Safety Relay User Manual Owner's manual

124 Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Appendix A Specifications
Recovery Times
Response Times
System Response Time
Calculation
The safety response time is the time that is required to establish the safe state of
the safety output function considering the demand of the safety monitoring
function and/or occurrence of faults and failures in the safety chain. The overall
response time of the safety function considers the whole safety chain, including
the safety input device, logic device, and actuator. The safety response time is
used to calculate the safety distance, distance between a safeguarding device, and
the hazardous area.
The following paths have to be considered:
Figure 131 - System Response Time
To trigger Inputs again Response time as demand + reaction time + 100 ms
Safety Input 45 ms + Input Filter time
Single Wire Safety Input <45 ms
Safety Mats <70 ms
Single Wire Safety Output <60 ms
Input Logic Actuator
E.g. CR30
E.g.
Interlock
switch
E.g.
Contactor
Embedded
Input
CPU, Logic
routing
Embedded
Output