KROHNE UFM 500 ATEX EN - Manual (Page 7)

6
4. CONNECTION DIAGRAM
Flow tube
Hazardous locations
of Zone 1 and 2
S1 S2
UFS 500…-EEx
Primary Head
Intrinsical safe sensor circuits
S3 S4
B1 B
⊥
B2 I+ I L N
BINARY CURRENT MAINS
OUTPUTS OUTPUT SUPPLY
TERMINAL COMPARTMENT
Standard "EEx e" (optional "EEx d")
ELECTRONICS COMPARTMENT
Always "EEx d"
Intrinsical safe ("ib") sensor outputs
"1" "3" "2" "4"
UFC 500…-EEx
Signal Converter
PE
FE
N L PE 100-240V AC
N L FE 24-48V AC
SIGNAL IN-/OUTPUTS L~ L~ FE 24V AC/DC
EQUIPOTENTIAL BONDING CONDUCTOR
≥ 4 mm
2
Flameproof (EEx d)
terminal feed-through
Flameproof (EEx d)
cable feed-through
4x Coaxial cable of
type RG 179 B/U
B A