KROHNE ALTOFLUX IFM4042K EEx EN - Manual (Page 5)

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1.3.3 Cable or conduit entries
Dependent on the explosion protection type that the terminal compartment is configured with,
(see description on the previous page), can the terminal compartment be equipped with
cable entries or conduit adapters. The used cable entries (glands and/or blind plugs) must
have a ATEX approval in accordance with the type of protection of the terminal compartment.
Type of protection Intrinsic Safety category "ib" is only applicable for mains power supply
systems with a maximum voltage of U
m
= 60 V. In this case "EEx ib" approved cable entries
must be used, which are marked by a blue color.
The cable entry holes can be provided with a screw-thread size of Pg13.5, Pg16 or M20x1.5.
For flameproof conduit systems, the terminal compartment must have type of protection
flameproof enclosure "d" according to EN 50018. The conduits must be sealed by "EEx d"
approved (within the ATEX 100a directive) sealing devices (i.e. stopping box) directly at the
conduit entrances of the as flameproof enclosure performed terminal compartment.
ATEX approved "EEx d" cable glands, screw-threaded adapters as well as blind plugs are no
integral part of the delivery package and must be purchased by the customer himself or can
be ordered through their (local) Krohne representative as special parts !
2. ELECTRICAL CONNECTION
To connect external devices to the signal output terminals, the wiring requirements for the
type of protection of the compartment must also be conform to the international or national
standard involved (e.g. EN 60079-14). The terminal arrangement is shown by figure 1 below.
Figure 1: Terminal arrangement in terminal compartment.
The following outputs are available for connection to external circuits (see figure above):
•
Current output (terminals I, I
⊥
)
This circuit constitutes a passive 4-20 mA current loop and includes the HART protocol of
the communication device (the polarity is free to choice).
•
Additional power supply (terminals 1L=, 0L=)
These terminals are connected to provide the 2x2 wire mode (choice of polarity is free).
•
Binary outputs (terminals B1, B
⊥
, B2)
Terminals B1 and B
⊥
can be configured as pulse or status output through software.
Terminals B2 and B
⊥
can be configured as pulse or status output to NAMUR.
I
⊥
I B1 B
⊥
B2 1L= 0L=
CURRENT BINARY
OUTPUT OUTPUTS
PE (Protective Earth) terminal