9
2 - Electrical wirings
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 strongly recom-
mended 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
A
= Supply
B
= Outputs
C
= Analog inputs
D
= Analogue output
Serial
communications
E
= SSR drive output
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
M1UK.ed5 14-05-2009 14:56 Pagina 9
