Panasonic SF4D Series Instruction Manual page 74

Wiring
<Using NPN output>
Interlock function
External device monitor function Valid
Auxiliary output 1
*Symbols
Switch S1
0 to +2.5V (source current 5mA or less): Emission halt, Open: Emission
K1, K2: External device (forcible guide relay or magnetic conductor)
Note: For information on reset, refer to "3-2 Interlock Function (8-core cable, 12-core cable)".
74
Valid (manual reset)
Can be used
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