KROHNE IFC 210 E-EEx EN - Manual (Page 12)

Sect. 1.3.5 Part A System installation and start-up
IFC 210 E 05/2002
12
1.3.5 Connection diagrams for power supply and primary head
PLEASE NOTE: Undocumented contacts/terminals to remain unwired.
The figures in brackets indicate the stranded drain wires for the shields
(see cross-sectional drawing of signal cable in Section 1.3.1).
•
Electrical connection to VDE 0100 "Regulations governing heavy-current installations with
line voltages up to 1000 V" or equivalent national regulations.
•
24 V AC / DC power supply: Functional extra-low voltage with protective separation in
conformity with VDE 0100, Part 410 or equivalent national
regulations (IFC 020 E: 24 V DC in preparation).
•
Fuse protection of the feed line circuit with I
RAT
≤
16 A is required. Also, a disconnecting
device (switch/circuit breaker) must be provided in the vicinity of the solidly connected signal
converters or device groups, refer to EN 61 010. This disconnecting device must be easy to
reach and also identifiable as such.
* Contacts 2d, 2z, 4d, 4z of
XA must be electrically
connected. ** Connection to 8d and/or
8z of XA. *** Contacts d2 to d32 of XB
are of leading type, for
connection of PE (safety
conductor) or FE
(functional ground).
At least 4 contacts with
adequate cross-section to
be electrically connected.
Important:
Electrical connection of EEx primary heads and EEx signal converters
To be carried out as described in Sect. 1.3.6.