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External device monitor (EDM) output signal
The monitor output signal is used by the external device to monitor the state of the safety
input signal. Connect the monitor output to the external device monitor terminal of the
safety devices such as safety controller and safety sensor.
Signal Symbol Pin No. Contents
Control
mode
EDM
output
EDM+ 8
Outputs monitor signal that is used to check the
safety function.
Caution
This output signal is not a safety output.
Compatible
all control
mode
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Note
When both safety input 1 and 2 are off, i.e. when STO function of 2 safety input channels
are active, the photocoupler in EDM output circuit turns on.
Signal Symbol Photocoupler logic
Safety input
SF1 ON ON OFF OFF
SF2 ON OFF ON OFF
EDM output EDM OFF OFF OFF ON
By monitoring the logics (all 4 states) of photocoupler shown in the table above, the
external device can determine the status (normal or abnormal) of safety input circuit and
EDM output circuit.
Maximum delay time from input of safety 1 and 2 signals to output of EDM signal is 6 ms.
1. Safety function
Input & output signals
Note
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