Specifications

RTS 2nd Generation SERVO AMPLIFIER

PVD 3487 GB 03/2004

4. - ELECTRICAL CONNECTIONS

4.1 General Wiring Requirements

4.1.1 Appliance handling

See the safety instructions given at the beginning of this manual. In particular, wait for all the front

panel LEDs to go off completely before doing any work on the servo-amplifier or servomotor.

4.1.2 Electromagnetic compatibility

EARTHING

Comply with all local safety regulations concerning earthing.

Utilize a metal surface as an earth reference plane (e.g. cabinet wall or assembly grid).

This conducting surface is termed the potential reference plate. All the equipment of an

electrical drive system is connected up to this potential reference plate by a low

impedance (or short distance) link. Ensure the connections provide good electrical

conduction by scraping off any surface paint and using fan washers. The drive will then

be earthed via a low impedance link between the potential reference plate and the earth

screw at the back of the RTS. If this link exceeds 30 cm, a flat braid should be used

instead of a conventional lead.

CONNECTIONS

Do not run low-level cables (resolver, inputs/outputs, NC or PC links) alongside what are

termed power cables (power supply or motor). Do not run the power supply cable and

the motor cables alongside one another otherwise mains filter attenuation will be lost.

These cables should be spaced at least 10 cm apart and should never cross, or only at

right-angles.

Except for the resolver signals, all low-level signals will be shielded with the shielding

connected at both ends. At the RTS end, the shielding is made continuous by the Sub-

D connector mechanism.

The motor cables are limited to the minimum functional length. The yellow and green

motor cable lead must be connected to the box or front panel terminal block with the

shortest possible link.

This usually means shielded motor cable is not required. Chokes may also be inserted

into the motor phase leads.