ABB ACQ800 Series, Руководство по оборудованию

Страница: 64 / 140

64 ACQ800-37 Hardware Manual
Planning the electrical installation
Selecting the control cables
All control cables must be shielded.
Use a double-shielded twisted pair cable (see figure a) for analog 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 analog 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 analog 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 V DC and 115 / 230 V AC signals in the same cable.
Relay cable
The cable type with braided metallic screen (e.g. ÖLFLEX by Lapp Kabel) has been
tested and approved by ABB.
Control panel cable
In remote use, the cable connecting the control panel to the drive must not exceed
3 m (10 ft). The cable type tested and approved by ABB is used in control panel
option kits.
Coaxial cable (for use with Advant Controllers AC 80/AC 800)
• 75 ohm
• RG59, diameter 7 mm or RG11, diameter 11 mm
• Maximum cable length: 300 m (1000 ft)
a
Double-shielded twisted
pair cable
b
Single-shielded twisted
multipair cable