KROHNE IFC 090 Converter EN - Manual (Page 8)

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1.3 Electrical connection of separate primary head (F Versions)
1.3.1 General information on signal cable A and field current cable C
Use of the Krohne signal cable A with foil screen and magnetic shield will ensure proper operation
of the equipment.
• Signal cable to be solidly laid.
• Connect shields via stranded drain wires.
• Underwater and underground installation possible.
• Insulating material is flame-retardant to IEC IEC 332.1 / VDE 0742.
• Signal cables are low in halogen, unplasticized, and stay flexible at low temperatures.
Signal cable A (Type DS), with double shielding
1 Stranded drain wire, 1st shield, 1.5 mm 2 or AWG14
2 Insulation
3 Conductor 0.5 mm 2 or AWG 20 (3.1 red / 3.2 white)
4 Special foil, 1st shield
5 Inner sheath
6 Mu-metal foil, 2nd shield
7 Stranded drain wire, 2nd shield, 0.5 mm 2 or AWG 20
8 Outher sheath
Field current cable C with single shielding
Cross-section is dependent on required length of cable, see Table in Sect. 1.3.4.
1.3.2 Stripping (preparation) of signal cable A
Please note the different lengths given in the table for signal converter and primary head.
Length Converter Primary
head
mm (inch) mm (inch)
a 70 (2.80) 90 (3.60)
b 08 (0.30) 08 (0.30)
c 25 (1.00) 25 (1.00)
d 08 (0.30) 08 (0.30)
e 50 (2.00) 70 (2.80)
Customer-supplied materials
W Insulation tubing (PVC), 2.0 - 2.5 mm dia. (1”)
X Heat-shrinkable tubing or cable sleeve
Y Wire end sleeve to DIN 41 228: E 1.5-8
Z
Wire end sleeve to DIN 41 228: E 0.5-8
Please note:
For primary heads, stranded drain wire 1
must have the same length as stranded drain wire 7.
See Section 1.3.4 for max. permissible cable lengths
Signal cable A
bending radius
≥
50 mm (
≥
2”)