5
80290C_MHW_2400_0908_ENG
Advice for Correct Installation for EMC
Instrument power supply
•
The power supply to the electronic equipment on the
switchboards must always come directly from an
isolation device with a fuse for the instrument part.
•
The electronic instruments and electromechanical
power devices such as relays, contactors, solenoid
valves, etc., must always be powered by separate
lines.
•
When the electronic instrument power supply is
strongly disturbed by the commutation of transistor or
power units or motors, an isolation transformer
should be used for the controllers only, earthing the
screen.
•
It is essential that the plant has a good earth
connection:
- the voltage between neutral and earth must not be >1V
- the Ohmic resistance must be < 6
Ω
;
•
If the mains voltage fluctuates strongly, use a voltage
stabilizer.
•
In the proximity of high frequency generators or arc
welders, use adequate mains filters.
•
The power supply lines must be separate from the
instrument input and output ones.
Inputs and outputs connection
•
The externally connected circuits must be doubly
isolated.
•
To connect the analogue inputs and analog outputs
the following is necessary:
- physically separate the input cables from those of the
power supply, the outputs and the power connections.
- use woven and screened cables, with the screen
earthed in one point only.
•
To connect the relay outputs
(contactors, solenoid valves, motors, fans, etc.), fit
RC groups (resistance and condensers in series) in
parallel to the inductive loads that operate in
Alternating Current.
(Note: all the condensers must conform to VDE
(class X2) standards and withstand a voltage of at
least 220V AC. The resistances must be at least 2W).
•
Fit a 1N4007 diode in parallel with the coil of the
inductive loads that operate in Direct Current.
GEFRAN S.p.A. declines all responsibility for
any damage to persons or property caused
by tampering, neglect, improper use or any
use which does not conform to the characte-
ristics of the controller and to the indica-
tions given in these Instructions for Use.
Generic standards, emission standard for residential
commercial and light industrial environments
Generic standards emission standard for industrial environment
Emission AC mains
Radiated emission
EN 61000-6-3
EN 61000-6-4
EN 61000-6-3
EN 61000-6-4
CISPR-16-1-4
CISPR-16-2-3
CEI R210-010
Classe B
Classe A
EMC EMISSION
EMC IMMUNITY
Generic standards, immunity standard of industrial environments
Electrostatic discharge immunity
Radiated radio frequency electromagnetic field immunity test
Conducted disturbances immunity
Electrical fast transient/burst immunity test
Surge immunity test
Power frequency magnetic field immunity test
Voltage dips, short interruptions and voltage immunity tests
EN 61000-6-2
EN 61000-4-2
EN 61000-4-3 +A1
EN 61000-4-6
EN 61000-4-4
EN 61000-4-5
EN 61000-4-8
EN 61000-4-11
± 4 kV contact discharge
± 8 kV air discharge
10 V/m amplitude modulated
80 MHz-1 GHz
10 V/m amplitude modulated
1.4 GHz-2 GHz
10 V/m amplitude modulated
0.15 MHz-80 MHz
± 2 kV power line
± 2 kV signal line
Power line-line ± 1 kV
Power line-earth ± 2 kV
Signal line-earth ± 1 kV
100 A/m
100%U, 70%U, 40%U,
LOW VOLTAGE DIRECTIVE SAFETY
Safety requirements for electrical equipment for measurement,
control and laboratory use
EN 61010-1
