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Direction for Use (GB) / Gebrauchsanleitung (D)
Converter CON 011
Direction for use
Connection must be made according to Fig 6 e.g. via safety barriers from Stahl of type:
Supply circuit: 9001/00−280/085/101
Measuring circuit: 9001/00−280/020/101
The safety barriers must be installed outside the explosive area in cabinets or control cubicles
with protection classes of at least IP 20 according to DIN 40 050.
In order to achieve compensations of electric potentials, the connectors for protective earth of
the barrier (mounting screw, internally connected to pin 2) must be linked to the corresponding
protective earth connectors within the explosive areas via a compensation line. The mounting
rail for the safety barriers has to be isolated.
The compensation line has to be rated according to VDE 0100 ’ 9 N, table 2 and ’ 21 Nb 1.1 to
1.4, minimum cross section 1,5 mm@ Cu. The connection terminals of these safety barriers may
be used for cables with cross sections of up to 2,5 mm@.
The total capacity is calculated from the sum of the capacities at the sensor input (refer to section
1.5. technical data), at the measuring signal output (between Out, ⊥ and screen) and at the
supply input (–24 V, ⊥ and screen). The capacity of the sensor circuit amounts to 1,2nF (cable
length 10m). Thus, the maximum permitted cable capacity between converter and safety
barriers is for protection class IIC: C
L
max = 49 nF and for IIB: C
L
max = 616 nF (wire / wire
and wire / screen). The maximum permitted line inductance between converter and safety
barriers is L
L
max = 1,6 mH for IIC resp. L
L
max = 8 mH for IIB. The following table shows the
resulting cable length l between converter and safety barrier:
Protection class: IIC IIB
• Cable LiYCY−CY 2x2x0,25 and
meas. cable PT 1492/00 with C = 2 x 150nF/km Lmax = 163 m > 1000 m
• Low capacity cables C = 2 x 60nF/km, Lmax = 408 m > 1000 m
e. g. Li2YCY (TP)
In case of extremely long cables between safety barriers and measuring amplifiers, the upper
cut−off frequency might be reduced by the series resistor of the barrier (1510 Ω) and the line
capacity:
3dB at f = 2kHz and C
L
= 50nF, corresponding to 330m cable length with 150nF/km
1dB at f = 2kHz and C
L
= 25nF, corresponding to 165m cable length with 150nF/km
!
When operating the CON 011 Signal Converter in hazardous areas, the instal-
lation has to be carried that the converter is not exposed to strokes or mecha-
nical shocks and friction of metallic parts at the converter housing is avoided.
Since the housing is installed steadily at the machine and must not be cleaned, there is no
danger of electrostatic charges of the plastic parts.
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