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Selecting the control cables It is recommended that all control cables be shielded. Double-shielded twisted pair cable is recommended for analog signals. For pulse encoder cabling, follow the instructions given by the encoder manufacturer. Use one individually-shielded pair for each signal. Do not use a common return for different analog signals. Double-shielded cable is the best alternative for low-voltage digital signals but single-shielded twisted multipair cable (Figure b) is also usable.
a Double-shielded twisted pair cable
b Single-shielded twisted multipair cable
Run analog 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 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. Ă–LFLEX by Lapp Kabel, Germany) has been tested and approved by ABB. Control panel cable The cable connecting the control panel to the drive must not exceed 3 metres in length. The cable type tested and approved by ABB is used in control panel option kits.
Connection of a motor temperature sensor to the drive I/O See page 64.
Routing the cables Route the motor cable away from other cable routes. Motor cables of several drives can be run in parallel installed next to each other. It is recommended that the motor cable, input power cable and control cables be installed on separate trays. Avoid long parallel runs of motor cables with other cables in order to decrease electromagnetic interference caused by the rapid changes in the drive output voltage.
Planning the electrical installation