Input & Output Signals - Panasonic MINAS A6 Series Operating Instructions Manual

1. Safety function
Input & output signals
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
EDM
output
Logical relationship between safety input signal and EDM output signal
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
Safety input
EDM output
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. That is to say, in the case of an anomaly, although both safety input
1 and 2 are off, the photocoupler in EDM output circuit does not turn on. Or, although
either safety input 1 or 2 or both safety input 1 and 2 turned on, the state in which the
photocoupler in EDM output circuit turned on has been detected.
Note
Maximum delay time from input of safety 1 and 2 signals to output of EDM signal is 6 ms.
• P.2-2 "Conformance to international standards" • P.2-74 "How to Use the Front Panel"
Re ated page
• P.3-33 "Inputs and outputs on connector X4"
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7-4
Symbol Pin No.
EDM+ 8
Outputs monitor signal that is used to check the
safety function.
Caution
EDM− 7
Symbol
SF1
SF2
EDM
Contents
This output signal is not a safety output.
photocoupler logic
ON ON
ON OFF
OFF OFF
Control mode
Compatible
all control
mode
OFF OFF
ON OFF
OFF ON