Eaton ESR5-NV3-30, Руководство пользователя

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8 Operating modes
ESR5-NV3-30 12/19 MN049010EN www.eaton.com
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8.2 Two-channel with cross-circuit monitoring via external clock signals
If digital inputs S12 and S22 are controlled with the output signals of a safe
PLC or API safe, the emergency stop circuits are monitored for cross circuits
by the external clock signals.
Figure 10: Cross-circuit monitoring via external clock signals
Permitted signal form for light grid, safe PLC, and API safe
The following figure shows the permitted signal forms for external
clock signals at inputs S12 and S22.
The following applies to the high signal:
• The blanking intervals must not exceed 1 ms.
• The time between the blanking intervals must be no less than 10 ms.
The following applies to the low signal:
• The pulses must not exceed 1 ms.
• The time between two pulses must be no less than 10 ms.
Figure 11: Permitted signal form for light grid, safe PLC, and API safe
S11 S12 S21 S22
Safe-SPS/PLC
API-Safe
High
Low
10 ms
1 ms