Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual - Manual (Page 38)

38 Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 5 Pulse Testing
Then a sequence occurs in which each output is individually tested twice. The
test pulse is 50 μs wide. The test pulses occur every 250 ms and switch to the next
output configured with testing.
Figure 22 - Test Pulse Sequence
Terminal 13
Terminal 12
24V
0V
24V
0V
Terminal 20
Terminal 21
24V
0V
24V
0V
0 250 500ms