SICK TR4 Instrucciones De Servicio página 93

Operating Instructions
TR4
Response time to safety
request (removal from the
enable zone)
Response time on
approach to the enable
zone (enable time)
Response time in case of
device-internal errors
5)
Risk time
Time delay before
6)
availability
7)
Cable length
Max. number of cascaded
safety switches
Material
Sensor
Actuator
Outputs
2 OSSDs (Out A and Out B)
Auxiliary contact (Aux)
8014467/YIJ2/2015-03-02
Subject to change without notice
Technical specifications
Minimum
4)
Unlimited, however it is recommended to limit the number
to 30. See also section 9.1 "Response time" on page 91).
Valox® DR 48
Valox® DR 48
2 × PNP, 0.2 A max., short-circuit-proof and overload-proof
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
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
Typical
60 ms
360 ms
2.5 s
= 14,5 V).
max
en
Chapter 9
Maximum
60 ms
60 s
200 m
93