KROHNE IFC 110 Converter - Manual (Page 11)

Part A System installation and start-up Sect. 1.3.4
05/2003 IFC 110 F 11
1.3.4 Cable lengths (max. distance between signal converter and flow sensor)
Abbreviations and explanations
The abbreviations used in the following tables, diagrams and connection diagrams stand for:
A
Signal line A (type DS) with double shielding, max. length see diagram
B Signal line B (type BTS) with triple shielding, max. length see diagram
C Field current line, minimum cross section (A
F
) and max. length see table
D High-temperature silicone line, 3x1.5 mm² (14 AWG) Cu, with single shield,
max. length 5 m (16 ft)
E High-temperature silicone line, 2 x 1.5 mm² (14 AWG) Cu, max. length 5 m (16 ft)
A
F
Cross section of field current line C in Cu, see table
L Cable length in m or ft
Κ Electrical conductivity of the process liquid
ZD Intermediate connection box required in connection with lines D and E for flow sensors
ALTOFLUX 4000 F, PROFIFLUX 5000 F and VARIFLUX 6000 F for process temperatures
exceeding 150°C (302°F).
Recommended length of signal line
for magnetic field frequencies
≤
1/6 x power frequency
Flow Meter size Signal Please note!
sensor DN mm Inch line
VARIFLUX 6000 F 2.5 - 15
1
/
10
-
1
/
2
B1
25 - 80 1 - 3 A1 / B3
PROFIFLUX 5000 F 2.5 -
1
/
10
- B1
4 - 15
1
/
6
-
1
/
2
B2
25 - 100 1 - 4 A1 / B3
ALTOFLUX 4000 F 10 - 150
3
/
8
- 6 A1 / B3
200 - 1200 8 - 48 A2 / B4
ALTOFLUX 2000 F 150 - 250 6 - 10 A2 / B4
ECOFLUX 1000 F 10 - 150
3
/
8
- 6 A1 / B3
M900 10 - 300
3
/
8
- 12 A2 / B4
For application with
empty pipe detection
(EPD) max. length
< 20 m / 66 ft.
Max. length and minimum cross section of field current line
Length L
Cross section AF (Cu), minimum
0 to 150 m 5 to 500 ft 2 x 0.75 mm² Cu 2 x 18 AWG
150 to 300 m 500 to 1000 ft 2 x 1.50 mm² Cu 2 x 14 AWG
300 to 600 m 1000 to 1900 ft 4 x 1.50 mm² Cu 4 x 14 AWG