Table of contents 5 Table of contents 1 Safety instructions Contents of this chapter ................Use of warnings and notes ............... Instructions for functional safety circuits ............Electrical safety precautions ..............2 Introduction to the manual Contents of this chapter ................Applicability ..................
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6 Table of contents 8 Fault tracing Contents of this chapter ................Fault tracing ..................Reporting problems and failures related to safety functions ......... 9 Maintenance Contents of this chapter ................Safety circuit maintenance ............... Proof test interval .................. Competence ..................Residual risk ..................
Safety instructions 7 Safety instructions Contents of this chapter This chapter contains the safety instructions which you must obey when you install, operate and do maintenance on the safety functions of a drive. Use of warnings and notes Warnings tell you about conditions which can cause injury or death, or damage to the equipment.
8 Safety instructions Instructions for functional safety circuits This manual does not contain the complete safety instructions of the drive. It only includes the instructions related to the scope of this manual. Only a qualified electrical professional who has sufficient knowledge about functional, machine, and process safety is permitted to install, start up and maintain the safety circuit.
Safety instructions 9 Electrical safety precautions These electrical safety precautions are for all personnel who do work on the drive, motor cable or motor. WARNING! Obey these instructions. If you ignore them, injury or death, or damage to the equipment can occur. If you are not a qualified electrical professional, do not do installation or maintenance work.
This manual is applicable to ACS880-07/07LC/17/17LC/37/37LC drives which have the option: Prevention of unexpected start-up (option +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.
Introduction to the manual 13 ACS880-07 (45 to 710 kW) manuals ACS880-07 (560 to 2800 kW) ACS880-07LC manuals manuals ACS880-17 (45 to 400 kW) manuals ACS880-17 (160 to 3200 kW) ACS880-17LC manuals manuals ACS880-37 (45 to 400 kW) manuals ACS880-37 (160 to 3200 kW) ACS880-37LC manuals manuals Terms and abbreviations...
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14 Introduction to the manual Term Description Performance level. Levels a...e correspond to SIL (EN ISO 13849-1) POUS Prevention of unexpected start-up Systematic capability (IEC 61508) Safety integrity level (1...3) (IEC 61508) SILCL Maximum SIL (level 1...3) that can be claimed for a safety function or subsystem (IEC/EN 62061) Safe torque off (IEC/EN 61800-5-2) Proof test interval.
This chapter describes the option +Q957, prevention of unexpected start-up, and its settings. Overview The option +Q957 uses a safety relay to implement the Prevention of unexpected start-up (POUS) safety function. ABB installs the safety relay to the drive at the factory.
For a detailed description of the drive STO function, see the hardware manual. The design principles of the option +Q957 comply with EN ISO 14118. The STO function complies with IEC/EN 61800-5-2. For a complete list of related standards and European...
Option description 17 Step Operation The user cannot start the motor while the drive STO is active. Normal operation resumes after the user: • sets the POUS switch [S] to the closed position • resets the drive (if the drive tripped on a fault) •...
POUS switch. Connect the POUS switch to the applicable terminals inside the drive cabinet. For the POUS indication lamp [P], ABB recommends an LED indication lamp. Refer to the circuit diagrams delivered with the drive. Obey the rules below: 1.
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20 Electrical installation 4. Make sure that the sum resistance for one channel (loop resistance) is not more than 70 ohms. 5. Obey the general control cable installation instructions given in the drive hardware manual.