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TS, Safety timing relay
505
02/16 MN05013001Z EN
Timing relay, synchronous and asynchronous
flashing
Time value I1: mark time
Time value I2: space time
Synchronous (symmetrical) flashing: T1 equals T2
Asynchronous flashing: T1 not equal T2
Figure 265:
Signal diagram of timing relay, synchronous and
asynchronous flashing
a
The relay flashes via the TS..QS contact, for as long as the
trigger coil TS..TR is activated.
b
The Stop coil stops the run down of the flash time.
c
The dropping out of the coil TS..SA causes the timing relay to
deactivate and the contact TS..QS opens.
Example - Architecture of Category 4 according to
EN ISO 13849-1
If the emergency-stop button is actuated, the motor should
not stop immediately but only after 2 seconds (stop category
1 to EN IEC 60204-1).
This looks as follows in the electrical circuit diagram:
TS..SA
TS..TR
TS..QS
TS..ST
ts1 ts2
t1
t2
t1 + t2 = ts1
a
b
c
h
For information on the use of the emergency-stop safety
function block, see the example concerning how to
monitor a 2-channel emergency-stop button on page 368.
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