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LCI40
Series IOM
4. eleCtriCal ConneCtionS
4.5 Grounding the Measuring Sensor
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There should be no difference in
potential between the measuring
sensor and the housing or
protective earth of the signal
converter!
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For devices used in hazardous
areas, additional safety notes
apply; please refer to the Ex
documentation.
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The device must be grounded in
accordance with regulations in
order to protect personnel against
electric shocks.
4.6 Connecting Power, all housing variants
•
The measuring sensor must be properly grounded.
•
The grounding cable should not transmit any
interference voltages.
•
Do not use the grounding cable to connect more than
one device to ground.
•
The measuring sensors are connected to ground by
means of a functional grounding conductor FE.
•
In hazardous areas, grounding is used at the same
time for equipotential bonding. Additional grounding
instructions are provided in the separate “Ex
documentation”, which are only supplied together
with hazardous area equipment.
•
The protection category depends on the housing
versions (IP65 to 67 to IEC 529 / EN 60529 or
NEMA4/4X/6).
•
The housings of the devices, which are designed
to protect the electronic equipment from dust and
moisture, should be kept well closed at all times.
Creepage distances and clearances are dimensioned
to VDE 0110 and IEC 664 for pollution severity 2.
Supply circuits are designed for overvoltage category
III and the output circuits for overvoltage category II.
•
Fuse protection (IN
≤
16 A) for the infeed power
circuit, as well as a separator (switch, circuit breaker)
to isolate the signal converter must be provided close
to the device. The separator must be marked as the
separator for this device.