8 Safety Function
8 - 4
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
This is a monitor output signal that is used to monitor the status of safety input signals using an external
device.
Connect the EDM output signal to the monitoring terminal on a safety device, such as a safety controller
or a safety sensor.
*1 This is not a safety output.
Normally when both safety inputs 1 and 2 are OFF, i.e., when the STO function is activated for both
safety input circuits, the EDM output is ON.
You can detect a failure of the safety input circuit and the EDM output circuit by monitoring all of the
following 4 signal states using an external device.
These are the two cases of errors:
• Both safety inputs 1 and 2 are OFF, but the EDM output circuit signal does not turn ON.
• Either or both safety inputs 1 and 2 are ON, but the EDM output circuit signal is ON.
The maximum delay time is 6 ms after the safety input signal is input until the EDM output signal is
output.
8-1-2 External Device Monitor (EDM) Output Signal
Signal
name
Symbol Pin No. Description
Control mode
Position
Speed Force
EDM
output
*1
EDM+ CN8-8 Monitor signal is output to detect malfunctioning
of the safety function.
333
EDM– CN8-7 333
8-1-3
Relationship Between Safety Input Signals and EDM Output Signal
Signal name Symbol Signal status
Safety input 1 SF1 ON ON OFF OFF
Safety input 2 SF2 ON OFF ON OFF
EDM output EDM OFF OFF OFF ON
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