Samson 3430, Руководство по эксплуатации

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7.2 Electrical connection
The electrical components only apply to
controller stations with i/p converter addi-
tional modules for controlled variable x, ex-
ternal reference variable wext and/or with
inductive limit switches.
Caution!
For electrical installation, you are re-
quired to observe the relevant elec-
trotechnical regulations and the acci-
dent prevention regulations that ap-
ply in the country of use. In Germa-
ny, these are the VDE regulations
and the accident prevention regula-
tions of the employers' liability insu-
rance association.
The following standards apply for
assembly and installation in hazar-
dous areas: EN 60079-14: 2003
(VDE 0165 Part 1/8.98)
"Electrical
apparatus for explosive gas atmo-
spheres"
and EN 50281-1-2: 1999
(VDE 0165 Part 2/11.99) "Electrical
apparatus for use in the presence of
combustible dust"
.
For the interconnection of intrinsical-
ly safe electrical equipment, the per-
missible maximum values specified
in the EC type examination certifica-
te apply (U
i
or U
0
; I
i
or I
0
; P
i
or P
0
; C
i
or C
0
, and L
i
or L
0
).
Note!
The terminal assignment spe-
cified in the Mounting and Opera-
ting Instructions must be adhered to.
Reversing the assignment of the elec-
trical terminals may cause the explo-
sion protection to become ineffective.
Do not tamper with painted screws.
Note on the selection of cables and wires :
To install intrinsically safe circuits, observe
section 12 of the standard EN 60079-14:
2003 (VDE 0165 Part 1).
To run multi-core cables or lines with more
than one intrinsically safe circuit, section
12.2.2.7 of this standard applies.
Devices used at ambient temperatures down
to –40 °C must have metal cable entries.
The terminals on the base plate can be ac-
cessed after unscrewing the front cover be-
neath the display. For operation of the limit
switches, switching amplifiers which comply
with EN 60947-5-6 must be connected in
the output circuit.
26
EB 7030 EN
Connections
w
ext
x
– + + – – + – +
12 11 21 22 42 41 52 51
w
ext
x
+
–
+
–
42
41
52
51
22
21
11
12
–
+
+
–
Fig. 16 · Connecting i/p converters and limit switches
Sw. amplifier
Type 3432
Controller
Station
Type 3431
Controller
Station
4(0)...20 mA
4(0)...20 mA
Sw. amplifier
Limit switches
i/p converter
i/p converter
Limit switches