Compliance With The European Machinery Directive; Wiring; Activation Switch - ABB ACS880-07 Hardware Manual

240 Safe torque off function
Standard
IEC 61508-1:2010
IEC 61508-2:2010
IEC 61511-1:2016
IEC 61800-5-2:2016
EN 61800-5-2:2007
IEC 62061:2015
EN 62061:2005
+AC:2010+A1:2013+A2:2015
EN ISO 13849-1:2015
EN ISO 13849-2:2012
The function also corresponds to Prevention of unexpected start-up as specified by
EN 1037:1995 + A1:2008 and Uncontrolled stop (stop category 0) as specified in
EN/IEC 60204-1.

Compliance with the European Machinery Directive


See section Compliance with the European Machinery Directive

Wiring

The following diagrams present examples of Safe torque off wiring for
•
a single drive (page 241)
•
multiple drives (page 243)
•
multiple drives when an external 24 V DC power supply is used (page 244).
For the specification of the STO input, see section

Activation switch


In the wiring diagrams below, the activation switch has the designation (K). This
represents a component such as a manually operated switch, an emergency stop push
button switch, or the contacts of a safety relay or safety PLC.
•
In case a manually operated activation switch is used, the switch must be of a type
that can be locked out to the open position.
•
The contacts of the switch or relay must open/close within 200 ms of each other.
•
An FSO-xx safety functions module or FPTC-0x thermistor protection module can also
be used. For more information, see the module documentation.
Name
Functional safety of electrical/electronic/programmable electronic safety-
related systems – Part 1: General requirements
Functional safety of electrical/electronic/programmable electronic safety-
related systems – Part 2: Requirements for
electrical/electronic/programmable electronic safety-related systems
Functional safety – Safety instrumented systems for the process industry
sector
Adjustable speed electrical power drive systems –
Part 5-2: Safety requirements – Functional
Safety of machinery – Functional safety of safety-related electrical,
electronic and programmable electronic control systems
Safety of machinery – Safety-related parts of control systems – Part 1:
General principles for design
Safety of machinery – Safety-related parts of control systems – Part 2:
Validation
on page 222.
Safe torque off (XSTO) on page 143.