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48
Special installations
- Combined inductances and capacitances of the complete multi-
plexer circuit shall never exceed the following ratings:
L
[mH] 1.00 0.50 0.20 0.10 0.05 0.02
0
C
[µF] 0.50 0.59 0.75 0.92 1.00 1.00
0
- Impedances of the input line (Master _Line) and the output line
(Next_Mux)are effectively connected through each multiplexer.
This shall be respected for the assessment of the complete system.
Impedances connected to each of the sensor-output and the sen-
sor-input circuits are effectively separated.
- Overview (electrical data):
Master_Line
Typ VIB 8.306--Ex--
Next_Mux
Typ VIB 8.306--Ex--
Sensor Vibration
Typ VIB 8.314--Ex--
Sensor Rotation
Typ VIB 8.313--Ex--
Sensor Temperature
Typ VIB 8.310--Ex--
5. Wiring to the HAZARDOUS AREAS EQUIPOTENTIAL BONDING
SYSTEM:
- For reasons of noise suppression, a line resistor of <120 mOhm is
recommended (120mOhm = 1.5qmm/10m cable length).
- Moreover, the safety regulations of personnel, goods, ... with res-
pect of lightning, explosion, electricity and, if necessary, any other
regulations of the respective customers, trade union, insurers,
country, confederation, etc. must be taken into account.
- The respective installation regulations regarding the safety of the
type of connection must also be followed here. Consequently, this
must be performed by an authorized specialist there who is insured
to do so.
6. Triaxial cable
• When using triaxial cables, the outer shield of the triaxial cable is:
• Connected to the HAZARDOUS AREAS EQUIPOTENTIAL
BONDING SYSTEM at the limiting device (PA).
• Connected to the MUX housing for the MUX outputs (Next_
Mux).
• Not connected to the MUX input (Master_Line) and for the
sensor, but reliably insulated instead (under shrinkage tube
or insulating cap, 5mm gap to the TNC plug.)
• Not connected to the metal housing at the junction box (VIB
6.770/13), but reliably insulated instead (or the metal hous-
ing should be insulated by shrinkage tube).
• Cable interconnections must be insulated by shrinkage tube
or insulating cap
U
= 13 V
C
= 17.33 nF
i
I
= 18 mA
i
L
= 0 µH
i
P
= 240 mW
i
i
U
= 13 V
C
= 17.33 nF
0
I
= 18 mA
i
L
= 0 µH
0
P
= 240 mW
i
0
U
= 13 V
C
= 0 nF
0
I
= 18 mA
i
L
= 0 µH
0
P
= 240 mW
i
0
U
= 13 V
C
= 11 nF
0
i
I
= 18 mA
(output)
0
P
= 240 mW
L
= 0 µH
0
i
U
= 3.6 V
C
= 0 nF
0
I
= 18 mA
i
L
= 0 µH
0
P
= 65 mW
i
0
C
L
: see above
0,
o
C
L
: see above
0,
o
C
= 25 nF
0
L
= 30 µH
0
C
= 110 nF
0
L
= 120 µH
0
C
= 3 nF
0
L
= 10 µH
0
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