Jetter JetMove 225-480, Руководство пользователя, Страница: 101 / 126

JetMove 225-480 13 Safe Standstill (Option)
Jetter AG 101
13.5.1 Control variants for "Safe Standstill"
• Controlling via safety relays
• OSSD control
OSSD: Online Switched Silicon Device (switched semiconductor)
Controlling the inputs "Safe Standstill" with test pulses for recognizing short
circuits, shorts between contacts, or shunts of the control cable. The test pulses
have a length of 1 ms and a repetition frequency of 100 Hz. At applying a control
logic with OSSD signals, faults (e.g. short circuits or shorts between contacts) can
be recognized by the logic itself, which will lead to switching off both signal ways.
The following signal waveforms are accepted by the OSSD signals without triggering
a fault message:
Fig. 23: Example: OSSD-signal waveform, single pulse
Fig. 24: Example: OSSD-signal waveform, dual pulse
The following figures show the basic illustrations of the applications named above.
24 V
0 V
< 1.3 ms > 7.0 ms
24 V
0 V
< 0.8 ms
> 7.0 ms
< 0.8 ms 0.5 ms