2 Engineering
2.10 STO function
60 DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com
2.10.2 TÜV certification
DA1 variable frequency drives with a TÜV logo on their nameplate feature an
STO function that complies with the following standards:
2.10.3 Safety relay specification
Safety component monitoring requires an approved safety relay.
When used together with a DA1 variable frequency drive, the following
minimum requirements must be met for the STO function:
DANGER
The STO function is an electronic mechanism that does not
provide sufficient protection against electric shock.
Additional potential isolation measures may be accordingly
required (e.g., switch-disconnector).
Standard Classification
EN 61800-5-2:2007 Type 2: “Safely removed torque”
EN ISO 13849-1:2006 PL d
EN 61508 (Part 1 to 7) SIL 2
EN60204-1 Stop category 0:
“Uncontrolled stopping by means of immediately cutting the
power supply to the machine drive elements”
EN 62061 SIL CL 2
￫
The following information and descriptions for the STO function
are translations of the original description in English
(TÜV specification).
Standard requirement SIL 2 or PL d SC 3 or better with interlocked opposing contacts
Number of output contacts Two independent
Rated switching voltage 30 V DC
Current carrying capacity
100 mA (at least)
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