STO safety sub-function

The following table shows the technical data of the STO safety sub-function.

The safe digital input F_STO_P corresponds to type 3 according to IEC 61131‑2.

The reference potential for F_STO_P is F_STO_M (contact at connector X5510:5).

 

Connection

Technical data

STO safety contact

X5510

 

Electrical data of the safe digital input F_STO_P

 

Minimum

Typical

Maximum

Input voltage range

X5510:4 and X5510:5

DC -3 V

DC 24 V

DC 30 V

Input capacitance against STO_M

 

–

300 pF

500 pF

Input capacitance against GND

 

–

300 pF

500 pF

Power consumption at DC 24 V:

F_STO_P

 

–

150 mW

200 mW

Input voltage for ON state (STO)

 

DC 11 V

–

–

Input voltage for OFF state (STO)

 

–

–

DC 5 V

Permitted leakage current of the external safety controller

 

–

–

1 mA

Maximum cable length

 

100 m