SICK TR4

Operating Instructions Chapter 9
TR4
8014467/YTD7/2016-03-30 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 91
Subject to change without notice
Technical specifications
en
9 Technical specifications
9.1 Response time
9.1.1 Response time of a single safety switch TR4
Guard opened φ
60 ms φ
Safety outputs
switched off
Guard closed φ 360 ms φ Safety outputs enabled
9.1.2 Response time for multiple cascaded TR4 safety
switches
In a cascade each downstream safety switch increases the response
time of the system by a further 40 ms.
Example 1: cascade comprising 5 safety switches TR4
Safety switch no. 1 is opened: 60 m
s
4 downstream safety switches à 40 ms: 160
ms
Resulting response time: 220
ms
Example 2: cascade comprising 5 safety switches TR4
Safety switch no. 4 is opened:
60 ms
1 downstream safety switch à 40 ms: 40
ms
Resulting response time: 100
ms