Off delay – Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
Page 84
84
Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 11
Safety Outputs
OFF Delay
The OFF Delay block turns off the output after the specified time delay expires.
The retriggerable parameter can be set to enabled or disabled.
•
When enabled, the input to the OFF Delay block can go HI again during
the timing cycle, and the output remains HI.
•
When disabled, the timing cycle runs to completion, regardless of changes
to the input.
shows the OFF Delay output block that is connected to a gate switch
block through Logic Level LLB1. The feedback signal is provided by SMF2 and
manual reset by SMF3. The time delay is set to 30. The output will turn off 1500
ms (30x50 ms) after the gate is opened. The output is connected to:
•
Terminals 18 and 19 for dual channel safety switching of the machine
hazards.
•
Terminal 20, which is configured as a Single Wire Safety (SWS) output.
•
Terminal 00 of Plug-in 2 for status reporting
Figure 103 - OFF Delay Configuration
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