KROHNE UFM 3030 EEx EN - Manual (Page 17)

UFM 3030 17
3.6 MODIS versions
The field cables of the non-intrinsically safe power supply and the intrinsically safe "ia" signal in-
/outputs enter the terminal compartment of the UFC 030i-EEx flow converter unit via two separate
entrances. To connect external devices to the intrinsically safe signal output terminals, the wiring
requirements for their type of protection as well as of the compartment (standard: increased safety
"e", optional: flameproof "d") must be conform to the international or national standard involved (e.g.
DIN VDE 0165, paragraph 5.6).The figure below shows the terminal arrangement inside the
terminal compartment for the MODIS versions (i.e. UFC 030i-EEx).
Terminal arrangement of MODIS versions in
terminal compartment.
1)
2)
3)
4)
5) Metal dividing plate for separation of IS and non-
IS terminals
Connecting terminals for intrinsically safe signal
inputs/outputs
Connecting terminals for non-intrinsically safe
power supply
L / N : 100…240 V AC
1L
≈
/ 0L
≈
: 24 V AC/DC
PE : Protective Earth
FE : Functional Earth
Cable entrance for intrinsically safe sensor cable
Cable entrance for non-intrinsically safe power
supply cable
NC: Not connected
The PE conductor of the mains supply must be connected to the M5 clamp terminal marked with the
safety earth symbol, which is press-fitted into the dividing aluminum wall of the flameproof flow
converter housing. The following table below lists the electrical data of the non-intrinsically safe
power supply.
Power Supply
Electrical data
24 V AC/DC
terminals 1L
≈
, 0L
≈
, FE
24 V AC +15%/-10%, 48 - 63 Hz, 8 W of
24 V DC +33%/-25%, 8 W
100…240 V AC
terminals L, N, PE 100…240 V AC +10%/-15%, 48 - 63 Hz, 11 W
The non-intrinsically safe terminals for connection of the power supply (L, 1L
≈
and N, 0L
≈
) must be
connected in accordance with the relevant standard code of practice for electrical apparatus
intended for use in potentially hazardous locations, type of protection increased safety "e" or type of
protection flameproof enclosure "d", depending on the type of protection of the terminal
compartment of the flow converter housing.
I
⊥
I D D
⊥
I
⊥
I B B
⊥