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F3SJ-A
User’s Manual
System Configuration and Functions
External Device Monitoring Function (EDM)
This function detects malfunctions, such as welding, in external relays (or contactors) that control the
hazardous area of a machine.
This function constantly monitors that a specified voltage is applied to the receiver's external device
monitoring input line, and enters lockout state when an error occurs. The relay's operational delay can
be up to 300ms without being evaluated as an error.
For example, if the (N.C.) contact is not closed and a specified voltage is not applied to the external
device monitoring line within 300ms after the safety outputs turn from ON to OFF, it is evaluated as an
error and enters a lockout state.
To utilize this function properly, use safety relays and contactors that have forcibly guided or
mechanically linked contact structure.
Wiring
Perform wiring so that 9 to 24V is applied to the external device monitoring line via the external relay's
normally closed (N.C.) contact.
When external device monitoring is not being used, apply auxiliary output 1 to the external device
monitoring output.
Timing chart
The F3SJ reads out a device monitoring input value 500ms or later after the power of the F3SJ is
turned ON. If the status of the safety outputs is changed back to the original status within the allowable
delay time, the F3SJ will not enter the lockout state.
T1: Allowable delay time
F3SJ's indicators
•For basic system: When an input is applied to the external device monitoring input, the external device
monitoring indicator (muting input 1 indicator) turns ON.
•For muting system: The indicators can not be used to check the input to the external device
monitoring input.
ON
OFF
T1=0.3s
T1=0.3s
ON
OFF
Unblocked
/Blocked
Unblocked
Blocked
External device
monitoring input
Safety output
Lockout
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Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]