KROHNE UFM 3030 EEx EN - Manual (Page 16)

16 UFM 3030
3.5 Namur versions
See connection diagram below for standard version with NAMUR outputs (non-MODIS)
See paragraph 4.4 how to set-up the NAMUR NE 43 failure indication
Symbols and specifications
Milliampère meter Ri
≤ 680 Ohm
Electronic or electro-mechanical totalizer
U
≤
32 V DC / 24 V AC; I
≤
150 mA
Switch, N/O contact 32 V DC / 1.5 mA
External power supply, DC voltage
For passive current output: V
ext
= 15 – 24 V DC; I ≥ 22
mA
For passive digital input: V
ext
= 15 – 32 V DC; I ≥ 1.5 mA
External power supply, DC or AC voltage
V
ext
≤ 32 V DC / ≤ 24 V AC: I ≤ 150 mA
External current source, e.g. temperature transducer
I
ext
≤
25 mA
Abbreviations and specifications
⊥
A1
P
⊥
P
I/C
L, 1L
≈
N, 0L
≈
PE/FE
Earth contact for current output and analogue input
Analogue input : 0 – 20 mA / I
≤
25 mA
Earth contact for pulse output
Pulse output :
≤
32 V DC /
≤
24 V AC: I
≤
150 mA
Current output I : 0 – 22 mA / Rload ≤ 680 Ohm / 24 V DC or
Digital input C : 0 – 5 V DC = ‘low’ / 15 – 32 V DC = ‘high’
Life mains supply terminal : 100…240 V AC, 24 V AC or 24 V DC
Neutral mains supply terminal : 100…240 V AC, 24 V AC or 24 V DC
Protective Earth / Functional Earth terminal
All in-/output circuits must be connected in passive mode. Observe the polarity of
the instrument: current (I) always flows towards A1, P and I/C (current sink) !
To connect external devices to the in-/output terminals, the wiring requirements for the specific type
of protection of the terminal compartment (standard: increased safety "e", optional: flameproof
enclosure "d") must be respected, see standard EN 60079-14 or the corresponding national
standard.