KROHNE IFC 110 Converter - Manual (Page 89)

Part D Technical Data, Measuring Principle and Block Diagram Sect. 10.1
05/2003 IFC 110 F 89
Status outputs (passive) D1 / D2 / A2 A1 (can also be operated as pulse output)
Function, set for trip point trip point
flow direction flow direction
automatic range change automatic range change
error identification error identification
overdriving overdriving
empty pipeline empty pipeline
Terminals D1 / D2 / D ⊥ / A2 / A ⊥ A1 / A ⊥
Please note: D ⊥ common reference potential for D1 and D2
A ⊥ common reference potential for A1 and A2
Electrical data galvanically isolated galvanically isolated, but not from A2
U ≤ 32 V DC / ≤ 24 V AC U ≤ 32 V DC / ≤ 24 V AC
I ≤ 100 mA, any polarity I ≤ 100 mA, any polarity
or U ≤ 32 V DC, I ≤ 200 mA, note polarity
Control inputs C1 and C2 (passive)
Function, set for automatic range change, totalizer reset, error reset, start self-test,
set outputs to min. values or hold last measured values of outputs
Terminals C1 / C ⊥ and C2 / C ⊥, galvanically isolated
Please note: C ⊥ common reference potential for C1 and C2
U = 8 – 32 V DC, I ≤ 10 mA, any polarity
Internal power supply for passive outputs and inputs and external receiver instruments
Terminals E + and E –, please note polarity, galvanically isolated
Electrical data U = 24 V DC / R
i
= approx. 15 Ohm / I ≤ 100 mA
Time constant 0.2 – 99.9 s, adjustable in increments of 0.1 second
Low-flow cutoff cutoff ”on“ value: 1 – 19 %
cutoff ”off“ value: 2 – 20 %
}
of Q
100%
, adjustable in 1% increments
Local display and operation 3-line back-lit LCD
Display function actual flowrate, forward, reverse, sum totalizers (7 digits)
or 25-character bar graph with percent display and status messages
Units: actual flowrate m³/h, liter/s., US gallons/min or user-defined unit, e. g. hecto liter/h
totalizer m³, liter, or US gallons or user-defined unit (adjustable counting time till overflow)
Language of plain texts English, German, French, Swedish, others on request
Display: 1st line 8-character, 7-segment, numerical and sign display,
and symbols for key acknowledgement
2nd line 10-character, 14-segment, text display
3rd line 6 markers to identify display in measuring mode
Operation elements 15 keys or as option with 3 additionally magnetic sensors for operation without
opening the housing
Electrode circuit
Type of protection intrinsic safety [EEx ib IIC]
Max. values (cumulative) U
0
= 18 V / I
0
= 40 mA / P
0
= 80 mW
Kinked characteristic capacitance C
0
≤ 225 nF / inductance L
0
≤ 5 mH
Field power supply
Type pulsed bipolar DC field for all KROHNE primary heads,
galvanically isolated from all input and output circuits
Terminals 2 x 7 and 8
Current / voltage ± 0.125 A (± 5%) / U
N
≤ 40 V DC (frequency controlled)
Clock frequency 1 /
36
to ½ of power frequency,
configurable to the calibration data of the primary head
Internal fuse protection I
N
≤ 160 mA
Power supply AC version AC / DC version (switch-selectable)
standard option, in preparation
Voltage range (without change over) 100 – 230 V AC 24 V AC 24 V DC
Tolerance band 85 – 255 VAC 20.4 – 26.4 V AC 18 – 31.2 V DC
Safety value U
m
= 253 V U
m
= 253 V U
m
= 253 V
Frequency 48 – 63 Hz 48 – 63 Hz –
Power consumption (incl. primary head) 18 VA, typical (max. 25 VA) 18 VA, typical (max. 25 VA) 18 W, typical (max. 18 W)
When connected to a functional extra-low voltage, 24 V AC / DC, protective separation (PELV) must be
ensured (VDE 0100 / VDE 0106 and IEC 364 / IEC 536 or equivalent national standards).
Approvals and housing
Material of field housing die-cast aluminium with polyurethane finish
Ambient temperature • operation standard -25 to +60 °C / -13 to +140 °F
EEx -20 to +55 °C / - 4 to +131 °F
EEx, special “S” -40 to +55 °C / -40 to +131 °F
• storage all versions -40 to +60 °C / -40 to +140 °F
Protection category (IEC 529 / EN 60 529) IP 65, equivalent to NEMA 4 / 4X
EU_EMC Directives
to EN 61326-1 (1977) and A1 (1998) directives and NAMUR Standard NE 21
Certificates and approvals II (2) G [EEx ib] IIC
PTB 02 ATEX 2136 X