KROHNE BM 100A ATEX EN - Manual (Page 9)

Section 3 - Electrical installation
10/2001 BM 100 A ATEX 9
Type of protection EEx di or EEx ei
Devices with intrinsically safe I/O functions must be provided
with an additional separator in the terminal compartment.
The separator is used for dividing the terminal compartment
safely into an area for the supply lines and one for the I/O
connection cables.
Turn the separator upwards and to the side to wire up the I/O
connecting cables.
3.2 Connecting cables
The connecting cables for the non-intrinsically safe power circuits and the non-intrinsically safe or
intrinsically safe I/O circuits must be in keeping with the valid installation standard (e.g. EN 60079-
14 / VDE 0165).
Where elevated process temperatures (above 100°C) are concerned, use heat-resistant cables
with a continuous service temperature of
≥
75°C in conformity with the type test certificate.
3.3 Connection of supply power and I/O functions
•
Before connecting or disconnecting the electrical interconnecting cables of the device, make
sure that all cables leading to the signal converter are isolated from the reference potential
(ground) of the hazardous location ,. This also applies to protective conductors (PE) and
equipotential bonding conductors (PA).
•
Carefully insulate all cores and shields of the connecting cables not safety-connected to the
equipotential bonding system for the hazardous location from each other and from ground
(insulation test voltage 500V
rms
for conductors in intrinsically safe cables, insulation test voltage
1500V
rms
for conductors in non-intrinsically safe cables).
•
Connect all shields by the shortest possible route to the press-fitted U-clamp terminal (FE) in
the terminal compartment. If shields are to be grounded at both ends (e.g. for EMC reasons),
adequate equipotential bonding is required between the two shield ends to avoid unacceptable
equalizing currents.