2
8
4
7
3
5
6
1
OSSD1
OSSD2
OSSD1
OSSD2
OSSD1
OSSD2
OSSD1
OSSD2
OSSD1
OSSD2
2
8
4
7
3
5
6
1
2
8
4
7
3
5
6
1
2
8
4
7
3
5
6
1
2
8
4
7
3
5
6
1
24 V DC
0 V DC
1
/
/
/
/
/
1
1
1
1
2
TR10 Lock
Safe evaluation unit
The maximum number of safety locking devices depends on the following factors:
•
Supply voltage applied
•
Length of cables used
•
Cross-section of cables used
•
Load current
The voltage drop in the cascade must be checked to ensure that the defined minimum
voltage is still present at the last safety locking device.
The number of safety locking devices in a cascade affects the response time of the sys‐
tem (
).
The cascade can be implemented via special T-connectors and an end connector (
"Connecting a cascade", page 22
NOTE
In the case of safety switches cascaded using T-connectors, it is not possible to evalu‐
ate the application diagnostic output.
4.5
Testing plan
The safety locking device must be tested by appropriately qualified safety personnel
when commissioning, after modifications, and at regular intervals.
The regular thorough checks serve to investigate the effectiveness of the safety locking
device and discover defects because of modifications or external influences (such as
damage or tampering).
The manufacturer and user must define the type and frequency of the thorough checks
on the machine on the basis of the application conditions and the risk assessment.
Determination of the thorough checks must be documented in a traceable manner.
4
PROJECT PLANNING
16
O P E R A T I N G I N S T R U C T I O N S | TR10 Lock
8019972/2016-07-19 | SICK
Subject to change without notice