Introduction to the manual
Contents of this chapter
This chapter describes the manual in short and gives some general information for the
reader. This chapter also contains a quick reference guide for implementing a safety system.
Applicability
This manual is applicable to ACS880-07/07LC/17/17LC/37/37LC drives which have the
option: Prevention of unexpected start-up (Q957).
This manual shows the default design of the safety circuit ordered with option code +Q957.
The actual design can be different from the default design because of customer-defined
modifications. Always refer to the documentation delivered with the drive.
Target audience
This manual is intended for people who install, commission, use and service the safety
function. Read the manual before working on the unit. You are expected to know the
fundamentals of electricity, wiring, electrical components, electrical schematic symbols, and
functional safety.
Exclusion of liability
ABB is not responsible for the implementation, verification and validation of the overall safety
system. It is the responsibility of the system integrator (or other party) who is responsible
for the overall system and system safety.
The system integrator (or other responsible party) must make sure that the entire
implementation complies with the instructions in this manual, all relevant standards, directives
and local electrical code, and that the system is tested, verified and validated correctly.
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Introduction to the manual 11
