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Safety Outputs
Read this section for information about safety outputs.
Safety Output with Test Pulse
When the output is on, the test pulse is turned off in a cycle for a
period of time as shown in the the table and figure.
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.
Pulse Width and Period for X and Y
Attribute
1791DS-IB8XOB8
Pulse width, X
700 us
Pulse period,Y
648 ms
Test Pulse in a Cycle
ON
OUT
OFF
X
Y
To prevent the test pulse from causing the connected
IMPORTANT
device to malfunction, pay careful attention to the
input response time of the device.
Understand the Operation of Safety Functions
1791DS-IB8XOBV4,
1732DS-IB8XOBV4
700 us
600 ms
44096
Publication 1791DS-UM001H-EN-P - April 2009
27
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