Selecting The Control Cables; Relay Cable; Coaxial Cable (For Use With Advant Controllers Ac 80 / Ac 800M) - ABB ACS800 Series Hardware Manual

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Selecting the control cables

All control cables must be shielded.
As a general rule, the control signal cable shield should be earthed directly in the
ACS800-67. The other end of the shield should be left unconnected or earthed
indirectly via a high frequency, high voltage capacitor of a few nanofarads
(e.g. 3.3 nF / 3000 V). The screen can also be earthed directly at both ends if they
are in the same earth line with no significant voltage drop between the end points.
Use a double shielded twisted pair cable (see figure a) for analogue signals. This
type of cable is recommended for the pulse encoder signals also. Employ one
individually shielded pair for each signal. Do not use common return for different
analogue signals.
A double shielded cable is the best alternative for low voltage digital signals but
single shielded twisted multipair cable (figure b) is also usable.
Run analogue and digital signals in separate, shielded 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 be run as twisted pairs.
Never mix 24 VDC and 115/230 VAC signals in the same cable.

Relay cable

The cable type with braided metallic screen (e.g. ÖLFLEX LAPPKABEL, Germany)
has been tested and approved by ABB.

Coaxial cable (for use with Advant Controllers AC 80 / AC 800M)

• 75 ohm
• RG59, diameter 7 mm or RG11, diameter 11 mm
• Maximum cable length: 300 m (1000 ft)
Planning the electrical installation
a
Double shielded twisted multipair
cable
b
Single shielded twisted multipair
cable