Selecting the control
cables
General
rules
The analog control cable (if analog input AI is used) and the cable used for the
frequency input must be shielded.
Use a double-shielded twisted pair cable (Figure a, for example, JAMAK by Draka
NK Cables) for the analog signal.
A double-shielded cable is the best alternative for low-voltage digital signals, but a
single-shielded or unshielded twisted multipair cable (Figure b) is also usable.
However, for frequency input, always use a shielded cable.
a
Double-shielded
twisted
multipair
cable
b
Single-shielded
twisted
multipair
cable
Run the analog signal and digital signals in separate cables.
Relay-controlled signals, providing their voltage does not exceed 48 V, can be run in
the same cables as digital input signals. It is recommended that the relay-controlled
signals are run as twisted pairs.
Never mix 24 V DC and 115/230 V AC signals in the same cable.
Relay cable
The cable type with braided metallic screen (for example, ÖLFLEX by LAPPKABEL)
has been tested and approved by ABB.
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