KROHNE UFM 500 ATEX EN - Manual (Page 6)

5
Figure 2: Passive pulse/status output. Figure 3: Active current output.
NOTE:
The status output (terminals B1, B
⊥
and B2) can only be configured as passive outputs,
the current output (terminals I+ and I) can only be configured as active output.
2.2 Operation of the signal converter
The UFC 500-EEx signal converter unit of the UFM 500 K-EEx compact flowmeter is
equipped with a display unit that contains magnetic Hall sensors. These Hall sensors enable
the settings of the UFC 500-EEx signal converter electronics to be set resp. reset with the
help of the with the apparatus delivered bar magnet without opening the flameproof signal
converter housing in the hazardous area. Consult the standard Installation and Operating
Instructions (Part B) for the program functions of the software of the UFC 500-EEx
electronics unit.
3. CONNECTING CABLES
NOTE:
The below described cables are shown in the connection diagram on the following page.
Cable A:
Signal cable for current output and binary in-/outputs (pulse and status output). This cable
type must be in accordance with clause 9 of the EN 60079-14 "Electrical installations in
hazardous locations" or an equivalent national standard (e.g. DIN VDE 0165 Part 1).
Cable B:
Mains power supply cable. This cable type must also be in accordance with clause 9 of the
EN 60079-14 "Electrical installations in hazardous locations" or an equivalent national
standard (e.g. DIN VDE 0165).
Rated voltage:
≥
500 V
Examples: H07..-., H05..-. to HD 21.S2 or HD22.S2
Separate bonding conductor
Minimum cross-sectional area: 4 mm 2
~
B1 B
⊥
B2
I
≤
150 mA
U
ext
≤
32V DC /24 V AC
000
Electronic
or
electro-
mechanical
totalizer
I
≤
150 mA
U
ext
e.g. signal
indicator
Ri
≤
680
Ω
I+ I
mA
+
_