Wiring; Use - ABB ACS800 Series Hardware Manual

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• EN 954-1:1996 "Safety of machinery – Safety-related parts of control systems –
Part 1: General principles for design"
• EN ISO 13849-2:2003 "Safety of machinery – Safety-related parts of control
systems – Part 2: Validation".

Wiring

Install on a control desk near the machinery:
• switching/disconnecting device for the circuitry. "Means shall be provided to
prevent inadvertent, and/or mistaken closure of the disconnecting device."
EN 60204-1: 1997.
• indicating lamp; on = starting the drive is prevented, off = drive is operative.
For connections to the drive, see the circuit diagram delivered with the drive.

Use

WARNING! The Prevention of Unexpected Start function does not disconnect the
voltage of the main and auxiliary circuits from the drive. Therefore maintenance work
on electrical parts of the drive or the motor can only be carried out after isolating the
drive system from the main supply.
Note: The Prevention of Unexpected Start function is not intended for stopping the
drive. If a running drive is stopped by using the Prevention of Unexpected Start
function, the drive will cut off the motor supply voltage and the motor will coast to
stop.
Prevention of Unexpected Start for ACS800-07/U7/17/37 (+Q950)