Tüv Certification; Specification Of The Safety Relay - Eaton PowerXL DA1 Series Installation Manual

2.10.2 TÜV certification

2.10.3 Specification of the safety relay

CAUTION

When used in conjunction with permanent magnet motors and
in the unlikely event of multiple output semiconductors (IGBTs)
failing, having the STO function activated may result in a motor
shaft rotational movement of 180 degrees/p = Number of
motor pole pairs).
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).
DA1 variable frequency drives with a TÜV logo on their nameplate feature an
STO function that complies with the following standards:
Standard
EN 61800-5-2:2007
EN ISO 13849-1:2006
EN 61508 (Part 1 to 7)
EN60204-1
EN 62061
￫
The following information and descriptions for the STO function
are translations of the original description in English (TÜV
specification).
Safety component monitoring requires an approvedsafety relay.
When used together with a DA1 variable frequency drive, the following
minimum requirements must be met for the STO function:
Standard requirement
Number of output contacts
Rated switching voltage
Current carrying capacity
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
Classification
Type 2: "Safely switched-off moment"
PL d
SIL 2
Stop category 0:
"Uncontrolled stopping by means of immediately cutting the
power supply to the machine drive elements"
SIL CL 2
SIL 2 or PL d SC 3 or better with interlocked opposing contacts
Two independent
30 V DC
100 mA (minimum)
2 Engineering
2.10 STO function
69