IDEC SE2L Series, User Manual

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SE2L User’s Manual (SE9Z-B1865)
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When the pattern is set for static input, area number and encoder speed monitoring are configured. Speed
monitoring monitors the speed of the encoder and if it exceeds the limit OSSD will be switched to OFF state.
Figure 3-13(b) shows the example of static input setting. In this example, Area1 is assigned to the input
pattern and speed monitoring is enabled with the monitoring speed range -20 to 500cm/sec.
Figure 3-13 (b) Example of static input setting
3.7 OSSD
OSSD is safety-related signal. When humans or objects are detected in the protection zone, the OSSD
signal will switch to OFF state from ON-state. OSSD signal has the self- diagnostic function which tests the
signal periodically by switching it to OFF state for a brief period. Signal is continuously switched to
OFF-state when an error is detected during the diagnostic.
Output states of OSSD1 and OSSD2 signal are identical. Both signals should be connected to the safety
related machines or control system to fulfill the required safety level. If OSSD3 and OSSD4 are used they
must be connected in the same manner.
 When OSSD is at ON state, the signal is 24V and the signal is 0V during OFF state.
 OSSD is a safety related signal and should be connected directly to the relay or
device that switches the machine or vehicle under control.
 Both the OSSD1 and OSSD2 outputs should be connected to the safety related
machines or control system. If OSSD3 and OSSD4 are used they must be connected
similarly.
 Sufficient time for the machine or vehicle must be allocated to stop when configuring
the response time of OSSD.
 User must verify the configuration before actual operation.