9
2 - Electrical connections
PRECAUTIONS
B
Despite the fact that the instrument
has been designed to work in an
harsh and noisy environmental
(level IV of the industrial standard
IEC 801-4), it is recommended to
follow the following suggestions.
A
All the wiring must comply with the
local regulations.
The supply wiring should be rout-
ed away from the power cables.
Avoid to use electromagnetic con-
tactors, power Relays and high
power motors nearby.
Avoid power units nearby, espe-
cially if controlled in phase angle
Keep the low level sensor input
wires away from the power lines
and the output cables.
If this is not achievable, use shield-
ed cables on the sensor input, with
the shield connected to earth.
2.2 PRECAUTIONS AND ADVISED CONDUCTOR COURSE
B
Conduit for supply and output cables
Conduit for low level sensor cables
B
B
6
5
4
3
2
1
12
11
10
9
8
7
L
N
A
C
E D
16
15
B B
6
5
4
3
2
1
12
11
10
9
8
7
L
N
A
C
E D
16
15
B
18
17
14
13
18
17
14
13
C
C
A
=
Supply
B
=
Outputs
C
=
Analog inputs
D
=
Analogue
Output
Serial Comm.s
E
=
Digital
input/output
M4UK.ed6 20-05-2005 11:43 Pagina 9
