KROHNE UFM 3030 EEx EN - Manual (Page 15)

UFM 3030 15
3.4 Standard versions
The field cables enter the terminal compartment of the UFC 030…-EEx flow converter unit (i.e.
power supply, current and signal in-/outputs) and are non-intrinsically safe. To connect external
devices to the in-/output terminals, the wiring requirements for the type of protection 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 PE conductor of the mains supply must always 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 terminal arrangement for standard versions without NAMUR outputs
(non-MODIS) is shown below.
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, A2
P
I/C
L, 1L
≈
N, 0L
≈
PE/FE
Common earth contact for in-/output circuits
Analogue input : 0 – 20 mA / I
≤
25 mA
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