STO safety sub-function

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

The safe digital inputs F_STO_P1 and F_STO_P2 correspond to IEC 61131-2 for devices without SBM brake module type 3.

Reference potential for F_STO_P1 and F_STO_P2 is STO_M (contact at terminal X5504:5).

 

Terminal

Technical data

STO safety contact

X5504

–

Electrical data of the safe digital inputs F_STO_P1, F_STO_P2

 

Minimum

Typical

Maximum

Input voltage range

X5504:1 and X5504:3

DC -3 V

DC 24 V

DC 30 V

Input capacitance against STO_M

 

–

300 pF

500 pF

Input capacitance against STO_M with one SBM brake module

 

–

1.5 µF

2.5 µF

Input capacitance against STO_M with 2 SBM brake modules

 

–

3 µF

5 µF

Input capacitance against GND

 

–

300 pF

500 pF

Input capacitance against GND with one SBM brake module

 

–

1.5 µF

2.5 µF

Input capacitance against GND with 2 SBM brake modules

 

–

3 µF

5 µF

Power consumption at DC 24 V:

F_STO_P1

 

–

150 mW

200 mW

F_STO_P2

 

–

150 mW

200 mW

Total

 

–

300 mW

400 mW

Power consumption at DC 24 V:

F_STO_P1 with one SBM brake module

 

–

200 mW

260 mW

F_STO_P2

 

–

150 mW

200 mW

Total

 

–

350 mW

460 mW

Power consumption at DC 24 V:

F_STO_P1 with 2 SBM brake modules

 

–

250 mW

320 mW

F_STO_P2

 

–

150 mW

200 mW

Total

 

–

400 mW

520 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

 

–

–

3 mA

Maximum cable length without SBM brake module

100 m

Maximum cable length with SBM brake module

30 m