SICK TR4 Instrucciones De Operación página 165

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
3)
Risk time
Time delay before
4)
availability
5)
Cable length
Max. number of cascaded
safety switches
Material
Sensor
Actuator
Outputs
2 OSSDs (Out A and Out B)
Auxiliary contact (Aux)
8014465/2012-05-07
Subject to change without notice
Technical specifications
Minimum
2)
Unlimited, however it is recommended to limit the number
to 30. See also section 9.1 "Response time" on page 163).
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
2)
At least one of the two OSSD outputs is safely switched off within the
response time.
3)
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.
4)
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.
5)
The cable length and cable cross-section change the voltage drop as a
function of the output current (R
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
Typical
60 ms
360 ms
2.5 s
= 14.5 U).
max
GB
Chapter 9
Maximum
60 ms
60 s
200 m
165