STO FUNCTION
APPLICATION MANUAL
SINUS PENTA
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7.2. Safety Relay Proposal for STO Application
General requirements
IEC 61508 and/or EN/ISO 13849-1
Type
Safety relay
Example
Manufacturer PILZ
– Part Number PNOZ X3. 10P
Approvals
SILCL 3 according to EN 62061 and PL according to EN ISO 13849-1
7.3. Push-button Proposal to be used with Emergency Stop for STO Application
Type
A push-button operated switch with a palm or mushroom head type.
Actuators of emergency stop devices are colored red.
Example
Manufacturer New Elfin
– Part Number 020020GE02
7.4. Switch Proposal to be used with Prevention of Unexpected Start-up Function
Implemented with STO for STO Application
Type
A lockable selector switch with a reliable and unambiguous indication of
positions.
Example
Manufacturer Kraus & Naimer
– Part Number DH11 A291-600, FT22-
V+S0V845/A11/D11.
7.5. Cable Proposal for STO Application
Type
Low voltage, 2 x 2 x 0.75 mm
2
(AWG19) Shielded twisted pair cable
Maximum length
25 m between STO inputs (ENABLE-A and ENABLE-B) and the operating
contact
Example
Manufacturer HELUKABEL
– Part Number Li YCY TP 2×2×0.75 mm
2
Shielded
twisted pair cable
Manufacturer TE.CO.
– Part Number 27265 O.R. PMXX (2x2x0.75) ST
Shielded twisted pair cable