface

Ethernet X1

RJ45/LAN - 100Base-TX

Protocol

BACnet IP, ModbusTCP, REST API (HTTP)

Serial interface

2.4 kBit/s ... 115.2 kBit/s

RS-485

BACnet MS/TP, ModbusRTU

Display

Type

LCD display, two-color, backlit

Refresh

adjustable: 500 ms, 1 s, 2 s

Electrical isolation

Reinforced insulation: housing against all potentials

Overvoltage category III at 300 V AC

Overvoltage category II at 600 V AC 

IEC 61010-1

Reinforced insulation: supply against all other potentials

Overvoltage category III at 300 V AC

Overvoltage category II at 600 V AC

IEC 61010-1

Reinforced insulation: voltage measurement input against all other
potentials

Measurement category III at 300 V AC

Measurement category II at 600 V AC 

IEC 61010-2-30

Functional insulation: current measurement input against all other potentials

 

Functional insulation: digital I/Os

 

Functional insulation: communication interface

 

Test voltage (reinforced insulation)

4 kV AC (50 Hz, 1 min.)

Test voltage (functional insulation)

1 kV AC (50 Hz, 1 min.)

Ambient conditions

Degree of protection

IP20 (housing)

IP40 (display)

Ambient temperature (operation)

-25°C ... +70°C

Ambient temperature (storage/transport)

-30°C … +80°C

Permissible humidity (operation

≤95% non-condensing

Altitude

≤2,000 m

Pollution degree

2

Mechanical requirements

Vibration resistance (DIN EN 50470-1)

1 g (10 Hz … 150 Hz)

Shock resistance (IEC 60068-2-27)

30g/18 ms

Connection data

Conductor cross section, current (rigid/flexible)

0.2 mm² ... 4 mm² / 0.2 mm² ... 6 mm²

Conductor cross section, voltage (rigid/flexible)

0.5 mm² ... 2.5 mm² / 0.5 mm² ... 4 mm²

Conductor cross section, supply (rigid/flexible)

0.14 mm² ... 2.5 mm²

Conductor cross section, digital I/O (rigid/flexible)

0.14 mm² ... 1.5 mm² / 0.14 mm² ... 2.5 mm²

Conductor cross section, communication (rigid/flexible)

0.14 mm² ... 2.5 mm²

Connection method

Screw connection

Tightening torque

0.5 Nm

Date and time

Precision of clock time during normal operation

±50 ppm

Precision of clock time during power reserve

±150 ppm

Duration of power reserve

<24 h

Time constant T

<1 h

Fuses

DI/DO

≤50 mA

Supply

≤16 A

Conformance/approvals

CE-compliant

RoHS, EMC, LVD

RoHS

EN 50581

EMC

EN 61000-6-2, EN 61000-6-3

LVD

EN 61010-1

UL, cULus-listed

UL 61010-1

UKCA-compliant

Yes

FCC Part 15 / ISED (ICES-003)

Class A

 


EMpro online documentation
Published/reviewed: 2026-07-10, en revision 004Version history