Technical Data; Sto Safety Relay Type - ABB MicroFlex e190 User Manual

204 Appendix: Safe Torque Off (STO)

Technical data

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STO safety relay type

General requirements
Output requirements
No. of current paths
Switching voltage capability
Switching current capability
Maximum switching delay
between contacts
Internal supply/multiple
units
Maximum length of safety
circuit from operating contact
to most distant drive
Maximum number of drives in
circuit
External supply/multiple
units
External power supply
Current requirement
Example 1
Type and manufacturer
Approvals
Example 2
Type and manufacturer
Approvals
EN 61508 and/or EN 61511 and/or
EN ISO 13849-1
2 independent paths (one for each STO path)
30 V DC per contact
10 mA per contact per drive
<200 ms
30 m (98.4 ft)
16
24 V DC +10% SELV
20 mA per connected drive
Simple SIL3 approved safety relay
PSR-SCP- 24UC/ESP4/2X1/1X2 by Phoenix
Contacts
EN 954-1, cat 4; EN 61508, SIL3
Programmable safety logic
PNOZ Multi M1p by Pilz
EN 954-1, cat 4; EN 61508, SIL3; and
EN ISO 13849-1, PL e