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Conditions for the safe operation (MUXes and sensors):
1. Responsibility for the installation of intrinsically safe systems:
- Each intrinsically safe company has an authorized EX protection
representative who is solely aware which conditions, norms, etc.
must be observed in his company. Only the specialist personnel he
authorizes are allowed to work on the system.
- The following installation recommendation must be authorized by
the EX protection authorized representative.
2. Limiting device VIB 3.550
- The limiting device must be installed in the VIBRONET Signalmas-
ter cabinet.
- The limiting device should be >50 mm (thread length) away from
non-intrinsically safe circuits.
- The potential equalization connector (PA) should be connected
first and individually to the HAZARDOUS AREAS EQUIPOTENTIAL
BONDING SYSTEM.
- The VIBRONET Signalmaster cabinet should be earthed with the
HAZARDOUS AREAS EQUIPOTENTIAL BONDING SYSTEM at the
position of the limiting device.
- The only earthed position of the intrinsically safe circuits in the
intrinsically safe area is the limiting device.
- It should have potential equalization with the machines to be
monitored.
3. Sensors
- All sensors must be insulated against the machines.
4. MUX - Multiplexer
- The multiplexer housing should be connected to the HAZARDOUS
AREAS EQUIPOTENTIAL BONDING SYSTEM on site.
- The sensors must be connected with the respective intrinsically
safe modules in the multiplexer.
- Vibration transducers with the Vibration module (VIB 8.314 Ex),
temperature probe with the temperature module (VIB 8.310 Ex)
and RPM sensors with the RPM module (VIB 8.313-1 Ex).
- The software must take into account an additional resistance of
2 Ohm as the external resistance of the temperature module. The
Vibration module has a resistor of 100 Ohm to balance out the sen-
sor capacity.
- The EC-type Examination Certificate EPS 15 ATEX 1 040, available
on the PRÜFTECHNIK homepage, must also be observed:
https://www.pruftechnik.com/com/About-us/Company/Certificates-
and-Material-Safety/
- All electronic circuits comply with kind of ignition protection Ex ib
IIC. The sensor circuits shall only be connected to load circuits.
- The VIBRONET Multiplexer type VIB 8.3...--Ex-- is supplied ba an
associated apparatus type VIB 3.550. Electrical output ratings:
U
= 13 V; I
= 18 mA; P
0
0
= 240 mW, rectangular characteristic.
0
47
Special installations
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