Operating Instructions Chapter 9
TR4
8014467/YTD7/2016-03-30 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 93
Subject to change without notice
Technical specifications
en
Minimum Typical Maximum
Response time to safety
request (removal from the
enable zone)
60 ms
Response time on
approach to the enable
zone (enable time)
360 ms
Response time in case of
device-internal errors
4)
60 ms
Risk time
5)
60 s
Time delay before
availability
6)
2.5 s
Cable length
7)
200 m
Max. number of cascaded
safety switches
Unlimited, however it is recommended to limit the number
to 30. See also section 9.1 “Response time” on page 91).
Material
Sensor
Actuator
Valox® DR 48
Valox® DR 48
Outputs
2 OSSDs (Out A and Out B) 2 × PNP, 0.2 A max., short-circuit-proof and overload-proof
Auxiliary contact (Aux) 1 × PNP, 0.2 A max., short-circuit-proof and overload-proof
4)
At least one of two OSSD outputs is safely switched off within response time.
5)
The risk time is the error detection time for external errors. External errors
affect the OSSD safety outputs (short-circuit on an OSSD safety output or
cross circuit between the two safety outputs). At least one of the two OSSD
outputs is safely switched off within the risk time. Note that the time for the
safety request (renewed closing of the protective device) must be greater
than the risk time.
6)
After switching on the operating voltage, the OSSD outputs and the application
diagnostic output are low during the time delay before availability. The stated time
applies for one sensor, in case of a cascade 0.1 s must be added per sensor.
7)
The cable length and cable cross-section change the voltage drop as a func-
tion of the output current (R
max
= 14,5 Ω).
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