EMM-7
instruction manual
IM442-EU-F v0.4
pag. 2
INSTALLATION
WARNING FOR THE USER
Read carefully the instructions/indications contained in this manual before installing and using the instrument.
The instrument described in this manual is intended for use by properly trained staff only.
SAFETY
This instrument has been manufactured and tested in compliance with EN 61010-1standards. In order to maintain these conditions
and to ensure safe operation, the person must comply with the indications and markings contained in the manual. When the
instrument is received, before beginning installation, check that it's O.K. And it has not suffered any damage during transport. When
starting installation make sure that the operating voltage and mains voltage are compatible with the device instructions. The
instrument power supply must not be earthed. Maintenance and/or repair must be carried out only by qualified and authorized
personnel. If there is ever the suspicious that, that there is a lack of safety ,during operation, the instrument must be disconnected
and cautions taken against accidental use.
Operation is no longer safe when: - The instrument doesn't work. / - The measured value are obviously wrong or
unreasonable / - There is clearly visible damage. / - After serious damage incurred during transport. / - After a storage
under unfavourable conditions
CONNECTION
For a correct use of the device, the wiring diagram contained in the present manual, must be respected.
The connections are the same for all models and are subdivided in three groups:
- auxiliary power supply:
On the instrument are available 4 terminals to connect the auxiliary power supply to the instrument:
Vac version
Vac/cc version
Vac/cc version
Terminals
Power Supply
Terminals
Power Supply
Terminals
Power Supply
1-2
0-110V = 100-125Vac 50-60Hz
1-3
0-230V = 220-240Vac 50-60Hz
1-4
0-400V = 380-415Vac 50-60Hz
1-3
20-60Vac
24-72Vdc
1-3
85-230Vac
90-250Vdc
It’s possible, for example, to take the auxiliary power supply between phase and neutral, in a 4 wires system, or
phase-phase in a 3 wires system, without neutral or from a VT in a medium voltage application.
- measure voltage inputs:
4 terminals are available for the connection to the 3 phase and neutral of the network of measure, the maximum
voltage phase to phase shouldn't be over 500 V rms.
In case of a 3 phase system without neutral, or non distributed neutral to leave terminal N free.
- measure current inputs:
6 terminals are available for the connection to 3 external amperometric transformers with secondary 5A, it’s possible
to use 2 TA on lines with 3 wires (insertion three phase Aron).
The utilization of external TA is obligatory.
With the neutral current input option installed, the multimeter allows the measure of the neutral current, using a current
transformer /5A; the secondary must be connected to the In S1 and S2 terminals available on the rear of the
instrument (see the wiring diagram).
REMARKS: It's a must to respect the phase sequence. The connections between current and voltage phase inputs must not be
inverted (for example, CT placed on phase L1 must correspond to the I1 input). So as it is not correct to invert S1 and S2 terminals,
since power factors and powers might not be reliable.
For fixing the flush mount version instrument to the panel, use the fixing devices supplied, by inserting them in the side groves of the
enclosure and tighten the screws.
For safety reasons, place an external fuse protection at the input voltages, and use adequate cables for the working voltages and
currents, with a cross sections from 0,5 to 2,5 mm
2
.
WIRING DIAGRAMS
extractible
screw
terminals
rear
panel
Pin-out
EMM-7
(complete)
1
3
4
2
!
DI+
DI–
Do1
Do2
C.o
B
A
gnd
S1 S2
I
N/
I
'
RS485
OPTIONS:
Ao+
Ao-
I
'
I
S2
S2
S1
S1
S1
S2
VL1
VL2
VL3
N
I3
I2
I1
CURR
E
N
T
IN
P
U
T
S
VO
LT
A
G
E
IN
PU
T
S
V. AUX
POWER SUPPLY
DI
G
IT
A
L O
U
T
P
U
T
S
C
T
..
./1
A
C
T
..
./5
A
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Pag 2
