No. SX-DSV02472 -
124-
8-2-2 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.
Type
Signal
Symbol
Pin
No.
Contents
Control mode
Position Velocity Torque
Full-
close
Out
put
EDM output
EDM+
X3-8 Outputs monitor signal that is used to check the safety
function.
This output signal is not a safety output.
EDM-
X3-7
• The table below shows the 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
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. That is, when error occurs, the EDM
output circuit does not turn ON the photocoupler even if both safety inputs 1 and 2 are OFF. Or, reversely, the EDM
output circuit turns ON the photocoupler if one of or both of safety inputs 1 and 2 are ON.
• Maximum delay time from input of safety 1 and 2 signals to output of EDM signal is 6 ms.
8-2-3 Internal signal circuit block diagram
See the safety circuit block diagram at the end of This document.
R1.05
Motor Business Division, Appliances Company, Panasonic Corporation
