41
Installing Equipment
Connection to Central Controller Polytron SE Ex:
— The cable resistance must not exceed 20
Ω
per core.
This results in the following maximum distances for the various cross-sections:
●
Connect terminals 1, 2 and 3 of the sensing heads with the terminals 1, 2, and 3
of the device rack as shown.
●
Carefully connect all wires of the signal cable.
The signal cable has to be selected in accordance to local electrical codes and
the temperatures it will be used in.
Core cross- section
1.0 mm
2
1.5 mm
2
2.5 mm
2
4.0mm
2
maximum cable length
950 m
1 450 m
2 400 m
3 800 m
1
+
–
2
3
0042344
7_06.eps
➀ ➁ ➂
➀ ➁ ➂
Polytron SE Ex
1 ... 12
PE
1
2
3
4
4
Polytron SE Ex
3
2
1
+
–
1 ... 12
3
2
1
Summary of Contents for SE Ex HT M
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