Safe Brake Test - Sbt - Pilz PMCprotego S1 Operating Manual

4 Function Description
4.3 Safety functions
4.3.9

Safe brake test - SBT

4- Sicherheitsfunktion_SBT_Ueber Safe brake test - SBT
Sicherheitsfunktion_Sxx_Ueberwach
Timing diagram
v, I B
I B (t)
1
SS1 Activate
0
1
SS1 SIL3/Reset
0
1
Ready
0
1
STO Acknowledge
0
1
SBC+/SBC-
0
Fig. 4-13: Safety function SBC
t : Activation of safety function STO and SBC

1
t : End of safety function SBC

2
SS1 Activate: Input for safety function SS1

SS1 SIL3/Reset: Input for SIL3 and reset

Ready: Output for operating status of the safety card

STO Acknowledge: Output for feedback from safety function STO

SBC+: Brake control output

The safety function "safe brake test" (SBT) is used to test the external
(holding brake) plus the internal brake (motor brake).
Features of the safety function:
The servo amplifier receives a command to control the motor brake

from the safety card, via the internal interface.
An external mechanical brake is controlled via the 2-pole output

"SBC+/SBC-" on the safety card.
v(t) SBC
t 1
t 2
t
4-31