Intentional Misuse; Decommissioning; Safety Data; Safety Data Values - ABB +Q951 Original User Manual

20

Intentional misuse

The safety circuit is not designed to protect a machine against intentional misuse

Decommissioning

When you decommission an emergency stop circuit or a drive, make sure that the safety of the machine
is maintained until the decommissioning is complete.

Safety data

The safety data given below is valid for the default design of the safety circuit. In case the final design
differs from the default, it is obligation of the changing person to calculate new safety data and deliver
it separately to the customer.

Safety data values

Drive module SIL /
frame size SILCL
H1 ... H8 3
1) PFH values are according to EN ISO 13849.
2) DC depends on the used STO mode and directly reflects to needed test interval.
3) See the recommendation of use CNB/M/11.050 published by the European coordination of notified
bodies for lower T1 requirement and also IEC61800-5-2:2016 / EN61800-5-2:2017 6.2.2.1.4 Note 2 for
guidance.
4) T1 = 20a is used with high demand mode of operation. See also section

Safety component types

Safety component types as defined in IEC 61508-2:
−
emergency stop button: type A
−
safety relays: type A
−
drive STO circuit:
−
frame sizes H1 ... H5: type A

Safety block diagram

The components that are included in the safety circuit are shown in the safety block diagram below.
E-Stop
Button

Relevant failure modes

Internal failures of safety relays, the emergency stop button and STO. These failures are included in the
PFH value of the function.
Option description and instructions
1)
SC PL PFH [1/h]
3 e 5.4 E-8
E-Stop Drive
Safety module
Relay (STO)
3ADW000508R0201+Q964 E-Stop cat.1 without opening mains contactor en b
2)
DC Cat. HFT CCF
[%]
>90 3 1 80
3)4)
Lifetime T1 [a]
[a]
20 20/1
Proof test interval
on page 19.