Connecting Cable - ABB 265DS Operating Instruction

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5.8

Connecting cable

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Communication between the transmitter and PC or laptop is only possible if the cabling meets
the following requirements:
It is recommended that shielded, twisted pair cables are used.
The minimum wire diameter depends on the line length.
Line lengths up to 1,500 m (4,921 ft): 0.51 mm (0.02 inch)
Line lengths above 1,500 m (4,921 ft): 0.81 mm (0.03 inch)
The maximum line length is limited.
Dual-core cable: 3,000 m (9,842 ft)
Multi-core cable: 1,500 m (4,921 ft)
The actual possible line length of the electrical circuit depends on the total capacitance and
resistance, and can be estimated using the following formula:
65
=
L
L
R
C
C
f
Avoid routing cables with other electrical cables (with inductive load, etc.) or near large electrical
equipment.
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Important
The shielding for the connecting cable should only be grounded at one side.
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IM/265D/V-EN-02
6
+
×
10 C 10000
f
−
×
R C C
= Line length in meters
= Total resistance in Ω (ohms)
= Line capacitance in pF/m
= Maximum internal capacitance of the HART field devices located in the circuit, in pF
265Dx, 265VS
Electrical connection
35