Safety Modules Owner manual

Rockwell Automation Publication 1791ES-UM001D-EN-P - May 2013 27
Understand the Operation of Safety Functions Chapter 2
Safety Outputs
Read this section for information about safety outputs.
Safety Output with Test Pulse
When the safety output is on, the safety output can be test pulsed, as shown in
the figure and table.
By using this function, short-circuits between output signal lines and the power
supply (positive side) and short-circuits between output signal lines can be
detected. If an error is detected, the safety output data and individual-safety
output status turns off.
Figure 12 - Test Pulse in a Cycle
Attribute 1791ES-IB8XOBV4
Pulse width 700 μs
Period 600 ms
IMPORTANT
To prevent the test pulse from causing the connected device to
malfunction, pay careful attention to the input response time of the device.
44096
OUT
On
Off
Typ ic al
700 μs
Typ ic al
600 ms