Voith BTS-Ex - Page 33

Installation and Operating Manual / Version 7 / 3626-019600ex en / Protection class
0: public / 2020-07-15
33
BTS-Ex, non-contacting thermal switch unit
Display and Setting of Evaluator
SAFETY INFORMATION
•
The start-up bypass time begins with triggering the start-up bypass.
•
After the start-up bypass time, the speed of the
turbo coupling with switching
element must have clearly the set cutoff frequency.
•
Factory setting of the start-up bypass time: 5 s.
Evaluator with start-up bypass (S3 = I)
The evaluator with start-up bypass switches output I in a passive state, output II in
an active state when falling below the cutoff frequency adjusted by means of DIP
switches S1 and S2 ( principle sketch below).
Input I
is monitored for open circuit / short-line fault.
It is mandatory to connect the original Voith sensor.
Input II
has to be used to trigger the start-up bypass. There is no monitoring for open circuit /
short-line fault. Duration of the start-up bypass can be selected via bridge (switch-on
trigger) or an external trigger signal between 5 and 20 seconds.
Fig. 9
active
passive
Output I Effective direction MIN / passive
Switching point
active
passive
Switching point
f
f
Output II Effective direction MIN / active