This document describes the drive technology, drive automation, system integration, and service manual for SEW-EURODRIVE's MOVITRAC® MC07B Functional Safety Edition. The document provides detailed information on safety concept, safety functions, safety conditions, and connection variants.
This manual serves as a supplement to the MOVITRAC MC07B operating instructions, specifically addressing conditions and amendments for safety-related applications. It describes the system as a drive inverter with an AC motor and a safety-tested external disconnecting device. The documentation is intended for employees who assemble, install, start up, and service the product, ensuring safe operation and adherence to specified product characteristics.
The document outlines the integrated safety technology developed and tested according to Category 3 (EN 954-1:1996) and Performance Level d (EN ISO 13849-1:2008). It details the safety concept based on Safe Torque Off (STO), explaining how disconnecting the safety-related 24 V supply prevents the generation of a rotating field and automatic restart. Key safety functions described include STO and Safe Stop 1 (SS1), along with specific connection variants for single and group drives.
| Safety class | Category 3 |
|---|---|
| Performance level | PL d |
| Safety function | STO (Safe Torque Off) |
| Safety function | SS1(c) (Safe Stop 1) |
The assessment is based on Performance Level (PL) d according to EN ISO 13849-1:2008 and Category 3 according to EN 954-1:1996.
The safe condition is defined as safe torque off (STO), where the frequency inverter no longer supplies power to the motor for generating torque.
When activated, the frequency inverter stops supplying power to the motor, corresponding to a non-controlled stop (Stop category 0).