Safety specifications

System requirements

Required Firmware

• v4.2.0 or higher

Supported Hardware

• SOMANET Circulo 7

• SOMANET Circulo 9

Technical specifications

Safety parameters
Safety Integration level (SIL) according to IEC 61508:2010	SIL 3
Performance Level (PL) according to ISO 13849-1:2015	PL e cat. 3
Safe Failure Fraction (SFF)	TBD
Probability of dangerous failure per hour (PFH d)	TBD
Probability of dangerous failure on demand (PFD avg)	TBD
Common Cause Failure (CCF)	TBD
Hardware Fault Tolerance (HFT)	1
Reaction time	10 ms
De-activation time	10 ms
Mean Time to dangerous Failure (MTTF d)	TBD
Diagnostic coverage (DC avg)	TBD
HW-type	Type A
Mission time T M	TBD
Supported safety modes	High, Low

Installation requirements
Max. installation altitude	2000 m
Pollution Degree	PD 2
Supported Motors	1 x 3-phase BLDC-Motor and 1 active brake

Attention

Servo drives including STO-SBC module shall be used only in Pollution Degree environments class PD 2 according to IEC 61800-5-1: During normal operation only non-conductive pollution may occur, temporarily occurring conductivity caused by condensation may only be expected when the servo drive is out of operation.

Safe digital inputs (STO-SBC input)
Number of digital inputs	2 (dual-channel safety input for activating STO-SBC function)
Digital input type according to IEC61131-2:2007	Type 1
Voltage range	0-60 VDC
Max. transient input voltage	80 VDC
Input voltage, logic 1	15-60 V
Input voltage, logic 0	0-5 V
Input current	Max. 6 mA (@24 VDC)
Test pulse toleration (OSSD pulses)	Max. 1 ms
Reverse voltage protected	Yes
Allowed discrepancy between digital inputs	100 ms See diagnostic functions

Safe brake output (SBC)
Number of digital outputs	2 (dual-channel safety output for one brake system)
Max. output voltage	Servo drive main power supply (48 VDC)
Min. output voltage	0 V
Max. current.	1 A
Max. peak current.	4 A

Note

This PWM controlled brake is configured by the same object as the regular brake.